v4.20.17 v31.5.2
punkpeye/fastmcpSep 24, 2026 → Sep 23, 20260 days between releases
AI comparison unavailable for this pair right now — see the full release notes below for what each version contains.
The Two Releases
v4.20.17
v4.20.17
Sep 24, 2026· 27 days ago
This release focuses on bug fixes, including correcting error responses for missing prompt arguments, fixing CLI validation path handling, and ensuring tool visibility for unauthenticated sessions. It also improves OpenAPI schema generation by preserving types for non-nullable fields.
Full release notes