Platform And Endpoint Compatibility

QuotaAPI reads the group bound to the API Key and then selects a handler from the platform and model mapping. A registered route does not mean every group supports that capability.

Core endpoints

Endpoint	OpenAI	Grok	DeepSeek	Other compatible platforms
POST /v1/messages	Protocol bridge	Protocol bridge	Gateway conversion	Native or Gateway conversion
POST /v1/chat/completions	OpenAI-compatible handler	OpenAI-compatible handler	OpenAI-compatible handler	Gateway conversion when supported
POST /v1/responses	Supported	Supported	Unsupported, returns 404	Gateway conversion when supported
GET /v1/responses	Responses WebSocket	Responses WebSocket	Unsupported	Unsupported
POST /v1/embeddings	Supported	Unsupported	Unsupported	Unsupported
POST /v1/messages/count_tokens	Bridged count	Local estimate	Unsupported	Native counting path
POST /v1/images/generations	Supported	Supported	Unsupported	Unsupported
POST /v1/images/edits	Supported	Supported	Unsupported	Unsupported
POST /v1/videos/generations	Unsupported	Supported	Unsupported	Unsupported

“Other compatible platforms” includes Anthropic, Gemini, Vertex, and related platforms handled natively or through Gateway conversion. Account, channel, model, and group configuration still determine actual availability.

Native Gemini endpoints

Gemini SDK and Gemini CLI use /v1beta:

Method	Path	Purpose
GET	/v1beta/models	List models
GET	/v1beta/models/:model	Get one model
POST	/v1beta/models/{model}:generateContent	Non-streaming generation
POST	/v1beta/models/{model}:streamGenerateContent	Streaming generation

The Key must bind to a group that can handle the Gemini protocol and requested model.

Usage, Live, and model lists

• GET /v1/models returns models available to the Key; Codex can include client_version for its client manifest.
• GET /v1/usage returns usage information for the Key.
• POST /v1/live and GET /v1/live/:call_id serve supported Codex/OpenAI live workflows.
• Aliases without /v1, including /responses, /models, and /messages/count_tokens, exist for clients that explicitly require those paths.

Composite groups

Composite is still one group. Gateway resolves the target platform from model mapping and then applies the endpoint rules above. An OpenAI model in a Composite group can use Embeddings, while a model resolved to Grok does not gain Embeddings from the group type.

Choose an interface

1. Confirm the platform of the group bound to the Key.
2. Confirm the model is exposed by that group or its Composite mapping.
3. Choose the OpenAI, Anthropic Messages, or Gemini v1beta interface.
4. When uncertain, send a minimal request and inspect the original status in usage records.