Webhooks

Overview

Webhooks let you receive real-time notifications when events happen in Magpipe. Instead of polling the API for updates, Magpipe sends a POST request to your server with event data as soon as the event occurs — voice calls completing, SMS messages arriving or being sent, and chat sessions ending.

Webhooks and API configuration — Generate API keys and configure webhook URLs in Settings

API settings scroll — Scroll through API keys, webhook payload reference, and MCP config

Each API key can have its own webhook URL, so you can route events to different servers for different integrations.

Setup

Go to Settings → API
Click Generate New Key (or Edit on an existing key)
Enter your webhook URL (e.g., https://your-server.com/webhook)
Save — a signing secret is automatically generated

You can add or change the webhook URL on any existing API key at any time. The signing secret is generated automatically when you first set a URL.

Per-number scoping

A key scoped to specific service numbers (set up when those numbers are assigned to its agents) receives number-bound events (sms.received, sms.sent, call.completed) only for its own numbers — so multiple integrations on one account stay isolated. A key with no number scoping receives events for every number, but only when it’s the only webhook key on the account; on an account with multiple webhook keys an unscoped key receives nothing until it’s scoped (so a new key can’t accidentally pick up another integration’s events). Events without a service number (e.g. chat.session.completed) are always delivered.

Events

`call.completed`

Fired when a call ends and all post-processing (transcript, summary, data extraction) is complete.

{
  "event": "call.completed",
  "timestamp": "2026-02-18T15:30:45.123456Z",
  "data": {
    "call_record_id": "550e8400-e29b-41d4-a716-446655440000",
    "direction": "inbound",
    "caller_number": "+16045551234",
    "service_number": "+16042101966",
    "agent_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "agent_name": "Reception Agent",
    "duration_seconds": 127,
    "transcript": "Agent: Hello, thanks for calling...\n\nCaller: Hi, I'd like to...",
    "summary": "Caller requested to schedule a consultation for next week.",
    "extracted_data": {
      "caller_name": "John Smith",
      "purpose": "consultation",
      "preferred_date": "next Tuesday"
    },
    "status": "completed"
  }
}

Field Reference

Field	Type	Description
`call_record_id`	string	Unique ID for the call record
`direction`	string	`inbound` or `outbound`
`caller_number`	string	Phone number of the caller (E.164 format)
`service_number`	string	Your Magpipe phone number that handled the call
`agent_id`	string	ID of the agent that handled the call
`agent_name`	string	Name of the agent
`duration_seconds`	integer	Call duration in seconds
`transcript`	string \| null	Full call transcript. `null` if PII storage is disabled.
`summary`	string \| null	AI-generated call summary. `null` if the call was too short.
`extracted_data`	object \| null	Data extracted via dynamic variables. `null` if not configured on the agent.
`status`	string	Always `completed`

`sms.received`

Fired when an inbound SMS lands on one of your Magpipe service numbers.

{
  "event": "sms.received",
  "timestamp": "2026-05-01T22:30:45.123Z",
  "data": {
    "sms_message_id": "550e8400-e29b-41d4-a716-446655440000",
    "agent_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "service_number": "+15551234567",
    "from_number": "+15559876543",
    "to_number": "+15551234567",
    "body": "Hi, can you tell me about pricing?",
    "media_urls": [],
    "received_at": "2026-05-01T22:30:44.000Z"
  }
}

Field Reference

Field	Type	Description
`sms_message_id`	string \| null	Unique ID of the stored SMS row. `null` only on rare paths where no row was persisted.
`agent_id`	string \| null	ID of the agent assigned to the receiving number. `null` if no agent is assigned.
`service_number`	string	Your Magpipe phone number that received the SMS (E.164).
`from_number`	string	Sender’s phone number (E.164).
`to_number`	string	Always equal to `service_number` for inbound.
`body`	string \| null	Message body. Respects the agent’s PII storage mode — `null` if `disabled`, redacted if `redacted`.
`media_urls`	array	MMS media as time-limited signed URLs (valid ~7 days; the inbox re-signs from a durable path after expiry) — Magpipe re-hosts the carrier media so you can fetch it directly with a plain `GET`, no credentials. Download promptly; don’t hot-link long-term. Empty array if no media.
`received_at`	string	ISO 8601 timestamp when Magpipe ingested the SMS.

sms.received does not fire for content-loop traps (the same message repeated 3+ times by the same sender — Magpipe stops responding to break the loop). It still fires for opt-out/opt-in replies so you can track them.

