diff --git a/README.md b/README.md
index 612ae0e..57829e8 100644
--- a/README.md
+++ b/README.md
@@ -1373,6 +1373,35 @@ Para que eso funcione, la comprobación de permisos es ahora una sola regla en
 (`register_permission_check_method => false`): la de spatie respondía antes y
 concedía el permiso sin preguntar al token.
 
+### Webhooks salientes
+
+```
+       /api/v1/webhooks                      CRUD (permiso webhooks.*, solo admin)
+GET    /api/v1/webhooks/{id}/deliveries      qué se envió y cómo fue
+POST   /api/v1/webhooks/{id}/ping            envío de prueba
+POST   /api/v1/webhook-deliveries/{id}/redeliver
+```
+
+Avisan a otro sistema de `application.received`, `content.published`,
+`content.unpublished`, `review.requested` y `review.returned` (o `*`). Salen de
+los propios registros —el historial ya distingue publicar de editar, venga del
+panel, de la API o de un lote— y no de los controladores, así que no hay forma
+de publicar algo sin que se avise.
+
+Cada envío es un POST JSON `{id, event, created_at, data}` firmado: la cabecera
+`X-Webhook-Signature` es `sha256=` más el HMAC-SHA256 de `{timestamp}.{body}`
+con el secreto, y `X-Webhook-Timestamp` va aparte para que un envío capturado
+no se pueda repetir más tarde. El secreto se genera solo (o se rota con
+`rotate_secret`), se guarda cifrado y sale una única vez.
+
+Las mismas defensas que el descargador de imágenes, porque la petición sale
+desde dentro del stack: solo HTTPS, solo direcciones públicas —comprobado al
+guardar y **otra vez en cada envío**, fijando la conexión a la dirección
+comprobada—, sin seguir redirecciones. Cinco reintentos en unas dos horas y
+media; veinte fallos seguidos lo apagan hasta que alguien lo vuelve a activar.
+Los datos de quien escribe al buzón (nombre, correo, mensaje) solo viajan a los
+webhooks con `include_personal_data`.
+
 ### Lotes e importación
 
 ```
diff --git a/app/Http/Controllers/Api/V1/WebhookController.php b/app/Http/Controllers/Api/V1/WebhookController.php
new file mode 100644
index 0000000..cdd2e5a
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/WebhookController.php
@@ -0,0 +1,146 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Api\V1\WebhookRequest;
+use App\Http\Resources\WebhookDeliveryResource;
+use App\Http\Resources\WebhookResource;
+use App\Jobs\DeliverWebhook;
+use App\Models\Webhook;
+use App\Models\WebhookDelivery;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
+use Illuminate\Support\Str;
+
+/**
+ * Outgoing webhooks: where to send, which events, and how it has gone.
+ */
+class WebhookController extends Controller
+{
+    public function index(Request $request): AnonymousResourceCollection
+    {
+        $this->authorize('viewAny', Webhook::class);
+
+        return WebhookResource::collection(
+            Webhook::query()->latest('id')->paginate(perPage: min($request->integer('per_page', 25), 100)),
+        );
+    }
+
+    /**
+     * The secret is in the answer once, when it is made (or rotated), and
+     * never again.
+     */
+    public function store(WebhookRequest $request): JsonResponse
+    {
+        $this->authorize('create', Webhook::class);
+
+        $secret = $request->input('secret') ?: Str::random(40);
+
+        $webhook = new Webhook([...$request->validated(), 'secret' => $secret]);
+        $webhook->forceFill(['created_by' => $request->user()->id])->save();
+
+        return WebhookResource::make($webhook->refresh())
+            ->additional(['secret' => $secret])
+            ->response()
+            ->setStatusCode(201);
+    }
+
+    public function show(Webhook $webhook): WebhookResource
+    {
+        $this->authorize('view', $webhook);
+
+        return WebhookResource::make($webhook);
+    }
+
+    /**
+     * Switching it back on starts its failure count again.
+     */
+    public function update(WebhookRequest $request, Webhook $webhook): JsonResponse
+    {
+        $this->authorize('update', $webhook);
+
+        $data = $request->validated();
+        $rotated = $request->boolean('rotate_secret') ? Str::random(40) : null;
+        unset($data['rotate_secret']);
+
+        $webhook->fill($data);
+
+        if ($rotated !== null) {
+            $webhook->secret = $rotated;
+        }
+
+        if ($webhook->isDirty('is_active') && $webhook->is_active) {
+            $webhook->consecutive_failures = 0;
+        }
+
+        $webhook->save();
+
+        return WebhookResource::make($webhook)
+            ->additional($rotated !== null ? ['secret' => $rotated] : [])
+            ->response();
+    }
+
+    public function destroy(Webhook $webhook): JsonResponse
+    {
+        $this->authorize('delete', $webhook);
+
+        $webhook->delete();
+
+        return response()->json(status: 204);
+    }
+
+    /**
+     * Newest first. Filter: status.
+     */
+    public function deliveries(Request $request, Webhook $webhook): AnonymousResourceCollection
+    {
+        $this->authorize('view', $webhook);
+
+        return WebhookDeliveryResource::collection(
+            $webhook->deliveries()
+                ->when($request->filled('status'), fn ($q) => $q->where('status', $request->string('status')))
+                ->paginate(perPage: min($request->integer('per_page', 25), 100))
+                ->withQueryString(),
+        );
+    }
+
+    /**
+     * A `ping`, to check the receiving end before anything real happens.
+     */
+    public function ping(Webhook $webhook): JsonResponse
+    {
+        $this->authorize('update', $webhook);
+
+        $delivery = $webhook->deliveries()->create([
+            'uuid' => (string) Str::uuid(),
+            'event' => 'ping',
+            'payload' => ['webhook' => $webhook->id, 'events' => $webhook->events],
+        ]);
+
+        DeliverWebhook::dispatch($delivery);
+
+        return WebhookDeliveryResource::make($delivery->refresh())->response()->setStatusCode(202);
+    }
+
+    /**
+     * Send one again, as a new delivery of the same event and payload.
