Karibu Webhooks API - Karibu Docs

A complete reference for the Webhook Management API. These endpoints let you register a callback URL for a developer app, reveal its signing secret, send test events, and inspect, audit, and retry every delivery attempt.

API surface: https://karibu.briq.tz/v1/webhooks/*
Audience: backend engineers wiring Briq delivery events into their product.
Version: v1

The /v1/webhooks/* routes are shared across all channels. The same routes serve sms, voice, otp, whatsapp, and email - you pick the channel with the service_type field when you create a webhook. For the WhatsApp event payloads delivered to these webhooks, see the Karibu WhatsApp API reference.

1. Overview

A webhook is a callback URL Briq POSTs event payloads to when something happens to a message you sent. To receive events you:

Create a webhook for one of your developer apps, choosing a service_type (e.g. whatsapp).
Fetch the signing secret and store it, so you can verify the X-Briq-Signature header on incoming deliveries.
Return 2xx quickly from your endpoint. Non-2xx responses, timeouts, and connection errors are treated as failures and retried.

Each emitted event is persisted as a delivery row and attempted by Briq’s delivery engine. You can list deliveries, view a single delivery’s full payload, see aggregate stats, and manually retry failed deliveries.

One webhook per app per service_type. Each developer app may have only one webhook for a given channel. Creating a second whatsapp webhook for the same app returns 400. Delete the existing one first to free the slot.

2. Authentication & host

Base URL

https://karibu.briq.tz

Required headers

Header	Required	Notes
`X-API-Key`	yes	Your developer API key. Must be active and not expired. Missing/invalid -> 401.
`Host`	yes	Must be `karibu.briq.tz`. Other hosts are rejected with 403 outside `development`/`sandbox` environments.
`Content-Type`	yes (POST/PATCH)	`application/json`

All webhooks you create, read, or manage are scoped to your developer apps (resolved from the API key). A webhook owned by another user is invisible to you - reads return 404.

Response shape

These endpoints return bare resource objects (no success/data/errors envelope). Errors use the raw framework shape:

{ "detail": "Webhook not found" }

Treat any non-2xx status as a failure and read detail for the reason.

3. Endpoint reference

3.1 `POST /v1/webhooks/` - Create a webhook

Registers a callback URL for a developer app. The authenticated user must own the app referenced by app_id. A signing secret is generated automatically at creation; retrieve it separately via the secret endpoint. Body:

Field	Type	Required	Description
`app_id`	UUID	yes	ID of the developer app that will receive events. Must be an app you own.
`service_type`	string	yes	Channel. One of `sms`, `voice`, `otp`, `whatsapp`, `email` (regex `^(sms\|voice\|otp\|whatsapp\|email)$`).
`url`	string (HTTPS URL)	yes	Public HTTPS URL we POST event payloads to. Must be reachable and return `2xx` on success.

Success - 201 Created:

{
  "webhook_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "app_id": "550e8400-e29b-41d4-a716-446655440000",
  "service_type": "whatsapp",
  "url": "https://api.yourdomain.com/briq/webhooks/whatsapp",
  "secret_token": "***",
  "created_at": "2026-03-15T12:00:00.000000",
  "updated_at": "2026-03-15T12:00:00.000000"
}

The returned secret_token is always masked as ***. Fetch the real value with the secret endpoint.

HTTP	Cause
400	App not found, not owned by you, or a webhook for this app + `service_type` already exists.
422	Invalid body (bad `service_type`, non-HTTPS/malformed `url`, non-UUID `app_id`).

curl -X POST "https://karibu.briq.tz/v1/webhooks/" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "app_id": "550e8400-e29b-41d4-a716-446655440000",
    "service_type": "whatsapp",
    "url": "https://api.yourdomain.com/briq/webhooks/whatsapp"
  }'

import requests

resp = requests.post(
    "https://karibu.briq.tz/v1/webhooks/",
    headers={"X-API-Key": "YOUR_API_KEY", "Content-Type": "application/json"},
    json={
        "app_id": "550e8400-e29b-41d4-a716-446655440000",
        "service_type": "whatsapp",
        "url": "https://api.yourdomain.com/briq/webhooks/whatsapp",
    },
    timeout=15,
)
print(resp.status_code, resp.json())

const resp = await fetch("https://karibu.briq.tz/v1/webhooks/", {
  method: "POST",
  headers: { "X-API-Key": "YOUR_API_KEY", "Content-Type": "application/json" },
  body: JSON.stringify({
    app_id: "550e8400-e29b-41d4-a716-446655440000",
    service_type: "whatsapp",
    url: "https://api.yourdomain.com/briq/webhooks/whatsapp",
  }),
});
console.log(resp.status, await resp.json());

