FastMCP
Latest release v4.1.0 on 2026-10-08 · Actively maintained · 15 releases in 90 days
🚀 The fast, Pythonic way to build MCP servers and clients.
| Latest release | v4.1.0 on 2026-10-08 |
|---|---|
| Maintenance | Actively maintained — pushed within the last 14 days, with 3 or more releases in 90 days |
| Stars | 28,039 |
| Releases in 90 days | 15 |
| Last commit | 2026-10-11 |
| Repository | PrefectHQ/fastmcp |
| Licence | Apache-2.0 |
| Open issues | 428 |
FastMCP release notes and changelog
v4.1.0 2026-10-08
What's new
- Persist encrypted CLI OAuth tokens
- Add TokenCache support to GoogleTokenVerifier and GoogleProvider
- Add gitleaks secret scanning to prek
Fixed
- Make proxy HTTP header forwarding configurable
- Fix!: Qualify MultiAuth client identities
- Fix!: Validate OpenAPI path parameter segments
- Fix!: Resolve skill files within their configured directories by and
Changed
- Preserve the SDK's default session idle timeout
- Restore full Python 3.15 support
v4.0.11 2026-10-04
Fixed
- Resolve injected tools through the server's tool lookup
- Ratelimiting: default burst capacity to at least 1 by and
- Types: map Image jpg/svg/tif formats to canonical MIME types by and
- Client: decode empty structured content into CallToolResult.data by and
Changed
- Update astral-sh/setup-uv action to v10.2.0 by [bot]
v3.4.8 2026-10-04
This release contains important security and bug fixes. All users are encouraged to upgrade. Thanks to our 2 contributors. [3.x] Apply Host/Origin…
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Maintenance status is derived from public repository activity — release cadence and commit recency. It is not a review, an endorsement, or a security assessment. Star counts measure attention, not quality.