> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thatsme.com.br/llms.txt
> Use this file to discover all available pages before exploring further.

# Webhooks Overview

> Receive real-time events to automate your workflows with N8N, Make, Zapier, or your own system

Webhooks let That's Me notify your system when something happens — no polling required.

## How it works

1. You register an endpoint URL (your N8N/Make/Zapier webhook URL, or your server)
2. You choose which events to receive
3. When the event occurs, That's Me sends an HTTP POST to your URL within seconds
4. If delivery fails, That's Me retries automatically (3 attempts: 1min, 5min, 30min)

## Supported events

| Event                  | When it fires                                                |
| ---------------------- | ------------------------------------------------------------ |
| `certificate.issued`   | A certificate is emitted to a recipient                      |
| `certificate.accepted` | A recipient accepts their certificate                        |
| `certificate.rejected` | A recipient declines their certificate                       |
| `certificate.expired`  | A certificate passes its expiration date                     |
| `recipient.registered` | A recipient who had a pending certificate creates an account |

## Payload structure

Every webhook delivery has the same envelope:

```json theme={null}
{
  "event": "certificate.issued",
  "created_at": "2026-03-18T10:30:00Z",
  "data": {
    // event-specific fields
  }
}
```

## Verifying signatures

Every request includes the header `X-TM-Signature`.
You should verify this to confirm the request came from That's Me.

See [Verify Signatures](/api/v1/webhooks/verify-signature) for implementation examples.

## Delivery headers

| Header           | Value                                  |
| ---------------- | -------------------------------------- |
| `X-TM-Signature` | `t=timestamp,v1=hmac_sha256_signature` |
| `X-TM-Event`     | Event type (e.g. `certificate.issued`) |
| `X-TM-Delivery`  | Unique delivery UUID                   |
| `Content-Type`   | `application/json`                     |