Spend stops at zero
Prepaid balance is checked before routing, so empty wallets never become surprise invoices.
Prepaid OpenAI-compatible gateway for controlled AI spend
Control AI API costs before they surprise you.
NexRelay gives developers a prepaid OpenAI-compatible relay with request-level logs, per-key budgets, and balance protection, so every API call is visible, auditable, and capped before it runs.
Prepaid onlyRequest-level logsBudget controlsBalance protectionCSV-ready usage
Third-party service. No overage billing: requests stop when balance or key budgets are exhausted.
Auditable request ledger
One row per billable call
Request IDreq_8f31...a91c
Modelgpt-5.5
Input / output / cache18,240 / 912 / 4,096
Deducted$0.0236
curl https://nexrelay-api.xyz/api/v1/chat/completions \
-H "Authorization: Bearer sk_live_..."
Keys carry limits
Set daily budgets, monthly budgets, model allowlists, IP rules, and output caps per API key.
Every request is traceable
Audit request id, key, model, token meters, unit prices, status, and billed amount for transparent AI API billing.
Developer guides