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  3. Cosmic

Cosmic

com.cosmicjs/mcp

Manage Cosmic CMS content, media, object types, and AI generation from any MCP client.

Findings

  • (connection) · transport

    Streamable HTTP error: Error POSTing to endpoint: {"error":"invalid_request","error_description":"Missing Authorization header. Send `Authorization: Bearer <read_key>` for read-only access or `Authorization: Bearer <read_key>:<write_key>` for full access."}

Check history

updated 2h ago·re-checked weekly

DateGradeErrorsWarnings
2026-08-03unreachable——

Graded by connecting to the live server and validating every tool schema. Grades re-run on every sync. Findings and grades are never editable by the publisher.

Kick the tires on your own server: run a check

Grade
–

Not graded: unreachable on the last check.

How grading works

Install

Claude Code (remote)

claude mcp add --transport http com-cosmicjs-mcp https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}

Endpoint (streamable HTTP)

https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}

npm (stdio)

npx -y @cosmicjs/mcp

Verify it yourself

npx tirekick check https://mcp.cosmicjs.com/v1/buckets/{bucket_slug}
Links
  • @cosmicjs/mcp on npm
  • MCP registry entry
  • Your server? Claim this listing