`sms.sent`

Fired when an outbound SMS is dispatched. Covers manual sends from the portal, AI-generated agent replies, notification SMS, and API-initiated sends.

{
  "event": "sms.sent",
  "timestamp": "2026-05-01T22:30:45.123Z",
  "data": {
    "sms_message_id": "9c4f8b0e-3d2a-4f1e-b6c5-8a7f3e2d1b0c",
    "agent_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "service_number": "+15551234567",
    "from_number": "+15551234567",
    "to_number": "+15559876543",
    "body": "Thanks for reaching out — here's the pricing info you asked about...",
    "trigger": "agent_reply",
    "sent_at": "2026-05-01T22:30:45.000Z"
  }
}

Field Reference

Field	Type	Description
`sms_message_id`	string \| null	Unique ID of the stored SMS row. `null` for notification SMS (no row is persisted today).
`notification_id`	string	Present only when `trigger` is `notification`. Use this for customer-side dedup on the notification path.
`agent_id`	string \| null	ID of the agent that originated the message, or `null` for portal/manual sends.
`service_number`	string	The number the SMS was sent from (E.164).
`from_number`	string	Same as `service_number`.
`to_number`	string	Recipient’s phone number (E.164).
`body`	string \| null	Message body. Respects PII storage mode same as `sms.received`.
`trigger`	string	Why the SMS was sent — one of: `manual` (portal), `agent_reply` (AI auto-reply), `notification` (Magpipe notifying the owner of an inbound), `api` (API/MCP send).
`sent_at`	string	ISO 8601 timestamp when Magpipe handed the SMS to the carrier.

`whatsapp.received`

Fired when an inbound WhatsApp message lands on a number whose WhatsApp account has a webhook_url set. This is a per-WhatsApp-number forward configured on the WhatsApp account (not the API-key webhook above), and it routes raw inbound messages to your endpoint instead of the AI agent replying.

{
  "event": "whatsapp.received",
  "conversation_id": "8f3a2b1c-...",
  "from": "16045551234",
  "content": "footing rebar done",
  "media": [
    { "url": "https://...signed-7d...", "mime_type": "image/jpeg", "caption": "..." }
  ],
  "phone_number_id": "1059545750567735",
  "whatsapp_account_id": "...",
  "message_id": "wamid.ABC...",
  "context": { "in_reply_to_message_id": "wamid.XYZ..." },
  "metadata": { "schedule_id": "..." },
  "timestamp": "1718000000",
  "contact_name": "Erik"
}

Field Reference

Field	Type	Description
`conversation_id`	string \| null	Stable thread id for this contact × number.
`from`	string	Sender’s WhatsApp number (bare digits).
`content`	string	Message text, or the caption (`[image]` if a photo with no caption).
`media`	array	Inbound photos as `{ url, mime_type, caption }` — `url` is a time-limited signed URL (~7 days). Empty if none.
`message_id`	string	The inbound WhatsApp message id (wamid).
`context`	object \| null	`{ in_reply_to_message_id }` when the sender replied to one of your outbound messages.
`metadata`	object \| null	The `metadata` you attached to the originating outbound send, echoed back for attribution.
`contact_name`	string \| null	WhatsApp profile name, if available.

whatsapp.received is delivered to the WhatsApp account’s webhook_url and is not HMAC-signed (no x-magpipe-signature). Setting a WhatsApp account’s webhook_url suppresses the AI agent for that number — use one model or the other.

`chat.session.completed`

Fired when a website chat session ends — either when the visitor explicitly closes the widget or after 30 minutes of inactivity.