<?php
$ch = curl_init("https://karibu.briq.tz/v1/webhooks/");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST           => true,
    CURLOPT_HTTPHEADER     => ["X-API-Key: YOUR_API_KEY", "Content-Type: application/json"],
    CURLOPT_POSTFIELDS     => json_encode([
        "app_id"       => "550e8400-e29b-41d4-a716-446655440000",
        "service_type" => "whatsapp",
        "url"          => "https://api.yourdomain.com/briq/webhooks/whatsapp",
    ]),
]);
echo curl_exec($ch);
curl_close($ch);

3.2 `GET /v1/webhooks/all` - List all webhooks for the user

Returns every webhook belonging to the authenticated user, across all developer apps and channels. Returns an empty array [] if you have none (not an error). Success - 200 OK: an array of webhook objects (same shape as the create response).

curl "https://karibu.briq.tz/v1/webhooks/all" \
  -H "X-API-Key: YOUR_API_KEY"

3.3 `GET /v1/webhooks/app/{app_id}` - List webhooks for an app

Lists the webhooks registered for a single developer app you own. If the app is not yours or has no webhooks, an empty array [] is returned. Path parameter: app_id (string, required).

curl "https://karibu.briq.tz/v1/webhooks/app/550e8400-e29b-41d4-a716-446655440000" \
  -H "X-API-Key: YOUR_API_KEY"

3.4 `GET /v1/webhooks/{webhook_id}` - Get a webhook

Fetches a single webhook by ID. Must belong to one of your apps, otherwise 404. Path parameter: webhook_id (string, required). Success - 200 OK: a single webhook object.

HTTP	Cause
404	Webhook not found or not owned by one of your apps (`{"detail": "Webhook not found"}`).

curl "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890" \
  -H "X-API-Key: YOUR_API_KEY"

3.5 `PATCH /v1/webhooks/{webhook_id}` - Update a webhook

Updates a webhook’s url and/or service_type. Both fields are optional; send only what you want to change. Body:

Field	Type	Required	Description
`service_type`	string	no	New channel (same enum as create).
`url`	string (HTTPS URL)	no	New public HTTPS callback URL.

The signing secret is fixed at creation and is not affected by an update. Existing receivers keep verifying X-Briq-Signature with the same secret.

HTTP	Cause
404	Webhook not found, not owned by one of your apps, or the update failed.
422	Invalid body (bad `service_type` or malformed/non-HTTPS `url`).

curl -X PATCH "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "url": "https://api.yourdomain.com/briq/webhooks/whatsapp-v2" }'

3.6 `DELETE /v1/webhooks/{webhook_id}` - Delete a webhook

Permanently removes a webhook. After deletion, Briq stops sending events to its URL, and the per-service_type uniqueness slot is freed (you can create a new one for the same app + channel). Success - 204 No Content (no body).

HTTP	Cause
404	Webhook not found or not owned by one of your apps.

curl -X DELETE "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890" \
  -H "X-API-Key: YOUR_API_KEY"

3.7 `GET /v1/webhooks/{webhook_id}/secret` - Reveal signing secret

Returns the webhook’s signing secret in plaintext. Use it to verify the X-Briq-Signature header (HMAC-SHA256 of the raw request body) on incoming deliveries. Success - 200 OK:

{ "secret_token": "whsec_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" }

HTTP	Cause
404	Webhook not found / not owned (`{"detail": "Webhook not found"}`) or webhook has no secret set (`{"detail": "Webhook has no secret"}`).

