API Overview
Base URLs, endpoint matrix, model policy, and billing behavior
Authentication
API keys, headers, and SDK auth conventions
OpenAI-compatible API
Chat Completions, Responses, and model list endpoints
Anthropic-native API
Messages API for Claude Code and Anthropic SDKs
Gemini-native API
Generate Content for Google Gen AI SDKs
Supported Models
Current Claude, GPT, and Gemini ids
Errors and Rate Limits
Status codes, quota errors, and troubleshooting
Balance and Usage
Prepaid balance, key caps, and usage records
Public API scope
The public developer API currently documents these supported surfaces:
Image generation, audio, embeddings, rerank, fine-tuning, files, and batches are
not part of the current public OmniaKey documentation. If an upstream-compatible
path exists internally, do not treat it as a public capability until it appears
in this docs site and the dashboard model catalog.