API

API reference

Anything you can do in the UI, you can do via the API. A predictable REST API, real-time webhooks and official SDKs to connect The Agency CRM to your own stack.

Last updated: July 16, 2026

Basics

The API is a REST API with JSON payloads and clear error codes. Every request is authenticated with an API key or an OAuth2 token. All write operations support idempotency keys so you can retry safely without duplicate records.

Authentication

Pass your API key in the Authorization header. Create keys in the dashboard under Settings → API. Keys are scoped and revocable at any time.

curl https://api.theagencycrm.nl/v1/deals \
  -H "Authorization: Bearer YOUR_API_KEY"

Key resources

GET /v1/leads — Fetch leads, with cursor-based pagination.
POST /v1/deals — Create a deal and place it in a pipeline stage.
POST /v1/invoices — Create an invoice and send it with a payment link.
GET /v1/clients — Search and manage your clients and contacts.

Webhooks

Receive events the moment they happen — deal created, deal won, invoice paid — with automatic retries and signature verification. Configure endpoints in the dashboard and verify every payload with the included signature.

MCP

Beyond the REST API, The Agency CRM offers an MCP (Model Context Protocol) server. Use it to connect AI assistants directly to your CRM and call the same actions the built-in assistant uses.

Test all your integrations against the free sandbox with real data structures first, so your production environment stays untouched.

Full reference

The complete endpoint documentation with request and response examples, SDKs and the OpenAPI spec lives on the developers page.

Visit the developers portal