> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vendo.run/llms.txt
> Use this file to discover all available pages before exploring further.

# E-MCP-003

> Retired: doctor no longer fetches the MCP server card over HTTP.

```text retired theme={null}
E-MCP-003 — retired, doctor no longer emits this code
```

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

## 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.

## 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.

## The fix

The card still has to parse, and you check it yourself now.

```bash theme={null}
curl -s https://your-app.example.com/.well-known/mcp/server-card.json
```

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.

## Related errors

* [E-MCP-004](/production/troubleshooting/e-mcp-004) — `server.json` registry validation, still checked on disk
* [E-MCP-006](/production/troubleshooting/e-mcp-006) — `server.json` that is not valid JSON, still checked on disk