Add HTTP client close for explicit session termination#326
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atesgoral wants to merge 1 commit intomodelcontextprotocol:mainfrom
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Add HTTP client close for explicit session termination#326atesgoral wants to merge 1 commit intomodelcontextprotocol:mainfrom
atesgoral wants to merge 1 commit intomodelcontextprotocol:mainfrom
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Per MCP spec, clients that no longer need a session SHOULD send an HTTP DELETE to the MCP endpoint with the Mcp-Session-Id header to explicitly terminate it. Servers MAY respond with 405 Method Not Allowed when they don't support client-initiated termination. `MCP::Client::HTTP#close` sends the DELETE with session headers, clears local session state regardless of outcome, and is a no-op when no session has been established. https://modelcontextprotocol.io/specification/2025-11-25/basic/transports#session-management
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This was referenced Apr 20, 2026
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Summary
Adds
MCP::Client::HTTP#closeto explicitly terminate a server session.Per the Streamable HTTP spec, clients that no longer need a session SHOULD send an HTTP DELETE to the MCP endpoint with the
Mcp-Session-Idheader. The server MAY respond with 405 Method Not Allowed when it doesn't support client-initiated termination.Behavior
DELETEto the MCP endpoint withMcp-Session-IdandMCP-Protocol-Versionheaderssession_id,protocol_version) regardless of the server's response405 Method Not Allowedis treated as successPart of a stacked series
This is PR #4 of a series splitting #321 into small, self-contained changes:
202 AcceptedhandlingMcp-Session-Id/MCP-Protocol-Version)connect)Test plan
bundle exec rake test— 762 runs)examples/streamable_http_server.rb: DELETE 200 from server, second request with the terminated session ID raisesSessionExpiredError🤖 Generated with Claude Code