+     */
+    public function redeliver(WebhookDelivery $delivery): JsonResponse
+    {
+        $this->authorize('update', $delivery->webhook);
+
+        $again = $delivery->webhook->deliveries()->create([
+            'uuid' => (string) Str::uuid(),
+            'event' => $delivery->event,
+            'payload' => $delivery->payload,
+        ]);
+
+        DeliverWebhook::dispatch($again);
+
+        return WebhookDeliveryResource::make($again->refresh())->response()->setStatusCode(202);
+    }
+}
diff --git a/app/Http/Requests/Api/V1/WebhookRequest.php b/app/Http/Requests/Api/V1/WebhookRequest.php
new file mode 100644
index 0000000..22a8569
--- /dev/null
+++ b/app/Http/Requests/Api/V1/WebhookRequest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Requests\Api\V1;
+
+use App\Models\Webhook;
+use App\Support\Webhooks\PublicEndpoint;
+use Closure;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class WebhookRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        $creating = ! $this->route('webhook') instanceof Webhook;
+        $sometimes = $creating ? 'required' : 'sometimes';
+
+        return [
+            'name' => [$sometimes, 'string', 'max:120'],
+            'url' => [
+                $sometimes,
+                'string',
+                'url',
+                'max:2048',
+                // Refused now rather than at the first delivery; checked
+                // again at every delivery all the same.
+                function (string $attribute, mixed $value, Closure $fail): void {
+                    [, $reason] = app(PublicEndpoint::class)->check((string) $value);
+
+                    if ($reason !== null) {
+                        $fail(__("rules.media.remote.{$reason}"));
+                    }
+                },
+            ],
+            'events' => [$sometimes, 'array', 'min:1'],
+            'events.*' => ['string', 'distinct', Rule::in(['*', ...Webhook::EVENTS])],
+            'secret' => [$creating ? 'sometimes' : 'prohibited', 'nullable', 'string', 'min:16', 'max:255'],
+            'rotate_secret' => [$creating ? 'prohibited' : 'sometimes', 'boolean'],
+            'include_personal_data' => ['sometimes', 'boolean'],
+            'is_active' => ['sometimes', 'boolean'],
+        ];
+    }
+}
diff --git a/app/Http/Resources/WebhookDeliveryResource.php b/app/Http/Resources/WebhookDeliveryResource.php
new file mode 100644
index 0000000..123a3d7
--- /dev/null
+++ b/app/Http/Resources/WebhookDeliveryResource.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Resources;
+
+use App\Models\WebhookDelivery;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @mixin WebhookDelivery
+ */
+class WebhookDeliveryResource extends JsonResource
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => $this->id,
+            'uuid' => $this->uuid,
+            'event' => $this->event,
+            'status' => $this->status,
+            'attempts' => (int) $this->attempts,
+            'response_status' => $this->response_status,
+            'error' => $this->error,
+            'payload' => (object) ($this->payload ?? []),
+            'delivered_at' => $this->delivered_at?->toIso8601String(),
+            'created_at' => $this->created_at?->toIso8601String(),
+        ];
+    }
+}
diff --git a/app/Http/Resources/WebhookResource.php b/app/Http/Resources/WebhookResource.php
new file mode 100644
index 0000000..5f74af5
--- /dev/null
+++ b/app/Http/Resources/WebhookResource.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Resources;
+
+use App\Models\Webhook;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * Never the secret.
+ *
+ * @mixin Webhook
+ */
+class WebhookResource extends JsonResource
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => $this->id,
+            'name' => $this->name,
+            'url' => $this->url,
+            'events' => $this->events ?? [],
+            'include_personal_data' => (bool) $this->include_personal_data,
+            'is_active' => (bool) $this->is_active,
+            'consecutive_failures' => (int) $this->consecutive_failures,
+            'last_delivered_at' => $this->last_delivered_at?->toIso8601String(),
+            'created_at' => $this->created_at?->toIso8601String(),
+            'updated_at' => $this->updated_at?->toIso8601String(),
+        ];
+    }
+}
diff --git a/app/Jobs/DeliverWebhook.php b/app/Jobs/DeliverWebhook.php
new file mode 100644
index 0000000..e8c13f9
--- /dev/null
+++ b/app/Jobs/DeliverWebhook.php
@@ -0,0 +1,152 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Jobs;
+
+use App\Models\Webhook;
+use App\Models\WebhookDelivery;
+use App\Support\Webhooks\PublicEndpoint;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Http\Client\ConnectionException;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Str;
+use RuntimeException;
+
+/**
+ * Sends one delivery, signed, and retries it with growing pauses.
+ *
+ * The receiver checks `X-Webhook-Signature`: `sha256=` and the HMAC of
+ * `{timestamp}.{body}` with the webhook's secret, the timestamp being
+ * `X-Webhook-Timestamp` — so a captured delivery cannot be replayed later
+ * under a new date.
+ */
+class DeliverWebhook implements ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    public int $tries = 5;
+
+    public function __construct(public WebhookDelivery $delivery) {}
+
+    /**
+     * @return array<int, int>
+     */
+    public function backoff(): array
+    {
+        return [60, 300, 1800, 7200];
+    }
+
+    public function handle(PublicEndpoint $endpoint): void
+    {
+        $delivery = $this->delivery;
+        $webhook = $delivery->webhook;
+
+        if ($webhook === null || ! $webhook->is_active) {
+            return;
+        }
+
+        $delivery->increment('attempts');
+
+        $body = (string) json_encode([
+            'id' => $delivery->uuid,
+            'event' => $delivery->event,
+            'created_at' => $delivery->created_at?->toIso8601String(),
+            'data' => $delivery->payload,
+        ], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+
+        [$address, $refused] = $endpoint->check($webhook->url);
+
+        // Checked again at every attempt, not only when the URL was saved: a
+        // name can be pointed somewhere else in between.
