| Field | Purpose | Common mistakes |
|---|---|---|
Base URL | Provider endpoint | Wrong protocol or extra path |
API Key | Authentication | Partial copy, expired key |
API Schema | Protocol type | Wrong schema causes request format errors |
Model ID | Target model | Typo or unavailable model |
When adding a provider, choose the right API schema:
OpenAI schema also lets you pick between standard mode (Chat Completions) and the newer Responses API.
Custom Headers (JSON) — Some providers require extra headersCustom Body (JSON) — Add extra fields to the request body