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retired
error_code: E-MCP-003 · status: retired

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What you’re seeing

Nothing: npx vendo doctor cannot print this code anymore. You are reading it from an older run’s output, or a saved report.

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Why

This code fired when the door’s server card did not parse. Doctor fetched the card over HTTP, and it no longer makes any request.

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The fix

The card still has to parse, and you check it yourself now.
A correct response is a JSON object with a name string and a transports array. If it comes back wrong, confirm the door’s well-known routes are mounted at that origin and that nothing in front of the app (a proxy, a rewrite, a CDN edge rule) intercepts the response.
  • E-MCP-004 — server.json registry validation, still checked on disk
  • E-MCP-006 — server.json that is not valid JSON, still checked on disk