add stateless http transport support

[Edison-A-N]

Describe your changes

add stateless http transport support

Issue ticket number and link (if applicable)

#209

Screenshots of the feature / bugfix

Checklist before requesting a review

• Added relevant tests
• Run ruff & mypy
• All tests pass

[buhaiqing]

I hope this feature can be officially released as soon as possible

[frouzbeh]

Hi, Is this pr complete? I am trying to use langchain mcp-adapter client, and it seems it only supports stateless streamable_http.

[Edison-A-N]

Hi @frouzbeh

You can test the changes in either branch—both are already rebased on the latest main:

• feature/stateless-flag
• feature-test

Both branches contain the feature proposed in this PR.

[jakegt1]

this really would be great to have merged as atm you simply cannot use this with gunicorn at all.

[Edison-A-N]

You're right — as I mentioned in this comment, the current implementation breaks under Gunicorn with multi workers.

[brendanshanahan]

You're right — as I mentioned in this comment, the current implementation breaks under Gunicorn with multi workers.

it would be great to get this merged. i'm hitting the same wall with a multi-worker gunicorn application and switching it to single-worker is not an option