v4.22.0

Name: ink
Author: vadimdemedes

vadimdemedes/inkv4.22.0Sep 26, 2026by github-actions[bot]

Upgrading?

What changed from v1.10.0 → v4.22.0?What's new in v1.16.20 after v4.22.0?

AI Summary

Fixes authentication, logging, and OpenAPI handling in the MCP server.

Key Highlights

Advertised `none` as a valid token endpoint auth method.
Logging level now respects the client's settings.
OpenAPI query arrays now properly honor the explode directive.

New Features

Forwarding of `enableCimd`, `allowPlainPkce`, and `authorizationResponseIss` through providers.

Full Release Notes

# [4.22.0](https://github.com/punkpeye/fastmcp/compare/v4.21.2...v4.22.0) (2026-09-26)


### Bug Fixes

* **auth:** advertise `none` as a token endpoint auth method ([#395](https://github.com/punkpeye/fastmcp/issues/395)) ([da8daa8](https://github.com/punkpeye/fastmcp/commit/da8daa81a17026e8e9b72da5fa26da784195b92a))
* **auth:** name the MCP endpoint as the protected resource ([#394](https://github.com/punkpeye/fastmcp/issues/394)) ([e858799](https://github.com/punkpeye/fastmcp/commit/e858799b63fde9657f0a5bbf4472559325cec9bb))
* declare tools.listChanged, which the server already notifies ([#399](https://github.com/punkpeye/fastmcp/issues/399)) ([b4bb8dc](https://github.com/punkpeye/fastmcp/commit/b4bb8dcef905c2d7b09d3283008d6b8853e38d20))
* do not throw out of addTool when a session negotiated no such capability ([#401](https://github.com/punkpeye/fastmcp/issues/401)) ([aca1b86](https://github.com/punkpeye/fastmcp/commit/aca1b86dd1c17accd85accb99c783a1a3d537fd8))
* honour the logging level the client sets ([#400](https://github.com/punkpeye/fastmcp/issues/400)) ([915cc60](https://github.com/punkpeye/fastmcp/commit/915cc605988e1179ce2568d82443a3af77825f39))
* **openapi:** honor explode for form-style query arrays ([#398](https://github.com/punkpeye/fastmcp/issues/398)) ([bb8c2e7](https://github.com/punkpeye/fastmcp/commit/bb8c2e740bd8bab63148f7d5da5e639d5a80d09b))


### Features

* **auth:** forward `enableCimd`, `allowPlainPkce` and `authorizationResponseIss` through providers ([#396](https://github.com/punkpeye/fastmcp/issues/396)) ([882163a](https://github.com/punkpeye/fastmcp/commit/882163aa41564a722ac8afaf476ab3cb5c7d6381))

Related Repositories

openclaw/openclaw★ 392,723

The AI that really does things. Any OS. Any Platform. The lobster way. 🦞

nilbuild/developer-roadmap★ 370,097

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

morluto/rea★ 360,734

Reverse engineer anything with agents, from app behavior down to native binaries.

anomalyco/opencode★ 219,889

The open source coding agent.

n8n-io/n8n★ 208,286

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.