+        if ($refused !== null) {
+            $this->failed(new RuntimeException(__("rules.media.remote.{$refused}")));
+            $this->delete();
+
+            return;
+        }
+
+        $parts = parse_url($webhook->url);
+        $timestamp = (string) now()->timestamp;
+
+        try {
+            $response = Http::withOptions([
+                'allow_redirects' => false,
+                'connect_timeout' => 5,
+                'timeout' => 10,
+                'curl' => [CURLOPT_RESOLVE => [sprintf(
+                    '%s:%d:%s',
+                    trim((string) $parts['host'], '[]'),
+                    (int) ($parts['port'] ?? 443),
+                    str_contains((string) $address, ':') ? "[{$address}]" : $address,
+                )]],
+            ])
+                ->withHeaders([
+                    'Content-Type' => 'application/json',
+                    'X-Webhook-Event' => $delivery->event,
+                    'X-Webhook-Delivery' => $delivery->uuid,
+                    'X-Webhook-Timestamp' => $timestamp,
+                    'X-Webhook-Signature' => 'sha256='.hash_hmac('sha256', "{$timestamp}.{$body}", (string) $webhook->secret),
+                ])
+                ->withUserAgent(sprintf('%s/1.0 (+%s; webhooks)', Str::slug((string) config('app.name')) ?: 'landing', rtrim((string) config('app.url'), '/')))
+                ->withBody($body, 'application/json')
+                ->post($webhook->url);
+        } catch (ConnectionException $e) {
+            $this->retryOrFail($e->getMessage(), null);
+
+            return;
+        }
+
+        if ($response->successful()) {
+            $delivery->update([
+                'status' => WebhookDelivery::SUCCEEDED,
+                'response_status' => $response->status(),
+                'error' => null,
+                'delivered_at' => now(),
+            ]);
+
+            $webhook->forceFill(['consecutive_failures' => 0, 'last_delivered_at' => now()])->save();
+
+            return;
+        }
+
+        $this->retryOrFail(Str::limit($response->body(), 500), $response->status());
+    }
+
+    public function failed(?\Throwable $e): void
+    {
+        $this->delivery->update([
+            'status' => WebhookDelivery::FAILED,
+            'error' => Str::limit((string) $e?->getMessage(), 500),
+        ]);
+
+        $webhook = $this->delivery->webhook;
+
+        if ($webhook !== null) {
+            $failures = $webhook->consecutive_failures + 1;
+
+            $webhook->forceFill([
+                'consecutive_failures' => $failures,
+                'is_active' => $failures < Webhook::MAX_FAILURES && $webhook->is_active,
+            ])->save();
+        }
+    }
+
+    protected function retryOrFail(string $error, ?int $status): void
+    {
+        $this->delivery->update(['response_status' => $status, 'error' => $error]);
+
+        if ($this->attempts() < $this->tries) {
+            $this->release($this->backoff()[$this->attempts() - 1] ?? 7200);
+
+            return;
+        }
+
+        $this->failed(new RuntimeException($error));
+        $this->delete();
+    }
+}
diff --git a/app/Models/Webhook.php b/app/Models/Webhook.php
new file mode 100644
index 0000000..fe1a440
--- /dev/null
+++ b/app/Models/Webhook.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Attributes\Hidden;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+/**
+ * Somewhere to tell when something happens here.
+ */
+#[Fillable(['name', 'url', 'secret', 'events', 'include_personal_data', 'is_active'])]
+#[Hidden(['secret'])]
+class Webhook extends Model
+{
+    use HasFactory;
+
+    /**
+     * What can be subscribed to. `*` is all of them.
+     */
+    public const EVENTS = [
+        'application.received',
+        'content.published',
+        'content.unpublished',
+        'review.requested',
+        'review.returned',
+    ];
+
+    /**
+     * Switched off after this many failed deliveries in a row, so a dead
+     * endpoint does not keep a queue busy forever. Switching it back on is a
+     * person's decision.
+     */
+    public const MAX_FAILURES = 20;
+
+    protected $attributes = [
+        'include_personal_data' => false,
+        'is_active' => true,
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'secret' => 'encrypted',
+            'events' => 'array',
+            'include_personal_data' => 'boolean',
+            'is_active' => 'boolean',
+            'last_delivered_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * @return HasMany<WebhookDelivery, $this>
+     */
+    public function deliveries(): HasMany
+    {
+        return $this->hasMany(WebhookDelivery::class)->latest('id');
+    }
+
+    public function listensTo(string $event): bool
+    {
+        $events = $this->events ?? [];
+
+        return in_array('*', $events, true) || in_array($event, $events, true);
+    }
+
+    /**
+     * @param  Builder<$this>  $query
+     * @return Builder<$this>
+     */
+    public function scopeActive(Builder $query): Builder
+    {
+        return $query->where('is_active', true);
+    }
+}
diff --git a/app/Models/WebhookDelivery.php b/app/Models/WebhookDelivery.php
new file mode 100644
index 0000000..7571850
--- /dev/null
+++ b/app/Models/WebhookDelivery.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * One attempt to tell a webhook about one event, and how it went.
+ */
+#[Fillable(['uuid', 'event', 'payload', 'status', 'attempts', 'response_status', 'error', 'delivered_at'])]
+class WebhookDelivery extends Model
+{
+    public const PENDING = 'pending';
+
+    public const SUCCEEDED = 'succeeded';
+
+    public const FAILED = 'failed';
+
+    protected function casts(): array
+    {
+        return [
+            'payload' => 'array',
+            'attempts' => 'integer',
+            'response_status' => 'integer',
+            'delivered_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * @return BelongsTo<Webhook, $this>
+     */
+    public function webhook(): BelongsTo
+    {
+        return $this->belongsTo(Webhook::class);
+    }
+}
diff --git a/app/Policies/WebhookPolicy.php b/app/Policies/WebhookPolicy.php
new file mode 100644
index 0000000..1221c46
--- /dev/null
+++ b/app/Policies/WebhookPolicy.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Policies;
+
+class WebhookPolicy extends ResourcePolicy
+{
+    protected function resource(): string
+    {
+        return 'webhooks';
+    }
+}
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 76f9520..8e05632 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -5,9 +5,13 @@ declare(strict_types=1);
 namespace App\Providers;
 
 use App\Auth\PireonTokenGuard;
+use App\Models\Application;
+use App\Models\ReviewComment;
+use App\Models\Revision;
 use App\Services\Git\GitManager;
 use App\Services\Pireon\PireonClient;
 use App\Services\Pireon\TokenStore;
+use App\Support\Webhooks\Webhooks;
 use Illuminate\Auth\Events\Logout;
 use Illuminate\Cache\RateLimiting\Limit;
 use Illuminate\Database\Eloquent\Model;
@@ -36,6 +40,12 @@ class AppServiceProvider extends ServiceProvider
 
     public function boot(): void
     {
+        // Outgoing webhooks, fed by the records themselves so the panel, the
+        // API and a batch all announce the same things the same way.
