---
title: "Register webhook"
method: POST
path: "/api/webhooks"
tags: ["webhooks"]
---

# Register webhook

`POST /api/webhooks`

## Request

- Base URL: `https://api.mymarky.ai`
- URL: `https://api.mymarky.ai/api/webhooks`
- Auth: HTTP bearer

Register a webhook URL to receive events.

Currently supported events:
- `post.published` — fired when a post is published to any platform.
  Payload includes the full post object with `business_id`.

Webhooks are org-scoped. One registration covers all businesses in the org.

Send an `Idempotency-Key` header to make a retry safe (a resend with the same
key returns the original webhook instead of registering a duplicate).

Errors:
    400 invalid_request: The URL is not HTTPS, or the org already has 5 webhooks.
    401 authentication_required: API key or token is missing, invalid, or revoked.
    403 permission_denied: Your plan does not include API access.
    422 IDEMPOTENCY_KEY_CONFLICT: The Idempotency-Key was reused with a different body.
    429 rate_limit_exceeded: You sent too many requests this minute.

## Headers

- `Idempotency-Key` string, nullable: Optional. Send a unique value (e.g. a UUID) to make this create request safe to retry. A repeat with the same key returns the original response instead of creating a duplicate. Cached for 24h, scoped to your org. Reusing a key with a different body returns 422.
- `Marky-Version` '2026-04-08' | '2026-07-17' | '2026-08-02' | '2026-08-04' | '2026-08-06'

## Request body

- WebhookCreateRequest
  - `url` string, required: HTTPS URL to receive webhook events
  - `events` string[], required: Events to subscribe to

## Response `201`

Successful Response

- WebhookResponse
  - `id` string, required
  - `url` string, required
  - `events` string[], required
  - `org_id` string, required
  - `secret` string, nullable: Signing secret (only shown on creation)
  - `created_at` string, required

## Other responses

- `400`: Bad request — the input was malformed or otherwise invalid.
- `401`: Authentication failed — the API key is missing or invalid.
- `422`: Validation error — one or more fields failed validation.
- `429`: Rate limited — retry after the window resets (see Retry-After).
- `500`: Server error — something failed on our side; retry or quote X-Request-Id.

---

[API](https://skmtc.dev/mymarky/apis/marky-public-api.md) · [All operations](https://skmtc.dev/mymarky/apis/marky-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mymarky/apis/marky-public-api/revisions/25aeacae455c?raw)