ComplyPostComplyPost|API Docs
v1

Developer Docs

ComplyPost API

Integrate ComplyPost with your existing tools. Receive real-time webhook events when letters arrive, get classified, or hit deadlines — and query the REST API for letters, clients, and analytics.

Pro & EnterpriseREST + JSONHMAC-SHA256 SignedBase URL: api.complypost.co.uk

Authentication

Start here

Bearer token setup, API key generation, and request signing.

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Webhooks

Real-time events, HMAC verification, delivery history, and retry logic.

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Letters API

Query letters, filter by status, client, priority, and date range.

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Integrations

Step-by-step guides for n8n, Zapier, and Make.

Read docs

Quick start

Make your first authenticated request in under a minute.

  1. 1Log in to the ComplyPost dashboard and go to Settings → API & Integrations.
  2. 2Generate a new API token. Copy it — it's only shown once.
  3. 3Make a request to the health endpoint to verify your token:
bash
curl -H "Authorization: Bearer YOUR_TOKEN" \
     https://api.complypost.co.uk/health

See the Authentication guide for full token management docs.

Base URL

https://api.complypost.co.uk

All endpoints are prefixed with this base URL. All requests and responses use JSON.