{
  "event": "chat.session.completed",
  "timestamp": "2026-05-01T22:30:45.123Z",
  "data": {
    "chat_session_id": "550e8400-e29b-41d4-a716-446655440000",
    "widget_id": "8f7e6d5c-4b3a-2918-7065-4f3e2d1c0b9a",
    "agent_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "visitor_id": "v_a1b2c3d4",
    "started_at": "2026-05-01T22:00:12.000Z",
    "ended_at": "2026-05-01T22:30:00.000Z",
    "message_count": 14,
    "transcript": [
      { "role": "visitor", "content": "Hi", "timestamp": "2026-05-01T22:00:14.000Z" },
      { "role": "agent",   "content": "Hello! How can I help?", "timestamp": "2026-05-01T22:00:15.000Z" }
    ],
    "summary": "Visitor asked about senior living options in Edmonton...",
    "extracted_data": {
      "location": "Edmonton",
      "care_needs": "memory care"
    },
    "ended_reason": "inactivity"
  }
}

Field Reference

Field	Type	Description
`chat_session_id`	string	Unique ID of the chat session.
`widget_id`	string	The widget the session belonged to.
`agent_id`	string \| null	ID of the agent that handled the session.
`visitor_id`	string	Visitor identifier (cookie or signed-in user ID).
`started_at`	string	ISO 8601 timestamp when the first message was sent.
`ended_at`	string	ISO 8601 timestamp when the session ended.
`message_count`	integer	Total messages exchanged.
`transcript`	array	Full ordered transcript: `{role, content, timestamp}` per message. `role` is `visitor`, `agent`, or `system`.
`summary`	string \| null	AI-generated 3-sentence summary. `null` when the visitor said too little to summarise.
`extracted_data`	object \| null	Data extracted via dynamic variables (mirrors `call.completed`). `null` if extraction yielded nothing.
`ended_reason`	string	One of `visitor_closed`, `inactivity`, `manual_close`.

Verifying Signatures

Every webhook request includes an x-magpipe-signature header containing an HMAC-SHA256 signature of the request body, signed with your webhook signing secret. Always verify the signature to confirm the request came from Magpipe.

Verification Examples

const crypto = require('crypto');

function verifyWebhook(body, signature, secret) {
  const expected = 'sha256=' + crypto
    .createHmac('sha256', secret)
    .update(body)
    .digest('hex');
  return crypto.timingSafeEqual(
    Buffer.from(signature),
    Buffer.from(expected)
  );
}

// In your Express handler:
app.post('/webhook', express.raw({ type: 'application/json' }), (req, res) => {
  const signature = req.headers['x-magpipe-signature'];
  const isValid = verifyWebhook(req.body, signature, process.env.MAGPIPE_WEBHOOK_SECRET);

  if (!isValid) {
    return res.status(401).send('Invalid signature');
  }

  const event = JSON.parse(req.body);
  console.log('Received:', event.event, event.data.call_record_id);

  res.status(200).send('OK');
});

import hmac
import hashlib

def verify_webhook(body: bytes, signature: str, secret: str) -> bool:
    expected = 'sha256=' + hmac.new(
        secret.encode('utf-8'),
        body,
        hashlib.sha256
    ).hexdigest()
    return hmac.compare_digest(signature, expected)

# In your Flask handler:
@app.route('/webhook', methods=['POST'])
def handle_webhook():
    signature = request.headers.get('x-magpipe-signature', '')
    is_valid = verify_webhook(request.data, signature, os.environ['MAGPIPE_WEBHOOK_SECRET'])

    if not is_valid:
        return 'Invalid signature', 401

    event = request.json
    print(f"Received: {event['event']} {event['data']['call_record_id']}")

    return 'OK', 200

require 'openssl'

def verify_webhook(body, signature, secret)
  expected = 'sha256=' + OpenSSL::HMAC.hexdigest('SHA256', secret, body)
  Rack::Utils.secure_compare(signature, expected)
end

Signature Format

The x-magpipe-signature header value follows this format:

sha256=5d7e8b3c1a9f4e2d6b0c8a7f3e5d9b1c4a6f8e2d7b0c3a5f9e1d4b7c0a3f6e

Compute HMAC-SHA256(webhook_secret, raw_request_body) and compare the hex digest to the value after sha256=.

Always use a timing-safe comparison function (e.g., crypto.timingSafeEqual in Node.js, hmac.compare_digest in Python) to prevent timing attacks.

Delivery Details

Property	Value
Method	`POST`
Content-Type	`application/json`
Timeout	10 seconds per attempt
Retries	Up to 4 (5 total attempts) on transient failure
Backoff	5s → 30s → 2 min → 10 min (with ±25% jitter)
Stop signal	Return `410 Gone` to tell Magpipe never to retry

All delivery attempts are logged in the webhook_deliveries table for debugging, including the HTTP status code, response body, attempt number, and duration.

