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Python SDK v2

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

P0Broken core functionality, security issues, critical missing featureBroken core functionality, security issues, critical missing feature

ready for workEnough information for someone to start working onEnough information for someone to start working on

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.

#1253In modelcontextprotocol/python-sdk;

· Kludex opened on Aug 9, 2025

Improved Trio support

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: Draft (not ready).

modelcontextprotocol/python-sdknumber 946

#946In modelcontextprotocol/python-sdk;

· agronholm opened on Jun 12, 2025

Add CORS middleware to Starlette app for frontend support

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

needs more workNot ready to be merged yet, needs additional follow-up from the author(s).Not ready to be merged yet, needs additional follow-up from the author(s).

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: Draft (not ready).

modelcontextprotocol/python-sdknumber 1201

#1201In modelcontextprotocol/python-sdk;

· SmartManoj opened on Jul 26, 2025

fix: Handle SSE Disconnects Properly When use starlette middleware

needs more workNot ready to be merged yet, needs additional follow-up from the author(s).Not ready to be merged yet, needs additional follow-up from the author(s).

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: Draft (not ready).

modelcontextprotocol/python-sdknumber 1222

#1222In modelcontextprotocol/python-sdk;

· wenxuwan opened on Jul 31, 2025

fix: update response status code for invalid session ID in HTTPSessionManger

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

bugSomething isn't workingSomething isn't working

improves spec complianceWhen a change improves ability of SDK users to comply with spec definitionWhen a change improves ability of SDK users to comply with spec definition

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: Draft (not ready).

modelcontextprotocol/python-sdknumber 1395

#1395In modelcontextprotocol/python-sdk;

· Bumshakalaka opened on Sep 24, 2025

Validate metadata keys

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

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 1397

#1397In modelcontextprotocol/python-sdk;

· samchenatti opened on Sep 24, 2025

Lifespan enters and exits for each request when stateless_http=True

bugSomething isn't workingSomething isn't working

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

P0Broken core functionality, security issues, critical missing featureBroken core functionality, security issues, critical missing feature

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.

#1304In modelcontextprotocol/python-sdk;

· savvaki opened on Aug 24, 2025

Specific transports could be Python package extras

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

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

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

ready for workEnough information for someone to start working onEnough information for someone to start working on

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.

#3In modelcontextprotocol/python-sdk;

· dsp-ant opened on Sep 25, 2024

Excessive use of generics

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

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

P1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested feature

ready for workEnough information for someone to start working onEnough information for someone to start working on

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.

#1207In modelcontextprotocol/python-sdk;

· samuelcolvin opened on Jul 28, 2025

Type system complexity creating developer friction and maintenance overhead

breaking changeWill break existing deployments when updated without changesWill break existing deployments when updated without changes

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

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

ready for workEnough information for someone to start working onEnough information for someone to start working on

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.

#837In modelcontextprotocol/python-sdk;

· davenpi opened on May 29, 2025