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@gregjohnsonsaltaire
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Claude Desktop requires support for prompts/list and resources/list or it cancels the MCP request

@SteffenDE
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Related anthropics/claude-code#9012.

Looking at this, I think we do actually need to handle it at the proxy level. The MCP Rust SDK reports a HTTP 400 with JSON-RPC method not found as an error, but we need to forward it to the client...

I'll look into it!

@SteffenDE
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Will hopefully fixed upstream in modelcontextprotocol/rust-sdk#486.

I'll update the proxy to include the patch: tidewave-ai/mcp_proxy_rust#16.

@SteffenDE
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@gregjohnsonsaltaire
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gregjohnsonsaltaire commented Oct 15, 2025 via email

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2 participants