Retry Policy

Magpipe retries delivery on:

Network errors and timeouts
HTTP 408 Request Timeout
HTTP 429 Too Many Requests
HTTP 5xx errors

Magpipe does not retry on:

2xx and 3xx responses (treated as success)
410 Gone — stops retries permanently for this delivery
Other 4xx responses — treated as a permanent client error and sent to the dead-letter queue immediately for replay

Idempotency

Because retries can deliver the same event more than once, your handler should be idempotent. Dedupe on the event-specific ID:

Event	Dedup key
`call.completed`	`data.call_record_id`
`sms.received`	`data.sms_message_id`
`sms.sent`	`data.sms_message_id` (when present), or `data.notification_id` for `trigger: "notification"`
`chat.session.completed`	`data.chat_session_id`

A simple INSERT ... ON CONFLICT DO NOTHING keyed on the dedup column on your side is enough.

Dead-letter queue

If all retries fail (or a non-retryable 4xx is returned), the event is moved to the webhook_dead_letter table. It can be inspected via the same database row-level visibility that exposes webhook_deliveries, and replayed manually via the Replay API below.

Replay API

POST /functions/v1/replay-webhook-delivery Authenticate with your mgp_ API key. Two modes are supported:

Replay one delivery

curl -X POST https://your-project.supabase.co/functions/v1/replay-webhook-delivery \
  -H "Authorization: Bearer mgp_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{ "delivery_id": "9c4f8b0e-3d2a-4f1e-b6c5-8a7f3e2d1b0c" }'

delivery_id may reference a row in webhook_deliveries or webhook_dead_letter. The original event envelope is sent verbatim — same body, same HMAC. The replayed delivery is logged as a fresh attempt 1, separate from any prior retry chain.

Replay a window

curl -X POST https://your-project.supabase.co/functions/v1/replay-webhook-delivery \
  -H "Authorization: Bearer mgp_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "event_type": "sms.received",
    "from": "2026-05-01T00:00:00Z",
    "to":   "2026-05-01T23:59:59Z"
  }'

Replays every successful delivery of event_type in the time window (deduplicated, so multi-attempt deliveries replay once). Capped at 500 events per call. Use this to backfill after your endpoint has had downtime.

Replays are scoped to deliveries that belong to one of your api_keys. You can never replay another tenant’s events.

Managing Webhook Secrets

A signing secret (whsec_...) is auto-generated when you first set a webhook URL on an API key
The secret is visible in Settings → API — click Edit on any key with a webhook URL
Clearing the webhook URL also clears the signing secret
Setting a new webhook URL on a key that already has a secret keeps the existing secret

Testing

Use a service like webhook.site to test your webhook integration:

Go to webhook.site and copy the unique URL
Set it as your webhook URL in Settings → API
Make a test call to any of your Magpipe phone numbers
After the call completes, check webhook.site for the delivered payload

Get Started

Features

Guides

Overview

Setup

Per-number scoping

Events

`call.completed`

Field Reference

`sms.received`

Field Reference

`sms.sent`

Field Reference

`whatsapp.received`

Field Reference

`chat.session.completed`

Field Reference

Verifying Signatures

Verification Examples

Signature Format

Delivery Details

Retry Policy

Idempotency

Dead-letter queue

Replay API

Replay one delivery

Replay a window

Managing Webhook Secrets

Testing

​Overview

​Setup

​Per-number scoping

​Events

​call.completed

​Field Reference

​sms.received

​Field Reference

​sms.sent

​Field Reference

​whatsapp.received

​Field Reference

​chat.session.completed

​Field Reference

​Verifying Signatures

​Verification Examples

​Signature Format

​Delivery Details

​Retry Policy

​Idempotency

​Dead-letter queue

​Replay API

​Replay one delivery

​Replay a window

​Managing Webhook Secrets

​Testing

Overview

Setup

Per-number scoping

Events

`call.completed`

Field Reference

`sms.received`

Field Reference

`sms.sent`

Field Reference

`whatsapp.received`

Field Reference

`chat.session.completed`

Field Reference

Verifying Signatures

Verification Examples

Signature Format

Delivery Details

Retry Policy

Idempotency

Dead-letter queue

Replay API

Replay one delivery

Replay a window

Managing Webhook Secrets

Testing