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HTTP Transport Edge Cases
OpenFeb 19, 2026
No due date
•Last updated 70% complete
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0 of 3 selected 0 issues of 3 selected
Cannot break out of session.initialize() when using streamable-http
bugSomething isn't workingSomething isn't workingP1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested featureready for workEnough information for someone to start working onEnough information for someone to start working onStatus: Open.#874 In modelcontextprotocol/python-sdk;Streamable HTTP client performance regression starting with v1.12.0
bugSomething isn't workingSomething isn't workingP2Moderate issues affecting some users, edge cases, potentially valuable featureModerate issues affecting some users, edge cases, potentially valuable featureready for workEnough information for someone to start working onEnough information for someone to start working onStatus: Open.#1274 In modelcontextprotocol/python-sdk;AssertionError: Unexpected message while using middlewares
bugSomething isn't workingSomething isn't workingP1Significant bug affecting many users, highly requested featureSignificant bug affecting many users, highly requested featureready for workEnough information for someone to start working onEnough information for someone to start working onStatus: Open.#883 In modelcontextprotocol/python-sdk;