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FastMCP

v3.27.0 Feature

This release adds 1 notable feature for engineering teams evaluating rollout.

Published 4mo MCP Developer Tools
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

mcp sse

Affected surfaces

auth

Summary

AI summary

Added client_secret_basic authentication method for the OAuth upstream token endpoint

Full changelog

3.27.0 (2026-01-19)

Features

  • oauth: add client_secret_basic auth method for upstream token endpoint (#224) (0ea26ed)

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About FastMCP

A high-level framework for building MCP servers in TypeScript

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Beta — feedback welcome: [email protected]