Codex integration
Codex API key setup with prepaid controls
Codex can create valuable AI workflows, but agent retries, large repository context, and long output can make spend hard to predict. NexRelay gives developers using coding agents for repository edits, refactors, and long sessions a controlled gateway key before scaling usage.
How Codex fits
Codex belongs to OpenAI-compatible coding clients. The safest setup is a dedicated gateway key, a compatible endpoint, and a small first budget so one client can be tested without exposing a broad provider key.
Recommended setup
Use a NexRelay API key with the OpenAI-compatible base URL, then start with a small scoped key.
- Create one key for this client only
- Start with a small daily or monthly budget
- Use model allowlists for early testing
- Review request logs after the first successful call
What to verify
After the first request, check that the expected model, endpoint, token meters, billed amount, and status appear in the usage ledger. Increase limits only after the route behaves as expected.
FAQ
Can Codex use a NexRelay API key?
Codex can use NexRelay when the client supports a compatible custom base URL and API key for its request style.
Why use a separate key for Codex?
A separate key makes spend easier to cap, audit, rotate, and disable without affecting other tools.