Retrieve a comprehensive list of all supported realtime voice providers, their available models, supported languages, voice configurations, and required environment variables.
x-api-key header to authenticate this request.providers array. Currently, the API supports leading realtime engines including OpenAI, Gemini, Ultravox, and xAI Grok.
Each provider object contains the following nested data:
models: The specific realtime models available (e.g., gpt-realtime, gemini-2.5-flash-native-audio).languages: Found inside each model object, this is an extensive array of supported ISO language codes (like en, es, hi, ja) indicating what languages the model can natively understand and speak.voices: The available voice identities you can apply to the agent.