> ## Documentation Index
> Fetch the complete documentation index at: https://agentstack.beeai.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Breaking changes and notable updates to the Agent Stack API

All notable breaking changes to the Agent Stack API are documented here. This changelog follows the [Keep a Changelog](https://keepachangelog.com) conventions.

## Unreleased

### Breaking

* **Connectors API**: `POST /api/v1/connectors/{id}/connect` — Replaced the `access_token` field with a `headers` field (a dictionary of arbitrary headers to forward to the MCP server). Certain dangerous headers are blocked. To migrate, change `{"access_token": "<token>"}` to `{"headers": {"Authorization": "Bearer <token>"}}`.