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feat: Add roots enforcement utility to FastMCP (get_roots, assert_within_roots, @within_roots_check)

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs decisionIssue is actionable, needs maintainer decision on whether to implementIssue is actionable, needs maintainer decision on whether to implement

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable feature

Status: Open.

#2453 In modelcontextprotocol/python-sdk;

· NeelakandanNC opened on Apr 16, 2026

Specific ToolNotFoundError for easier handling than ToolError in multi-tenant environments

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs decisionIssue is actionable, needs maintainer decision on whether to implementIssue is actionable, needs maintainer decision on whether to implement

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open.

#2422 In modelcontextprotocol/python-sdk;

· DevonFulcher opened on Apr 10, 2026

Introduce strategy/registry pattern for type handling in _create_output_model()

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs decisionIssue is actionable, needs maintainer decision on whether to implementIssue is actionable, needs maintainer decision on whether to implement

P3Nice to haves, rare edge casesNice to haves, rare edge cases

Status: Open.

#2408 In modelcontextprotocol/python-sdk;

· dgenio opened on Apr 9, 2026

feat: add subject and claims fields to AccessToken

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 2209

#2209 In modelcontextprotocol/python-sdk;

· shivama205 opened on Mar 4, 2026

Type the MCPServer handler pipeline: tool/resource/prompt return types

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2202 In modelcontextprotocol/python-sdk;

· maxisbey opened on Mar 2, 2026

Add Tasks support to MCPServer

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2201 In modelcontextprotocol/python-sdk;

· maxisbey opened on Mar 2, 2026

feat(auth): add Authlib-backed OAuth adapter (related to #1240)

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 2193

#2193 In modelcontextprotocol/python-sdk;

· harsh543 opened on Mar 2, 2026

MCPServer handlers should raise exceptions, not return error objects

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2153 In modelcontextprotocol/python-sdk;

· maxisbey opened on Feb 27, 2026

feat: public API for runtime handler registration/deregistration

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open (in progress).

modelcontextprotocol/python-sdknumber 2146

#2146 In modelcontextprotocol/python-sdk;

· BabyChrist666 opened on Feb 25, 2026

Add wildcard pattern support for allowed_hosts in transport security

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

Status: Open.

#2141 In modelcontextprotocol/python-sdk;

· enkidulan opened on Feb 25, 2026

Public API for runtime handler registration/deregistration on low-level Server

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2135 In modelcontextprotocol/python-sdk;

· maxisbey opened on Feb 24, 2026

Allow OAuthClientProvider to accept a pre-configured auth server URL

authIssues and PRs related to Authentication / OAuthIssues and PRs related to Authentication / OAuth

enhancementRequest for a new feature that's not currently supportedRequest for a new feature that's not currently supported

needs confirmationNeeds confirmation that the PR is actually required or needed.Needs confirmation that the PR is actually required or needed.

Status: Open.

#2121 In modelcontextprotocol/python-sdk;

· martimfasantos opened on Feb 21, 2026