+        Application::created(fn (Application $application) => Webhooks::applicationReceived($application));
+        Revision::created(fn (Revision $revision) => Webhooks::revisionRecorded($revision));
+        ReviewComment::created(fn (ReviewComment $comment) => Webhooks::reviewRecorded($comment));
+
         // Backs the "api" guard declared in config/auth.php.
         Auth::viaRequest('pireon', fn (Request $request) => $this->app
             ->make(PireonTokenGuard::class)($request));
diff --git a/app/Providers/AuthServiceProvider.php b/app/Providers/AuthServiceProvider.php
index 34d8edf..2b50eb5 100644
--- a/app/Providers/AuthServiceProvider.php
+++ b/app/Providers/AuthServiceProvider.php
@@ -20,6 +20,7 @@ use App\Models\Talk;
 use App\Models\Technology;
 use App\Models\Testimonial;
 use App\Models\User;
+use App\Models\Webhook;
 use App\Policies\ApplicationPolicy;
 use App\Policies\CallPolicy;
 use App\Policies\CategoryPolicy;
@@ -37,6 +38,7 @@ use App\Policies\TalkPolicy;
 use App\Policies\TechnologyPolicy;
 use App\Policies\TestimonialPolicy;
 use App\Policies\UserPolicy;
+use App\Policies\WebhookPolicy;
 use App\Support\Permissions;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\ServiceProvider;
@@ -63,6 +65,7 @@ class AuthServiceProvider extends ServiceProvider
         Gate::policy(Repository::class, RepositoryPolicy::class);
         Gate::policy(User::class, UserPolicy::class);
         Gate::policy(Role::class, RolePolicy::class);
+        Gate::policy(Webhook::class, WebhookPolicy::class);
 
         // The one place a permission is granted — spatie's own gate check is
         // switched off (config/permission.php) so nothing answers before this.
diff --git a/app/Support/Permissions.php b/app/Support/Permissions.php
index 01bcfbe..a29c1b7 100644
--- a/app/Support/Permissions.php
+++ b/app/Support/Permissions.php
@@ -73,6 +73,10 @@ final class Permissions
         // the provider's rate limit, which is a shared resource.
         'repositories' => ['view_any', 'view', 'create', 'update', 'delete', 'sync'],
 
+        // Where the site tells other systems what happened. A webhook sends
+        // data off this server, so it is an administrator's decision.
+        'webhooks' => ['view_any', 'view', 'create', 'update', 'delete'],
+
         'users' => ['view_any', 'view', 'create', 'update', 'delete'],
         'roles' => ['view_any', 'view', 'create', 'update', 'delete'],
 
diff --git a/app/Support/Webhooks/PublicEndpoint.php b/app/Support/Webhooks/PublicEndpoint.php
new file mode 100644
index 0000000..14a3aaa
--- /dev/null
+++ b/app/Support/Webhooks/PublicEndpoint.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Support\Webhooks;
+
+use App\Services\Media\HostResolver;
+
+/**
+ * Whether a URL is somewhere this server may send a request to: HTTPS, and a
+ * host whose every address is public.
+ *
+ * The same rule the image downloader follows, for the same reason — the
+ * request leaves from inside the stack, and without it a webhook pointed at
+ * `http://postgres:5432` or the cloud's metadata service would be a way of
+ * reaching them.
+ */
+final class PublicEndpoint
+{
+    public function __construct(protected HostResolver $resolver) {}
+
+    /**
+     * The address to connect to, or why not: `https_only`, `unresolvable` or
+     * `private`.
+     *
+     * @return array{0: ?string, 1: ?string} [address, reason]
+     */
+    public function check(string $url): array
+    {
+        $parts = parse_url($url);
+        $host = $parts['host'] ?? null;
+
+        if (($parts['scheme'] ?? null) !== 'https' || blank($host)) {
+            return [null, 'https_only'];
+        }
+
+        $host = trim((string) $host, '[]');
+        $addresses = filter_var($host, FILTER_VALIDATE_IP) ? [$host] : $this->resolver->resolve($host);
+
+        if ($addresses === []) {
+            return [null, 'unresolvable'];
+        }
+
+        foreach ($addresses as $address) {
+            if (! filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_GLOBAL_RANGE)) {
+                return [null, 'private'];
+            }
+        }
+
+        return [$addresses[0], null];
+    }
+}
diff --git a/app/Support/Webhooks/Webhooks.php b/app/Support/Webhooks/Webhooks.php
new file mode 100644
index 0000000..5edd44a
--- /dev/null
+++ b/app/Support/Webhooks/Webhooks.php
@@ -0,0 +1,127 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Support\Webhooks;
+
+use App\Jobs\DeliverWebhook;
+use App\Models\Application;
+use App\Models\ReviewComment;
+use App\Models\Revision;
+use App\Models\Webhook;
+use App\Support\AdminContent;
+use App\Support\ContentTypes;
+use App\Support\SiteUrls;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\Relation;
+use Illuminate\Support\Str;
+
+/**
+ * Turning what happens here into deliveries for whoever listens.
+ *
+ * Fed by model events rather than by the controllers, so a page published from
+ * the panel, the API or a batch is announced the same way.
+ */
+final class Webhooks
+{
+    /**
+     * @param  array<string, mixed>  $data
+     * @param  array<string, mixed>  $personal  Sent only to webhooks that opted into personal data.
+     */
+    public static function dispatch(string $event, array $data, array $personal = []): void
+    {
+        $webhooks = Webhook::query()->active()->get()->filter(fn (Webhook $w) => $w->listensTo($event));
+
+        foreach ($webhooks as $webhook) {
+            $delivery = $webhook->deliveries()->create([
+                'uuid' => (string) Str::uuid(),
+                'event' => $event,
+                'payload' => $webhook->include_personal_data ? [...$data, ...$personal] : $data,
+            ]);
+
+            DeliverWebhook::dispatch($delivery)->afterCommit();
+        }
+    }
+
+    public static function applicationReceived(Application $application): void
+    {
+        self::dispatch('application.received', [
+            'id' => $application->id,
+            'kind' => $application->kind->value,
+            'call_id' => $application->call_id,
+            'subject' => $application->subject(),
+            'locale' => $application->locale,
+            'created_at' => $application->created_at?->toIso8601String(),
+        ], [
+            'name' => $application->name,
+            'email' => $application->email,
+            'organisation' => $application->organisation,
+            'message' => $application->message,
+        ]);
+    }
+
+    /**
+     * Publishing and unpublishing are already told apart by the history, for
+     * every kind of record and from wherever it happened; this listens there.
