Cursor speaks OpenAI-compatible chat. Swap base URL + key to route through KeyoAPI.
In Cursor model / OpenAI-compatible settings (wording varies by Cursor version):
https://www.keyoapi.xyz/v1deepseek-v4.1-flashConfirm IDs on /pricing-list or /pricing.
Send a short chat. If you see auth or balance errors, re-check the key and Wallet. Wrong model strings fail even with a valid key.
For prototypes, start with a $0 ID from /free-models (fair-use). Switch the model string to a metered twin when you need higher priority.