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gemini-cli - 💡(How to fix) Fix CIMD support for authenticating MCP Servers

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What would you like to be added?

CIMD is a draft spec to support mcp host can identify itself to the authorization server without explicit configuration by the end-user. The latest mcp specification already species that mcp clients SHOULD implement CIMD. Other popular clients such as Claude Desktop, Claude Code, VS Code etc has already implemented it. Are there any plans to support CIMD? Without this feature, many users will be unable to connect to mcp servers that does not support DCR. Thanks!

Why is this needed?

Dynamic Client Registration is not a straightforward spec to implement in many enterprises, considering security, data storage and churn. CIMD fixes these issues and is preferred by the MCP specification.

Additional context

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extent analysis

TL;DR

Implementing Client ID Metadata Document (CIMD) support is likely necessary to enable seamless connection to MCP servers without explicit configuration.

Guidance

  • Review the MCP specification and CIMD draft to understand the requirements and implementation details.
  • Investigate how other clients, such as Claude Desktop and VS Code, have implemented CIMD to identify potential approaches.
  • Consider the security, data storage, and churn implications of implementing CIMD in the context of Dynamic Client Registration.
  • Evaluate the feasibility of implementing CIMD as a priority feature to support MCP servers that do not support DCR.

Notes

The issue highlights the importance of CIMD support for compatibility with MCP servers, but does not provide technical details about the current implementation or specific challenges.

Recommendation

Apply workaround: Implement CIMD support to ensure compatibility with MCP servers that do not support DCR, as it is preferred by the MCP specification and already implemented by other popular clients.

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