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Title: Properly infer prefix for SSE messages by jlowin · Pull Request #659 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Properly infer prefix for SSE messages by jlowin · Pull Request #659 · modelcontextprotocol/python-sdk

X Title: Properly infer prefix for SSE messages by jlowin · Pull Request #659 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - Properly infer prefix for SSE messages by jlowin · Pull Request #659 · modelcontextprotocol/python-sdk

Open Graph Description: I've been following the issue in #386 and see the solution merged in #540. However, it feels very wrong. An app should never have to know its mount path in advance in order to work properly. Fu...

X Description: I've been following the issue in #386 and see the solution merged in #540. However, it feels very wrong. An app should never have to know its mount path in advance in order to work properly...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/659

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og:image:altI've been following the issue in #386 and see the solution merged in #540. However, it feels very wrong. An app should never have to know its mount path in advance in order to work properly. Fu...
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May 8, 2025https://github.com/modelcontextprotocol/python-sdk/pull/659#issue-3047823055
#386https://github.com/modelcontextprotocol/python-sdk/pull/386
#540https://github.com/modelcontextprotocol/python-sdk/pull/540
#540https://github.com/modelcontextprotocol/python-sdk/pull/540
Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/659
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May 8, 2025 00:52https://github.com/modelcontextprotocol/python-sdk/pull/659#commits-pushed-3437361
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Properly infer prefix for SSE messageshttps://github.com/modelcontextprotocol/python-sdk/pull/659/commits/34373619b5e7bc1fce7f50304fcdc4e52410a1a7
3437361https://github.com/modelcontextprotocol/python-sdk/pull/659/commits/34373619b5e7bc1fce7f50304fcdc4e52410a1a7
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Fix line lengthhttps://github.com/modelcontextprotocol/python-sdk/pull/659/commits/7ebed765f5b9ef4152b23d3e2ae857bf8a84d48d
7ebed76https://github.com/modelcontextprotocol/python-sdk/pull/659/commits/7ebed765f5b9ef4152b23d3e2ae857bf8a84d48d
Port mount_path support from official SDK PrefectHQ/fastmcp#370 https://github.com/PrefectHQ/fastmcp/issues/370
Ensure FastMCP handles nested SSE and SHTTP apps properly in ASGI frameworks PrefectHQ/fastmcp#390 https://github.com/PrefectHQ/fastmcp/pull/390
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May 10, 2025https://github.com/modelcontextprotocol/python-sdk/pull/659#issuecomment-2868569293
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May 12, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3055884552
Add base_path support for SSE endpoint subpath routing via nginx or other http middleware PrefectHQ/fastmcp#415 https://github.com/PrefectHQ/fastmcp/pull/415
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May 12, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3058067941
Remove patch and use upstream SSEServerTransport PrefectHQ/fastmcp#425 https://github.com/PrefectHQ/fastmcp/pull/425
Fix SSE client failing when server not running on root #564 https://github.com/modelcontextprotocol/python-sdk/pull/564
feat: add url_prefix support to FastMCP SSE #278 https://github.com/modelcontextprotocol/python-sdk/pull/278
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May 13, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3006141497
Add mount_path support for proper SSE endpoint routing with multiple FastMCP servers #540 https://github.com/modelcontextprotocol/python-sdk/pull/540
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May 13, 2025 22:51https://github.com/modelcontextprotocol/python-sdk/pull/659#event-17643663628
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May 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3078274089
Fix MCP server mounted path gradio-app/gradio#11231 https://github.com/gradio-app/gradio/pull/11231
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May 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3039772502
Fix SSE server transport to support relative and absolute endpoints #633 https://github.com/modelcontextprotocol/python-sdk/pull/633
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Jun 18, 2025https://github.com/modelcontextprotocol/python-sdk/pull/659#issuecomment-2985473699
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Bump fastmcp from 2.10.5 to 2.13.0 in /server/web-risk alphasecio/mcp-client-server#7 https://github.com/alphasecio/mcp-client-server/pull/7
Bump fastmcp from 2.12.4 to 2.13.0.2 alphasecio/mcp-client-server#10 https://github.com/alphasecio/mcp-client-server/pull/10
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Nov 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3599174838
Bump fastmcp from 2.12.4 to 2.13.0 in /server/hello alphasecio/mcp-client-server#11 https://github.com/alphasecio/mcp-client-server/pull/11
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Dec 26, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-pullrequest-3764119475
Bump fastmcp from 2.13.0.2 to 2.14.0 in /server/hello alphasecio/mcp-client-server#13 https://github.com/alphasecio/mcp-client-server/pull/13
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Bump fastmcp from 2.13.0.2 to 2.14.0 in /client/playground alphasecio/mcp-client-server#14 https://github.com/alphasecio/mcp-client-server/pull/14
Bump fastmcp from 3.1.0 to 3.2.0 in /server/hello alphasecio/mcp-client-server#15 https://github.com/alphasecio/mcp-client-server/pull/15
Bump fastmcp from 3.1.0 to 3.2.0 in /client/hello alphasecio/mcp-client-server#16 https://github.com/alphasecio/mcp-client-server/pull/16
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May 18, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/659#ref-issue-2966900247
sse_app() ignores mount prefix, resulting in 404 from client #412 https://github.com/modelcontextprotocol/python-sdk/issues/412
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