Cursor API guide

Cursor API guide: use a controlled OpenAI-compatible key

Cursor sessions can become expensive when code context grows. A controlled OpenAI-compatible key lets you test editor workflows while keeping spend bounded.

Cursor API guideCursor API keyCursor OpenAI compatible APICursor cheap API key

Create a Cursor-only key

Use one NexRelay API key for Cursor so editor usage is separated from other tools and apps.

Add limits before real work

A controlled key should start narrow, then expand after logs look correct.

Daily or monthly budget
Model allowlist
Max output tokens
Prepaid wallet balance protection

Use logs as proof

After Cursor sends a request, NexRelay usage logs show which model, key, token meters, and billed amount were used.

FAQ

Why not use one shared key for Cursor and other tools?

Separate keys make it easier to cap editor spend and troubleshoot unexpected usage.

Can I test before paying?

Yes. Use trial credits first, then recharge after setup works.