# Replay a webhook delivery

Replay a webhook delivery in the authenticated project environment.

## Requirements

A secret API key with `webhooks:write`. Resources are restricted to the key's project and environment.

## Path parameters

| Name | Type | Required / default | Description |
| --- | --- | --- | --- |
| endpointId | string | Required | ID returned when creating the webhook. |
| deliveryId | string | Required | ID of a delivery for this endpoint. |

## Query parameters

| Name | Type | Required / default | Description |
| --- | --- | --- | --- |
| projectId | string | Key project | Must match the key's project. |
| environmentId | string | Key environment | Must match the key's environment. |

## Request body

| Name | Type | Required / default | Description |
| --- | --- | --- | --- |
| expectedReplayCount | integer | Required | The current replayCount, from 0 to 99. |

## Example

Set `RELAYRTC_API_URL` to your API base including `/v1`, such as `http://localhost:8082/v1`.

```bash
curl -X POST "$RELAYRTC_API_URL/webhooks/webhook_example/deliveries/delivery_example/replay" \
  -H "Authorization: Bearer $RELAYRTC_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"expectedReplayCount":0}'
```

## Response

`202` with the queued delivery, including its incremented `replayCount`.

```json
{
  "id": "delivery_example",
  "endpointId": "webhook_example",
  "eventId": "event_example",
  "projectId": "project_example",
  "environmentId": "environment_example",
  "url": "https://your-app.example/webhooks/relayrtc",
  "status": "pending",
  "attemptCount": 0,
  "runAttemptCount": 0,
  "replayCount": 1,
  "lastError": null,
  "nextAttemptAt": "2026-01-01T12:00:00.000Z",
  "deliveredAt": null,
  "runStartedAt": "2026-01-01T12:00:00.000Z",
  "createdAt": "2026-01-01T12:00:00.000Z",
  "updatedAt": "2026-01-01T12:00:00.000Z"
}
```

## Notes

The endpoint must be enabled. The delivery must be succeeded, failed or cancelled and have the expected replay count. Conflicts return `409`. Replay preserves event and delivery IDs and starts a new retry budget.

> **Replay can repeat side effects**
> Your receiver must deduplicate by event ID. There are at most 100 explicit replays per delivery.

## Errors

Invalid fields return `400`. Invalid credentials return `401`; a missing scope returns `403`. A missing resource returns `404`. See [error responses](/reference/api/v1/errors).