v4.20.0 v4.19.1

Name: fastmcp
Author: punkpeye

punkpeye/fastmcpSep 4, 2026 → Sep 4, 20260 days between releases

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Analyzing what changed between v4.20.0 and v4.19.1. This page updates automatically — usually within a minute.

The Two Releases

v4.20.0

Sep 4, 2026· 2 months ago

A feature release introducing OpenAPI support, including wiring up output schemas, structured content, and serialization styles for queries and bodies.

Full release notes

v4.19.1

Sep 4, 2026· 2 months ago

This is a maintenance release focused on bug fixes related to authentication and HTTP stream handling to ensure proper resource cleanup and authentication efficiency.

Full release notes