Treat the secret as a credential. Store it in a secret manager or environment variable; never expose it client-side. The full HMAC verification procedure (header format, raw-body handling, sample code) is documented in the WhatsApp reference -> Verifying the signature.

curl "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890/secret" \
  -H "X-API-Key: YOUR_API_KEY"

3.8 `POST /v1/webhooks/{webhook_id}/test` - Send a test event

Enqueues a synthetic test delivery so you can confirm your endpoint is reachable and your signature verification works. Returns an event_id you can use to find the delivery. Success - 202 Accepted:

{
  "event_id": "test_9f8e7d6c5b4a3210",
  "message": "Test event enqueued. Poll GET /{webhook_id}/deliveries to check status."
}

Synthetic sms.sent payload quirk. The test endpoint currently emits a synthetic sms.sent event regardless of the webhook’s service_type. For a whatsapp webhook this still verifies connectivity and signature verification, but the body is not a faithful WhatsApp event payload. A native whatsapp.* test event is upcoming.

curl -X POST "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890/test" \
  -H "X-API-Key: YOUR_API_KEY"

3.9 `GET /v1/webhooks/{webhook_id}/deliveries` - List delivery attempts

Returns a paginated, filterable list of delivery attempts for a webhook so you can audit what was sent, the HTTP status received, and any errors. Query parameters:

Field	Type	Required	Description
`status`	string	no	`pending`, `delivered`, `failed`, or `exhausted`.
`event_name`	string	no	Filter by event name (e.g. `briq.message.delivered`).
`from_created_at`	datetime (ISO 8601)	no	Created on or after this timestamp.
`to_created_at`	datetime (ISO 8601)	no	Created on or before this timestamp.
`message_id`	string	no	Filter by message ID.
`limit`	int	no	Page size, `1`-`100`. Default `50`.
`offset`	int	no	Items to skip, `>= 0`. Default `0`.

Success - 200 OK:

{
  "items": [
    {
      "id": "d1e2f3a4-b5c6-7890-abcd-ef0123456789",
      "event_id": "evt_0a1b2c3d4e5f",
      "webhook_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "app_id": "550e8400-e29b-41d4-a716-446655440000",
      "service_type": "whatsapp",
      "event_name": "briq.message.delivered",
      "status": "failed",
      "attempt_count": 3,
      "max_attempts": 5,
      "last_status_code": 500,
      "last_error": "Internal Server Error",
      "next_attempt_at": "2026-03-15T12:10:00.000000",
      "created_at": "2026-03-15T12:00:00.000000",
      "updated_at": "2026-03-15T12:05:00.000000"
    }
  ],
  "total": 1,
  "limit": 20,
  "offset": 0
}

Delivery summary fields

Field	Type	Description
`id`	string	Unique delivery id. Use it with the get-one-delivery endpoint.
`event_id`	string	Event id from the envelope (idempotency).
`webhook_id`	string	Target webhook config id.
`app_id`	string \| null	Developer app id.
`service_type`	string	Channel: `sms`, `email`, `voice`, `otp`, `whatsapp`.
`event_name`	string	Event name.
`status`	string	`pending` \| `delivered` \| `failed` \| `exhausted`.
`attempt_count`	int	Number of delivery attempts made.
`max_attempts`	int	Maximum attempts configured.
`last_status_code`	int \| null	HTTP status from the last attempt.
`last_error`	string \| null	Last error message if failed.
`next_attempt_at`	datetime \| null	When the next attempt is due.
`created_at` / `updated_at`	datetime	Timestamps.

List items omit the url and payload fields. Use get-one-delivery for the full payload snapshot.

curl "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890/deliveries?status=failed&limit=20" \
  -H "X-API-Key: YOUR_API_KEY"

3.10 `GET /v1/webhooks/{webhook_id}/stats` - Delivery stats

Returns aggregated delivery outcome counts over a time window, broken down by status and event name. Useful for monitoring health and spotting failure spikes. Query parameter: since (datetime, ISO 8601, optional). Defaults to 7 days ago. Success - 200 OK:

{
  "webhook_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "since": "2026-03-01T00:00:00.000000",
  "total": 124,
  "by_status": { "delivered": 118, "failed": 4, "exhausted": 1, "pending": 1 },
  "by_event": { "briq.message.delivered": 100, "briq.message.failed": 24 }
}

curl "https://karibu.briq.tz/v1/webhooks/a1b2c3d4-e5f6-7890-abcd-ef1234567890/stats?since=2026-03-01T00:00:00Z" \
  -H "X-API-Key: YOUR_API_KEY"

3.11 `GET /v1/webhooks/deliveries/{delivery_id}` - Get one delivery

Returns the full detail for a single delivery, including the target url and the payload snapshot of the JSON body that was sent (or is queued to send). Path parameter: delivery_id (string, required) - the id from a delivery list item. Success - 200 OK: every delivery-summary field plus:

Field	Type	Description
`url`	string	Callback URL this delivery targets.
`payload`	object \| null	Snapshot of the JSON body sent or to be sent.

