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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: Closed (abandoned).

modelcontextprotocol/python-sdknumber 1201

#1201 In modelcontextprotocol/python-sdk;

· by SmartManoj was closed on Apr 6, 2026

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: Closed (abandoned).

modelcontextprotocol/python-sdknumber 1395

#1395 In modelcontextprotocol/python-sdk;

· by Bumshakalaka was closed on Jul 29, 2026

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: Closed (abandoned).

modelcontextprotocol/python-sdknumber 1397

#1397 In modelcontextprotocol/python-sdk;

· by samchenatti was closed on Jun 2, 2026

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

P1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested 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: Closed (completed).

#1304 In modelcontextprotocol/python-sdk;

· by savvaki was closed on Feb 19, 2026

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

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

P1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested 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: Closed (completed).

#1207 In modelcontextprotocol/python-sdk;

· by samuelcolvin was closed on Jul 29, 2026

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

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

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: Closed (completed).

#837 In modelcontextprotocol/python-sdk;

· by davenpi was closed on Jul 24, 2026

fix mcp.types.Tool is not following python's naming convention snake_case

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

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: Closed (abandoned).

modelcontextprotocol/python-sdknumber 113

#113 In modelcontextprotocol/python-sdk;

· by azdolinski was closed on Sep 26, 2025

feat: default streamable_http_path to "/" for consistency

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

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).

Status: Closed (abandoned).

modelcontextprotocol/python-sdknumber 1007

#1007 In modelcontextprotocol/python-sdk;

· by tewatia was closed on Sep 26, 2025

mcp.types.Tool is not following python's naming convention

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: Closed (completed).

#97 In modelcontextprotocol/python-sdk;

· by santosflores was closed on Dec 8, 2025

FastMCP 2.0 vs MCP Python SDK Server

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

P2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable 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: Closed (completed).

#1068 In modelcontextprotocol/python-sdk;

· by AaronLeon was closed on Dec 8, 2025