+     */
+    public static function revisionRecorded(Revision $revision): void
+    {
+        $model = Relation::getMorphedModel($revision->revisionable_type) ?? $revision->revisionable_type;
+        $record = $model::query()->find($revision->revisionable_id);
+
+        if ($record === null) {
+            return;
+        }
+
+        $event = match (true) {
+            $revision->event === 'published' => 'content.published',
+            $revision->event === 'unpublished' => 'content.unpublished',
+            $revision->event === 'created' && method_exists($record, 'isPublishedNow') && $record->isPublishedNow() => 'content.published',
+            default => null,
+        };
+
+        if ($event !== null) {
+            self::dispatch($event, self::describe($record));
+        }
+    }
+
+    public static function reviewRecorded(ReviewComment $comment): void
+    {
+        $event = match ($comment->event->value) {
+            'requested' => 'review.requested',
+            'returned' => 'review.returned',
+            default => null,
+        };
+
+        $record = $comment->reviewable;
+
+        if ($event === null || $record === null) {
+            return;
+        }
+
+        self::dispatch($event, [
+            ...self::describe($record),
+            'by' => $comment->user_name,
+            'note' => $comment->body,
+        ]);
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    protected static function describe(Model $record): array
+    {
+        $type = AdminContent::nameOf($record);
+        $siteType = AdminContent::PREVIEWABLE[$type] ?? null;
+        $locale = (string) config('locales.default');
+
+        return [
+            'type' => $type,
+            'id' => $record->getKey(),
+            'title' => ContentTypes::title($record),
+            'url' => $siteType && method_exists($record, 'getTranslation')
+                ? (SiteUrls::absoluteAlternates($record, $siteType)[$locale] ?? null)
+                : null,
+        ];
+    }
+}
diff --git a/database/factories/WebhookFactory.php b/database/factories/WebhookFactory.php
new file mode 100644
index 0000000..1ea33fd
--- /dev/null
+++ b/database/factories/WebhookFactory.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Factories;
+
+use App\Models\Webhook;
+use Illuminate\Database\Eloquent\Factories\Factory;
+use Illuminate\Support\Str;
+
+/**
+ * @extends Factory<Webhook>
+ */
+class WebhookFactory extends Factory
+{
+    public function definition(): array
+    {
+        return [
+            'name' => $this->faker->words(2, true),
+            'url' => 'https://hooks.example.org/'.Str::random(8),
+            'secret' => Str::random(40),
+            'events' => ['*'],
+            'include_personal_data' => false,
+            'is_active' => true,
+        ];
+    }
+}
diff --git a/database/migrations/2026_10_01_100000_create_webhooks_tables.php b/database/migrations/2026_10_01_100000_create_webhooks_tables.php
new file mode 100644
index 0000000..211bd74
--- /dev/null
+++ b/database/migrations/2026_10_01_100000_create_webhooks_tables.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Outgoing webhooks: telling another system that something happened here —
+ * a submission arrived, a page went live — instead of it having to ask.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('webhooks', function (Blueprint $table): void {
+            $table->id();
+            $table->string('name');
+            $table->string('url', 2048);
+
+            // Signs every delivery. Encrypted at rest: it is a credential.
+            $table->text('secret');
+
+            $table->jsonb('events');
+
+            // Submissions carry names, addresses and messages from people
+            // outside the collective; sending them elsewhere is opted into.
+            $table->boolean('include_personal_data')->default(false);
+
+            $table->boolean('is_active')->default(true);
+            $table->unsignedSmallInteger('consecutive_failures')->default(0);
+            $table->timestamp('last_delivered_at')->nullable();
+            $table->foreignId('created_by')->nullable()->constrained('users')->nullOnDelete();
+            $table->timestamps();
+        });
+
+        Schema::create('webhook_deliveries', function (Blueprint $table): void {
+            $table->id();
+            $table->foreignId('webhook_id')->constrained()->cascadeOnDelete();
+            $table->uuid('uuid')->unique();
+            $table->string('event', 60);
+            $table->jsonb('payload');
+            $table->string('status', 20)->default('pending');
+            $table->unsignedSmallInteger('attempts')->default(0);
+            $table->unsignedSmallInteger('response_status')->nullable();
+            $table->text('error')->nullable();
+            $table->timestamp('delivered_at')->nullable();
+            $table->timestamps();
+
+            $table->index(['webhook_id', 'created_at']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('webhook_deliveries');
+        Schema::dropIfExists('webhooks');
+    }
+};
diff --git a/lang/ca/panel.php b/lang/ca/panel.php
index dece882..f8bdc99 100644
--- a/lang/ca/panel.php
+++ b/lang/ca/panel.php
@@ -161,6 +161,7 @@ return [
             'redirects' => 'Redireccions',
             'pages' => 'Pàgines',
             'categories' => 'Categories',
+            'webhooks' => 'Webhooks',
             'users' => 'Usuaris',
             'roles' => 'Rols',
             'settings' => 'Configuració',
diff --git a/lang/en/panel.php b/lang/en/panel.php
index d12fca1..1024828 100644
--- a/lang/en/panel.php
+++ b/lang/en/panel.php
@@ -161,6 +161,7 @@ return [
             'redirects' => 'Redirects',
             'pages' => 'Pages',
             'categories' => 'Categories',
+            'webhooks' => 'Webhooks',
             'users' => 'Users',
             'roles' => 'Roles',
             'settings' => 'Settings',
diff --git a/lang/es/panel.php b/lang/es/panel.php
index 2ea16fa..9277939 100644
--- a/lang/es/panel.php
+++ b/lang/es/panel.php
@@ -161,6 +161,7 @@ return [
             'redirects' => 'Redirecciones',
             'pages' => 'Páginas',
             'categories' => 'Categorías',
+            'webhooks' => 'Webhooks',
             'users' => 'Usuarios',
             'roles' => 'Roles',
             'settings' => 'Ajustes',
diff --git a/public/openapi.yaml b/public/openapi.yaml
index 0146a98..d78361d 100644
--- a/public/openapi.yaml
+++ b/public/openapi.yaml
@@ -144,6 +144,8 @@ tags:
     description: What is wrong with the site, and what is left to translate
   - name: Batch
     description: Several operations in one, and importing records from JSON or CSV
+  - name: Webhooks
+    description: Telling other systems what happened here
   - name: Users
     description: Local user administration
   - name: Media
@@ -3812,6 +3814,167 @@ paths:
         "403": { $ref: "#/components/responses/Forbidden" }
         "422": { $ref: "#/components/responses/ValidationError" }
 
+  /v1/webhooks:
+    get:
+      tags: [Webhooks]
+      summary: List webhooks
+      parameters:
+        - $ref: "#/components/parameters/PerPage"
+      responses:
+        "200":
+          description: Paginated webhooks
+          content:
+            application/json:
+              schema: { $ref: "#/components/schemas/WebhookCollection" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+    post:
+      tags: [Webhooks]
+      summary: Create a webhook
+      description: |
+        Somewhere to POST to when something happens here. HTTPS to a public
+        address only — checked now and again at every delivery — and redirects are
+        not followed. The `secret` signing the deliveries is generated unless sent,
+        and is in this answer's `secret` once, never again.
