v4.22.1

Name: Stirling-PDF
Author: Stirling-Tools

Stirling-Tools/Stirling-PDFv4.22.1Sep 30, 2026by github-actions[bot]

Upgrading?

What changed from v2.10.2 → v4.22.1?What's new in v0.6.1 after v4.22.1?

AI Summary

This release focuses on bug fixes addressing error handling for unknown tools, resource initialization protocols, and OpenAPI parameter configurations.

Key Highlights

Answers error code -32602 for unknown tools or resources
Fixes edge initialization to use the client's protocol version
Ensures GET requests with referenced array parameters remain tools in OpenAPI

Full Release Notes

## [4.22.1](https://github.com/punkpeye/fastmcp/compare/v4.22.0...v4.22.1) (2026-09-30)


### Bug Fixes

* answer -32602 for an unknown tool or resource ([#406](https://github.com/punkpeye/fastmcp/issues/406)) ([3cc03cf](https://github.com/punkpeye/fastmcp/commit/3cc03cfea6ca74dd5b0c004de498a3083e8f2348))
* **edge:** answer initialize with the client's protocol version ([#403](https://github.com/punkpeye/fastmcp/issues/403)) ([da0c026](https://github.com/punkpeye/fastmcp/commit/da0c026916fc31976123cdc7e86f88d74c8e14a7))
* **openapi:** keep GETs with referenced array parameters as tools ([#405](https://github.com/punkpeye/fastmcp/issues/405)) ([14e4883](https://github.com/punkpeye/fastmcp/commit/14e4883ce902f773566c72297d7ccf735a1ac6b8))

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