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Hidden path parameters remain in the tool description

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

openapiRelated to OpenAPI integration, parsing, or code generation features.Related to OpenAPI integration, parsing, or code generation features.

Status: Open.

#3130 In jlowin/fastmcp;

· VladyslavHl opened on Feb 10, 2026

·  

3.0

FastMCP App: easy file transfer

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

Status: Open.

#3127 In jlowin/fastmcp;

· jlowin opened on Feb 9, 2026

·  

3.1

feat: Add comprehensive error context tracking and diagnostic middleware

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

Status: Open.

#3126 In jlowin/fastmcp;

· dmzoneill opened on Feb 9, 2026

FastMCP 3.0 Release Timeline

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

v3Targeted for FastMCP 3Targeted for FastMCP 3

Status: Open.

#3125 In jlowin/fastmcp;

· jlowin opened on Feb 9, 2026

·  

3.0

Validate tool app resource_uri references at startup

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

mcp appsRelated to MCP Apps - user-facing applications with frontend bundles served by MCP servers.Related to MCP Apps - user-facing applications with frontend bundles served by MCP servers.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3118 In jlowin/fastmcp;

· jlowin opened on Feb 9, 2026

FastMCP.from_openapi() tool call fails on some models like claude when tool call with POST parameters in prompt

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

httpRelated to HTTP transport, networking, or web server functionality.Related to HTTP transport, networking, or web server functionality.

openapiRelated to OpenAPI integration, parsing, or code generation features.Related to OpenAPI integration, parsing, or code generation features.

Status: Open.

#3113 In jlowin/fastmcp;

· sandeepkunusoth opened on Feb 7, 2026

Flaky test in release/2.x - SQL Locking due to DiskStore

authRelated to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.Related to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

tests

v2

Status: Open.

#3110 In jlowin/fastmcp;

· SrzStephen opened on Feb 7, 2026

Allow PKCE public clients without client_secret

authRelated to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.Related to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3106 In jlowin/fastmcp;

· kj-9 opened on Feb 7, 2026

get_access_token returns None in background tasks (task=True)

authRelated to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.Related to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.

bugSomething isn't working. Reports of errors, unexpected behavior, or broken functionality.Something isn't working. Reports of errors, unexpected behavior, or broken functionality.

duplicateDuplicates an existing open issue. Reference the original issue when applying.Duplicates an existing open issue. Reference the original issue when applying.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3095 In jlowin/fastmcp;

· cristiangreco94 opened on Feb 6, 2026

Add doc for testing FastMCP servers with postman

documentationUpdates to docs, examples, or guides. Primary change is documentation-related.Updates to docs, examples, or guides. Primary change is documentation-related.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3091 In jlowin/fastmcp;

· strawgate opened on Feb 6, 2026

Make opentelemetry-api an optional dependency with config gate

duplicateDuplicates an existing open issue. Reference the original issue when applying.Duplicates an existing open issue. Reference the original issue when applying.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

proposalA proposal for a feature or enhancement either requiring or seeking comments on its design.A proposal for a feature or enhancement either requiring or seeking comments on its design.

serverRelated to FastMCP server implementation or server-side functionality.Related to FastMCP server implementation or server-side functionality.

Status: Open.

#3068 In jlowin/fastmcp;

· major opened on Feb 3, 2026

CLI OAuth: auto-use encrypted disk storage when encryption key is available

authRelated to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.Related to authentication (Bearer, JWT, OAuth, WorkOS) for client or server.

cliRelated to FastMCP CLI commands (run, dev, install) or CLI functionality.Related to FastMCP CLI commands (run, dev, install) or CLI functionality.

enhancementImprovement to existing functionality. For issues and smaller PR improvements.Improvement to existing functionality. For issues and smaller PR improvements.

Status: Open.

#3053 In jlowin/fastmcp;

· jlowin opened on Feb 1, 2026