HTTP	Cause
404	Delivery not found or not owned by one of your apps.

curl "https://karibu.briq.tz/v1/webhooks/deliveries/d1e2f3a4-b5c6-7890-abcd-ef0123456789" \
  -H "X-API-Key: YOUR_API_KEY"

3.12 `POST /v1/webhooks/deliveries/{delivery_id}/retry` - Retry a delivery

Schedules a previously failed delivery for another attempt. Only deliveries with status failed or exhausted can be retried. Success - 200 OK: the updated delivery detail (typically status: "pending" with next_attempt_at set).

HTTP	Cause
404	Delivery not found or not owned by one of your apps.
422	Delivery is not in a retryable state (status is not `failed` or `exhausted`).

Retry requeues the same delivery row - it does not create a duplicate. The same id is updated and re-attempted.

curl -X POST "https://karibu.briq.tz/v1/webhooks/deliveries/d1e2f3a4-b5c6-7890-abcd-ef0123456789/retry" \
  -H "X-API-Key: YOUR_API_KEY"

4. What your endpoint must return

Your HTTP response	Briq behavior
Any 2xx	Treated as success; Briq stops retrying this attempt.
Non-2xx, timeout, or connection failure	Treated as failure; retried with backoff up to `max_attempts`.

The response body is not interpreted for success - 204 No Content or 200 OK with an empty body is sufficient. Respond quickly (acknowledge, then process asynchronously) so your endpoint isn’t marked as failing under load.

Karibu WhatsApp API - WhatsApp send/read endpoints and the whatsapp.sent/delivered/read/failed event payloads delivered to these webhooks.
Webhooks (subscriber guide) - what your HTTPS endpoint receives, signature verification, idempotency, and retry behavior.
Developer Apps - API keys and app configuration.

​1. Overview

​2. Authentication & host

​Base URL

​Required headers

​Response shape

​3. Endpoint reference

​3.1 POST /v1/webhooks/ - Create a webhook

​3.2 GET /v1/webhooks/all - List all webhooks for the user

​3.3 GET /v1/webhooks/app/{app_id} - List webhooks for an app

​3.4 GET /v1/webhooks/{webhook_id} - Get a webhook

​3.5 PATCH /v1/webhooks/{webhook_id} - Update a webhook

​3.6 DELETE /v1/webhooks/{webhook_id} - Delete a webhook

​3.7 GET /v1/webhooks/{webhook_id}/secret - Reveal signing secret

​3.8 POST /v1/webhooks/{webhook_id}/test - Send a test event

​3.9 GET /v1/webhooks/{webhook_id}/deliveries - List delivery attempts

​3.10 GET /v1/webhooks/{webhook_id}/stats - Delivery stats

​3.11 GET /v1/webhooks/deliveries/{delivery_id} - Get one delivery

​3.12 POST /v1/webhooks/deliveries/{delivery_id}/retry - Retry a delivery

​4. What your endpoint must return

​5. Related references

1. Overview

2. Authentication & host

Base URL

Required headers

Response shape

3. Endpoint reference

3.1 `POST /v1/webhooks/` - Create a webhook

3.2 `GET /v1/webhooks/all` - List all webhooks for the user

3.3 `GET /v1/webhooks/app/{app_id}` - List webhooks for an app

3.4 `GET /v1/webhooks/{webhook_id}` - Get a webhook

3.5 `PATCH /v1/webhooks/{webhook_id}` - Update a webhook

3.6 `DELETE /v1/webhooks/{webhook_id}` - Delete a webhook

3.7 `GET /v1/webhooks/{webhook_id}/secret` - Reveal signing secret

3.8 `POST /v1/webhooks/{webhook_id}/test` - Send a test event

3.9 `GET /v1/webhooks/{webhook_id}/deliveries` - List delivery attempts

3.10 `GET /v1/webhooks/{webhook_id}/stats` - Delivery stats

3.11 `GET /v1/webhooks/deliveries/{delivery_id}` - Get one delivery

3.12 `POST /v1/webhooks/deliveries/{delivery_id}/retry` - Retry a delivery

4. What your endpoint must return

5. Related references