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FAQ

Is this a full replacement for all official APIs?

No. Nexus supports a limited set of validated endpoints and workflows.

How do I know which models are available to me?

Run GET /v1/models with your key.

The list depends on your key settings, so rely on the API response rather than someone else's example.

Can I use one key for multiple projects?

Yes, but it is usually more convenient to separate projects across different keys. That makes balance and usage easier to track.

Can I get multiple keys?

Yes. Additional keys can be issued on request.

Which currency is used for billing?

Rubles.

Why are the prices approximate?

Because the final cost depends on the model, token counts, and specifics of the actual response. The documentation provides estimates.

Is streaming supported?

Yes, on these endpoints:

  • POST /v1/messages;
  • POST /v1/responses;
  • POST /v1/responses/compact.

Why can a request be rejected before execution?

Usually for one of these reasons:

  • invalid key;
  • insufficient balance;
  • the model is not enabled for the key;
  • the endpoint is not enabled for the key;
  • the model does not match the selected endpoint;
  • safe pricing calculation is temporarily unavailable.

Can I use Nexus in Codex?

Yes. The recommended endpoint is POST /v1/responses.

Can I use Nexus in Claude Code?

Yes. The recommended endpoint is POST /v1/messages.

Where can I get help?