StreamableHttp - stateless server support #554
+304
−2
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
8 tasks
This was referenced Apr 21, 2025
Closed
jerome3o-anthropic
approved these changes
Apr 23, 2025
examples/servers/simple-streamablehttp-stateless/mcp_simple_streamablehttp_stateless/server.py
Outdated
Show resolved
Hide resolved
src/mcp/server/lowlevel/server.py
Outdated
| # When True, the server will wait for the client to send an initialization | ||
| # message before processing any other messages. | ||
| # False should be used for stateless servers. | ||
| require_initialization: bool = True, |
There was a problem hiding this comment.
[nit / question] should we just spoof the initialization on these requests with capabilities that a stateless server would have (i.e. capabilities={})? that way the life cycle of the mcp server is still spec compliant - it's a bit of a pointless dance though, so I'm happy to leave it as you have it.
The code as it stands feels like this could be interpreted as initialization being optional - that's my main concern
There was a problem hiding this comment.
I think I'd probaly change the name, require_initialization sounds like we are skipping the protocol requirement on intialization
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Tested with multi-client test script in Typescript introduced in this PR
uv run mcp-simple-streamablehttp-stateless --log-level DEBUGuv run mcp-simple-streamablehttp-stateless --json-responseFollow ups
Stacked on top of #553