OpenAI-compatible relay
What is an OpenAI-compatible API relay?
An OpenAI-compatible API relay is a gateway that accepts familiar OpenAI-style requests and adds controls such as prepaid balance checks, per-key limits, request logs, and routing policy.
Definition
A relay sits between an application and one or more model providers. The application keeps using OpenAI-compatible endpoints while the relay handles key policy, metering, logging, and routing.
Why developers use one
Teams add a relay when direct provider access is not enough for cost visibility, team key management, or request-level audit trails.
- Centralize API keys
- Stop requests at budget limits
- Export usage for review
Relay vs direct provider
Direct provider access is simpler for one developer. A relay is useful when multiple apps, teammates, or customers share AI spend.
FAQ
Does a relay replace the model provider?
No. It adds a gateway layer for policy, logs, routing, and billing controls.
Is OpenAI-compatible the same as OpenAI-owned?
No. It means the API shape is compatible. NexRelay is an independent third-party service.