OpenAI

OpenAI Realtime API

The Realtime API enables low-latency, bidirectional communication with models that natively support speech-to-speech interactions as well as multimodal inputs (audio, images, and text) and outputs (audio and text). It supports WebRTC, WebSocket, and SIP connection methods for real-time voice agents and conversational interfaces. The Realtime API is represented as a dedicated tag group in the upstream OpenAI OpenAPI specification with operations covering client/server events, translation client secrets, and voice call lifecycle (accept, hangup, refer, reject).

Documentation GitHub OpenAPI

Operations 9

POST /realtime/calls Create a new Realtime API call over WebRTC and receive the SDP answer needed to… #

POST /realtime/calls/{call_id}/accept Accept an incoming SIP call and configure the realtime session that will handle… #

POST /realtime/calls/{call_id}/hangup End an active Realtime API call, whether it was initiated over SIP or WebRTC #

POST /realtime/calls/{call_id}/refer Transfer an active SIP call to a new destination using the SIP REFER verb #

POST /realtime/calls/{call_id}/reject Decline an incoming SIP call by returning a SIP status code to the caller #

POST /realtime/client_secrets Create a Realtime client secret with an associated session configuration. #

POST /realtime/sessions Create an ephemeral API token for use in client-side applications with the… #

POST /realtime/transcription_sessions Create an ephemeral API token for use in client-side applications with the… #

POST /realtime/translations/client_secrets Create a Realtime translation client secret with an associated translation… #

Documentation

https://platform.openai.com/docs/api-reference/realtime

https://platform.openai.com/docs/guides/realtime

https://platform.openai.com/docs/guides/realtime-webrtc

https://platform.openai.com/docs/guides/realtime-server-controls

https://developers.openai.com/api/docs/guides/realtime-conversations/

https://platform.openai.com/docs/assistants/overview

https://platform.openai.com/docs/api-reference/assistants

https://platform.openai.com/docs/guides/text-to-speech

https://platform.openai.com/docs/api-reference/audio

https://platform.openai.com/docs/guides/speech-to-text

https://developers.openai.com/api/docs/guides/audio/

https://developers.openai.com/api/docs/guides/voice-agents/

https://platform.openai.com/docs/api-reference/chat

https://platform.openai.com/docs/guides/embeddings

https://platform.openai.com/docs/api-reference/embeddings

https://platform.openai.com/docs/api-reference/files

https://platform.openai.com/docs/guides/fine-tuning

https://platform.openai.com/docs/api-reference/fine-tuning

https://platform.openai.com/docs/guides/images

https://platform.openai.com/docs/api-reference/images

https://platform.openai.com/docs/guides/image-generation

https://platform.openai.com/docs/guides/images-vision

https://platform.openai.com/docs/models

https://platform.openai.com/docs/api-reference/models

https://platform.openai.com/docs/assistants/how-it-works/managing-threads-and-messages

https://platform.openai.com/docs/api-reference/threads

https://platform.openai.com/docs/api-reference/completions

Specifications

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/openapi/openai-realtime-api-openapi.yml

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/asyncapi/openai-realtime-asyncapi.yml

SDKs

GitHubRepository

https://github.com/openai/openai-realtime-agents

Schemas & Data

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-schema/openai-chat-completion-schema.json

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-schema/openai-embedding-schema.json

Other Resources

https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-ld/openai-context.jsonld

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OpenAPI Specification

openapi: 3.2.0
info:
  title: OpenAI Realtime API
  description: The OpenAI REST API. Please see https://platform.openai.com/docs/api-reference for more details.
  version: 2.3.0
  termsOfService: https://openai.com/policies/terms-of-use
  contact:
    name: OpenAI Support
    url: https://help.openai.com/
  license:
    name: MIT
    url: https://github.com/openai/openai-openapi/blob/master/LICENSE
servers:
- url: https://api.openai.com/v1
security:
- ApiKeyAuth: []
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/openapi/openai-realtime-api-openapi.yml