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Sending cancellation notification to server based on client anyio.CancelScope status

2

## Motivation and Context MCP 2025-03-26 introduces a cancellation notification [1] this patch simplifies the usage of this function for the ClientSession by using the anyio.CancelScope as a trigger to...

davemssavage

add Tool.outputSchema and CallToolResult.structuredContent

4

Enable tool to return structured content and output schema. ## Motivation and Context As per discussion in https://github.com/modelcontextprotocol/modelcontextprotocol/pull/371 there are use cases where being able to know the schema of...

davemssavage

Is call_tool response streaming

2

Does current SSE transport or streamingable HTTP spec and python sdk allow call_tool return SSE stream of messages ? Current test shows that in python sdk call_tool result will be...

wolvever

Hi, I created two functions to call the MCP server, following the official examples. I even specifically set `sse_read_timeout=None` for the SSE connection. However, both functions end up throwing `Session...

johnson7788

Feature/add enable disable methods tools

5

Added the ability to dynamically enable and disable tools at runtime with client notifications. ## Motivation and Context This change allows developers to temporarily restrict access to specific tools without...

davila7

**Is your feature request related to a problem? Please describe.** When using the client SDK to connect MCP server behind an `API gateway` that adds a deployment-specific prefix (e.g., `/gateway_prefix/`),...

lizzzcai

sse_app() ignores mount prefix, resulting in 404 from client

11

**Describe the bug** When mounting sse_app() from FastMCP with a URL prefix using Starlette’s Mount, the SSE stream still returns the default /messages/ endpoint without the prefix. This causes the...

allieus

307 Temporary Redirect

6

INFO: 127.0.0.1:56991 - "POST /mcp HTTP/1.1" 307 Temporary Redirect INFO: 127.0.0.1:56991 - "POST /mcp/ HTTP/1.1" 200 OK After using mcp.run(transport="streamable-http") to start the server, why does the client always redirect...

2495710777

Issue: https://github.com/modelcontextprotocol/python-sdk/issues/602 The `GetPromptResult` class has the field description, however it is not getting returned when using the FastMCP server. Example ``` INFO Processing request of type GetPromptRequest server.py:534 meta=None...

megandsouza03

Tests(cli): Add coverage for helper functions

1

### Summary This PR is tests‑only; it adds coverage but introduces no functional changes. Add unit tests for three un-covered helpers in `src/mcp/cli/cli.py` * **_parse_file_path** (valid / invalid specs) *...

davenpi