Fails with 400 bad request

[sgentile]

I have my graphql server running on http://localhost:9000/api

(confirmed running)

this call:
npx @apollo/rover subgraph introspect http://localhost:9000/api

error[E004]: HTTP status client error (404 Not Found) for url (http://localhost:9000/)
              This error was unexpected! Please submit an issue with any relevant details about what you were trying to do: https://github.com/apollographql/rover/issues/new/choose

[lrlna]

Thanks for the report @sgentile!

Could you run your command with --log debug, so npx @apollo/rover subgraph introspect http://localhost:9000/api --log trace, and let me know if you get starting with, let's say TRACE rover_client::blocking::client:.

Another thing to double-check, is whether your endpoint is federated. subgraph introspect only works for federated endpoints. So for example, given that my server is running on http://localhost:9000, and my subgraphs reside at http://localhost:9001 and http://localhost:9002, I can run only run subgraph introspect on 9001 and 9002. 9000 requires a graph introspect command, and subgraph introspect would error.

[lrlna]

As point of comparison, here is what it looks like for me when I run subgraph introspect with --log=trace on the server (rather than a subgraph server):