+        
+        Each delivery is a JSON body `{id, event, created_at, data}` with headers
+        `X-Webhook-Event`, `X-Webhook-Delivery`, `X-Webhook-Timestamp` and
+        `X-Webhook-Signature`: `sha256=` and the HMAC-SHA256 of
+        `{timestamp}.{body}` with the secret. Failed deliveries are retried five
+        times over about two and a half hours; twenty failures in a row switch the
+        webhook off.
+        
+        Events: `application.received` (its sender's details only with
+        `include_personal_data`), `content.published`, `content.unpublished`,
+        `review.requested`, `review.returned` — or `*`.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema: { $ref: "#/components/schemas/WebhookWrite" }
+      responses:
+        "201":
+          description: Webhook created
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data: { $ref: "#/components/schemas/Webhook" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+        "422": { $ref: "#/components/responses/ValidationError" }
+
+  /v1/webhooks/{webhook}:
+    parameters:
+      - name: webhook
+        in: path
+        required: true
+        schema: { type: integer }
+    get:
+      tags: [Webhooks]
+      summary: Show a webhook
+      responses:
+        "200":
+          description: The webhook
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data: { $ref: "#/components/schemas/Webhook" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+        "404": { description: Not found }
+    patch:
+      tags: [Webhooks]
+      summary: Update a webhook
+      description: "Partial update. `rotate_secret` makes a new secret, in this answer's `secret` once. Switching it back on resets its failure count."
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema: { $ref: "#/components/schemas/WebhookWrite" }
+      responses:
+        "200":
+          description: Webhook updated
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data: { $ref: "#/components/schemas/Webhook" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+        "422": { $ref: "#/components/responses/ValidationError" }
+    delete:
+      tags: [Webhooks]
+      summary: Delete a webhook
+      responses:
+        "204": { description: Deleted }
+        "403": { $ref: "#/components/responses/Forbidden" }
+
+  /v1/webhooks/{webhook}/deliveries:
+    get:
+      tags: [Webhooks]
+      summary: Deliveries of a webhook
+      description: Newest first.
+      parameters:
+        - name: webhook
+          in: path
+          required: true
+          schema: { type: integer }
+        - $ref: "#/components/parameters/PerPage"
+        - name: status
+          in: query
+          description: "`pending`, `succeeded` or `failed`."
+          schema: { type: string }
+      responses:
+        "200":
+          description: Paginated deliveries
+          content:
+            application/json:
+              schema: { $ref: "#/components/schemas/WebhookDeliveryCollection" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+
+  /v1/webhooks/{webhook}/ping:
+    post:
+      tags: [Webhooks]
+      summary: Send a test delivery
+      description: A `ping` event, to check the receiving end.
+      parameters:
+        - name: webhook
+          in: path
+          required: true
+          schema: { type: integer }
+      responses:
+        "202":
+          description: Ping queued
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data: { $ref: "#/components/schemas/WebhookDelivery" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+
+  /v1/webhook-deliveries/{delivery}/redeliver:
+    post:
+      tags: [Webhooks]
+      summary: Send a delivery again
+      description: As a new delivery of the same event and payload.
+      parameters:
+        - name: delivery
+          in: path
+          required: true
+          schema: { type: integer }
+      responses:
+        "202":
+          description: Delivery queued
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data: { $ref: "#/components/schemas/WebhookDelivery" }
+        "403": { $ref: "#/components/responses/Forbidden" }
+
   /v1/media:
     get:
       tags: [Media]
@@ -5640,6 +5803,66 @@ components:
         links: { $ref: "#/components/schemas/PaginationLinks" }
         meta: { $ref: "#/components/schemas/PaginationMeta" }
 
+    Webhook:
+      type: object
+      properties:
+        id: { type: integer }
+        name: { type: string }
+        url: { type: string, format: uri }
+        events: { type: array, items: { type: string } }
+        include_personal_data: { type: boolean }
+        is_active: { type: boolean }
+        consecutive_failures: { type: integer }
+        last_delivered_at: { type: string, format: date-time, nullable: true }
+        created_at: { type: string, format: date-time }
+        updated_at: { type: string, format: date-time }
+
+    WebhookWrite:
+      type: object
+      required: [name, url, events]
+      properties:
+        name: { type: string, maxLength: 120 }
+        url: { type: string, format: uri, description: "HTTPS, to a public address." }
+        events:
+          type: array
+          items: { type: string, enum: ["*", application.received, content.published, content.unpublished, review.requested, review.returned] }
+        secret: { type: string, minLength: 16, description: On creation only; generated when left out. }
+        rotate_secret: { type: boolean, description: On update only. }
+        include_personal_data: { type: boolean, default: false }
+        is_active: { type: boolean }
+
+    WebhookCollection:
+      type: object
+      properties:
+        data:
+          type: array
+          items: { $ref: "#/components/schemas/Webhook" }
+        links: { $ref: "#/components/schemas/PaginationLinks" }
+        meta: { $ref: "#/components/schemas/PaginationMeta" }
+
+    WebhookDelivery:
+      type: object
+      properties:
+        id: { type: integer }
+        uuid: { type: string, description: "Sent as `X-Webhook-Delivery`." }
+        event: { type: string }
+        status: { type: string, enum: [pending, succeeded, failed] }
+        attempts: { type: integer }
+        response_status: { type: integer, nullable: true }
+        error: { type: string, nullable: true }
+        payload: { type: object, additionalProperties: true }
+        delivered_at: { type: string, format: date-time, nullable: true }
+        created_at: { type: string, format: date-time }
+
+    WebhookDeliveryCollection:
+      type: object
+      properties:
+        data:
+          type: array
+          items: { $ref: "#/components/schemas/WebhookDelivery" }
+        links: { $ref: "#/components/schemas/PaginationLinks" }
+        meta: { $ref: "#/components/schemas/PaginationMeta" }
+
     MediaFor:
       type: string
       enum: [pages, technologies, projects, members, clients, testimonials]
diff --git a/routes/api.php b/routes/api.php
index 331442b..f41fe91 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -38,6 +38,7 @@ use App\Http\Controllers\Api\V1\TechnologyController;
 use App\Http\Controllers\Api\V1\TestimonialController;
 use App\Http\Controllers\Api\V1\TokenController;
 use App\Http\Controllers\Api\V1\UserController;
+use App\Http\Controllers\Api\V1\WebhookController;
 use App\Support\AdminContent;
 use Illuminate\Support\Facades\Route;
 
@@ -260,6 +261,12 @@ Route::prefix('v1')->name('api.v1.')->group(function () {
             ->whereIn('resource', array_keys(AdminContent::WITH_HISTORY))
             ->name('import');
 
+        // Telling other systems what happened here.
