FastMCP v4.1.8
FastMCP 4.1.8 backports 28 fixes from the 4.2 line.
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FastMCP changelog
9 versions of FastMCP from FastMCP in The Deploy Log. From to . On the median a new version every 8 days, publisher's dates only; the longest wait was 13 days. The newest is v4.1.8. 7 versions in the last 30 days. Each links the publisher's own page.
| Version | Publisher's date | Days after the one before |
|---|---|---|
| v4.1.8 | 0 | |
| v4.1.7 | 7 | |
| v4.1.6 | 8 | |
| v4.1.4 | 6 | |
| v4.1.2 | 12 | |
| v4.1.0 | 13 | |
| v4.0.10 | ||
| v3.4.11 | 0 | |
| v3.4.10 |
FastMCP v4.1.7
FastMCP 4.1.7 backports 42 fixes from the 4.2 line.
FastMCP v4.1.6
ClientGroup keeps tool routes after group context exits.
FastMCP v4.1.4
FastMCP v4.1.4 fixes CLI transport preservation, session visibility, OAuth identity assertions, and adds redis-py credential provider support.
FastMCP v4.1.2
FastMCP v4.1.2 applies component authorization after transforms and prevents denied resources from falling through matching templates.
FastMCP v4.1.0
FastMCP v4.1.0 released with fixes across OpenAPI, proxies, auth, tasks, CLI, and full Python 3.15 support.
FastMCP v4.0.10
Task-enabled tools now work behind search transforms and CodeMode.
FastMCP v3.4.11
FastMCP v3.4.11 requires certifi 2026.10.19 or later for its HTTP stack and certifi-backed integrations.
FastMCP v3.4.10
FastMCP v3.4.10 backports authorization checks after transforms and prevents denied concrete resources from being served by matching templates.
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