v4.12.3

punkpeye/fastmcpv4.12.3Aug 4, 2026by github-actions[bot]

AI Summary

Includes multiple stability improvements such as timeouts for OAuth/discovery fetches, scope normalization in JWKS, and better reporting for unsupported tool schemas.

Key Highlights

Added timeout to upstream OAuth and discovery fetch calls
Normalized scope in JWKS claim mapping
Enabled contents write
Early reporting of unsupported tool schemas

Full Release Notes

## [4.12.3](https://github.com/punkpeye/fastmcp/compare/v4.12.2...v4.12.3) (2026-08-04)


### Bug Fixes

* allow contents write ([f1311e6](https://github.com/punkpeye/fastmcp/commit/f1311e6ae7a294b54b47021e816ef0d55aa53aea))
* **auth:** add timeout to upstream OAuth and discovery fetch calls ([#304](https://github.com/punkpeye/fastmcp/issues/304)) ([83e0725](https://github.com/punkpeye/fastmcp/commit/83e07257528132f084442b4144edd3c779896b6b))
* **auth:** normalize scope in JWKS claim mapping ([#309](https://github.com/punkpeye/fastmcp/issues/309)) ([180dfb1](https://github.com/punkpeye/fastmcp/commit/180dfb17f8598af5067d8eb13c782caacd61f55b)), closes [#308](https://github.com/punkpeye/fastmcp/issues/308)
* force new release ([887a652](https://github.com/punkpeye/fastmcp/commit/887a652252ab2a11b3dda818bf56c96a6f9754c4))
* report unsupported tool schemas early ([#307](https://github.com/punkpeye/fastmcp/issues/307)) ([7a604df](https://github.com/punkpeye/fastmcp/commit/7a604dfd927f468069f6d048dbe3f63bbefbd366))