+        Route::apiResource('webhooks', WebhookController::class);
+        Route::get('webhooks/{webhook}/deliveries', [WebhookController::class, 'deliveries'])->name('webhooks.deliveries');
+        Route::post('webhooks/{webhook}/ping', [WebhookController::class, 'ping'])->name('webhooks.ping');
+        Route::post('webhook-deliveries/{delivery}/redeliver', [WebhookController::class, 'redeliver'])->name('webhook-deliveries.redeliver');
+
         // The panel's health screen, and what is left to translate.
         Route::get('health', [HealthController::class, 'index'])->name('health');
         Route::get('translations/pending', [HealthController::class, 'translations'])->name('translations.pending');
diff --git a/tests/Feature/Api/AdminApiContractTest.php b/tests/Feature/Api/AdminApiContractTest.php
index 1f7c445..3ffad90 100644
--- a/tests/Feature/Api/AdminApiContractTest.php
+++ b/tests/Feature/Api/AdminApiContractTest.php
@@ -22,6 +22,7 @@ use App\Models\Talk;
 use App\Models\Technology;
 use App\Models\Testimonial;
 use App\Models\User;
+use App\Models\Webhook;
 use App\Support\Maintenance;
 use Database\Seeders\RolePermissionSeeder;
 use Illuminate\Foundation\Testing\RefreshDatabase;
@@ -94,6 +95,7 @@ class AdminApiContractTest extends TestCase
             'repositories' => ['path' => '/v1/repositories'],
             'media' => ['path' => '/v1/media'],
             'tokens' => ['path' => '/v1/tokens'],
+            'webhooks' => ['path' => '/v1/webhooks'],
         ];
     }
 
@@ -118,6 +120,8 @@ class AdminApiContractTest extends TestCase
         $media = Media::factory()->create();
         $page->comment('Primera nota', $this->caller);
         ApiToken::issue($this->caller, 'CI', ['pages.*'], now()->addDay());
+        $webhook = Webhook::factory()->create(['is_active' => false]);
+        $webhook->deliveries()->create(['uuid' => 'contract', 'event' => 'ping', 'payload' => []]);
 
         // One request, one documented path — the URL a real caller hits and
         // the path key that describes it, side by side rather than derived
@@ -159,6 +163,9 @@ class AdminApiContractTest extends TestCase
             'medium' => ["/v1/media/{$media->id}", '/v1/media/{media}'],
             'revisions' => ["/v1/projects/{$project->id}/revisions", '/v1/projects/{project}/revisions'],
             'tokens' => ['/v1/tokens', '/v1/tokens'],
+            'webhooks' => ['/v1/webhooks', '/v1/webhooks'],
+            'webhook' => ["/v1/webhooks/{$webhook->id}", '/v1/webhooks/{webhook}'],
+            'deliveries' => ["/v1/webhooks/{$webhook->id}/deliveries", '/v1/webhooks/{webhook}/deliveries'],
             'review thread' => ["/v1/pages/{$page->id}/reviews", '/v1/pages/{page}/reviews'],
             'users' => ['/v1/users', '/v1/users'],
             'user' => ["/v1/users/{$this->caller->id}", '/v1/users/{user}'],
diff --git a/tests/Feature/Api/WebhookTest.php b/tests/Feature/Api/WebhookTest.php
new file mode 100644
index 0000000..2ec8050
--- /dev/null
+++ b/tests/Feature/Api/WebhookTest.php
@@ -0,0 +1,219 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Feature\Api;
+
+use App\Jobs\DeliverWebhook;
+use App\Models\Application;
+use App\Models\Page;
+use App\Models\User;
+use App\Models\Webhook;
+use App\Models\WebhookDelivery;
+use App\Services\Media\HostResolver;
+use Database\Seeders\RolePermissionSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Http\Client\Request as ClientRequest;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Queue;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\FakesPireon;
+use Tests\TestCase;
+
+/**
+ * Outgoing webhooks: managed through the API, fed by what happens to records,
+ * delivered signed and only to public addresses.
+ */
+class WebhookTest extends TestCase
+{
+    use FakesPireon, RefreshDatabase;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->seed(RolePermissionSeeder::class);
+
+        $this->resolving([
+            'hooks.example.org' => ['93.184.216.34'],
+            'internal.example.org' => ['10.0.0.5'],
+        ]);
+    }
+
+    protected function actingWithRole(string $role): User
+    {
+        $user = User::factory()->create();
+        $user->syncRoles([$role]);
+
+        $this->withHeaders($this->apiHeadersFor($user));
+
+        return $user;
+    }
+
+    /**
+     * @param  array<string, array<int, string>>  $answers
+     */
+    protected function resolving(array $answers): void
+    {
+        $this->app->instance(HostResolver::class, new class($answers) extends HostResolver
+        {
+            /** @param array<string, array<int, string>> $answers */
+            public function __construct(private array $answers) {}
+
+            public function resolve(string $host): array
+            {
+                return $this->answers[$host] ?? [];
+            }
+        });
+    }
+
+    #[Test]
+    public function an_admin_registers_a_webhook_and_sees_its_secret_once(): void
+    {
+        $this->actingWithRole('admin');
+
+        $response = $this->postJson('/api/v1/webhooks', [
+            'name' => 'Avisos',
+            'url' => 'https://hooks.example.org/pireon',
+            'events' => ['application.received', 'content.published'],
+        ])
+            ->assertCreated()
+            ->assertJsonPath('data.is_active', true)
+            ->assertJsonMissingPath('data.secret');
+
+        $this->assertSame(40, strlen($response->json('secret')));
+        $this->assertSame($response->json('secret'), Webhook::query()->sole()->secret);
+
+        $this->getJson('/api/v1/webhooks')->assertJsonMissingPath('data.0.secret');
+    }
+
+    #[Test]
+    public function a_webhook_only_points_at_public_https_addresses(): void
+    {
+        $this->actingWithRole('admin');
+
+        foreach (['http://hooks.example.org/x', 'https://internal.example.org/x', 'https://127.0.0.1/x', 'https://nowhere.example.org/x'] as $url) {
+            $this->postJson('/api/v1/webhooks', ['name' => 'X', 'url' => $url, 'events' => ['*']])
+                ->assertUnprocessable()
+                ->assertJsonValidationErrors('url');
+        }
+    }
+
+    #[Test]
+    public function an_editor_cannot_manage_webhooks(): void
+    {
+        $this->actingWithRole('editor');
+
+        $this->getJson('/api/v1/webhooks')->assertForbidden();
+        $this->postJson('/api/v1/webhooks', ['name' => 'X', 'url' => 'https://hooks.example.org/x', 'events' => ['*']])
+            ->assertForbidden();
+    }
+
+    #[Test]
+    public function a_delivery_is_signed_with_the_secret(): void
+    {
+        Http::fake(['hooks.example.org/*' => Http::response('ok')]);
+
+        $webhook = Webhook::factory()->create(['secret' => 'shh-a-secret-of-some-length', 'events' => ['content.published']]);
+
+        Page::factory()->published()->create();
+
+        $delivery = WebhookDelivery::query()->sole();
+
+        $this->assertSame('content.published', $delivery->event);
+        $this->assertSame(WebhookDelivery::SUCCEEDED, $delivery->status);
+        $this->assertNotNull($webhook->fresh()->last_delivered_at);
+
+        Http::assertSent(function (ClientRequest $request) {
+            $timestamp = $request->header('X-Webhook-Timestamp')[0];
+            $expected = 'sha256='.hash_hmac('sha256', $timestamp.'.'.$request->body(), 'shh-a-secret-of-some-length');
+
+            return $request->header('X-Webhook-Signature')[0] === $expected
+                && $request['event'] === 'content.published'
+                && $request['data']['type'] === 'pages';
+        });
+    }
+
+    #[Test]
+    public function personal_data_goes_only_where_it_was_asked_for(): void
+    {
+        Queue::fake();
+
+        $plain = Webhook::factory()->create(['events' => ['application.received']]);
+        $personal = Webhook::factory()->create(['events' => ['*'], 'include_personal_data' => true]);
+
+        Application::factory()->create(['email' => 'ada@example.org']);
+
+        $this->assertArrayNotHasKey('email', $plain->deliveries()->sole()->payload);
+        $this->assertSame('ada@example.org', $personal->deliveries()->sole()->payload['email']);
+
+        Queue::assertPushed(DeliverWebhook::class, 2);
+    }
+
+    #[Test]
+    public function a_webhook_that_keeps_failing_is_switched_off(): void
+    {
+        Http::fake(['hooks.example.org/*' => Http::response('nope', 500)]);
+
+        $webhook = Webhook::factory()->create(['consecutive_failures' => Webhook::MAX_FAILURES - 1]);
+        $delivery = $webhook->deliveries()->create(['uuid' => 'u-1', 'event' => 'ping', 'payload' => []]);
+
+        $job = new DeliverWebhook($delivery);
+        $job->failed(new \RuntimeException('nope'));
+
+        $this->assertSame(WebhookDelivery::FAILED, $delivery->fresh()->status);
+        $this->assertFalse($webhook->fresh()->is_active);
+    }
+
+    #[Test]
+    public function a_name_that_moved_somewhere_private_is_not_delivered_to(): void
+    {
+        Http::fake();
+
+        $webhook = Webhook::factory()->create(['url' => 'https://hooks.example.org/x']);
+        $delivery = $webhook->deliveries()->create(['uuid' => 'u-2', 'event' => 'ping', 'payload' => []]);
+
+        $this->resolving(['hooks.example.org' => ['192.168.1.10']]);
+
+        DeliverWebhook::dispatchSync($delivery);
+
+        Http::assertNothingSent();
+        $this->assertSame(WebhookDelivery::FAILED, $delivery->fresh()->status);
+    }
+
+    #[Test]
+    public function deliveries_are_listed_pinged_and_sent_again(): void
+    {
+        Http::fake(['hooks.example.org/*' => Http::response('ok')]);
+
+        $this->actingWithRole('admin');
+
+        $webhook = Webhook::factory()->create();
+
+        $this->postJson("/api/v1/webhooks/{$webhook->id}/ping")->assertAccepted()->assertJsonPath('data.event', 'ping');
+
+        $id = $this->getJson("/api/v1/webhooks/{$webhook->id}/deliveries")
+            ->assertOk()
+            ->assertJsonPath('data.0.status', 'succeeded')
+            ->json('data.0.id');
+
+        $this->postJson("/api/v1/webhook-deliveries/{$id}/redeliver")->assertAccepted();
+
+        $this->assertSame(2, $webhook->deliveries()->count());
+    }
+
+    #[Test]
+    public function rotating_the_secret_shows_the_new_one_once(): void
+    {
+        $this->actingWithRole('admin');
+
+        $webhook = Webhook::factory()->create(['secret' => 'old-secret-old-secret']);
+
+        $new = $this->patchJson("/api/v1/webhooks/{$webhook->id}", ['rotate_secret' => true])
+            ->assertOk()
+            ->json('secret');
+
+        $this->assertNotSame('old-secret-old-secret', $new);
+        $this->assertSame($new, $webhook->fresh()->secret);
+    }
+}