---
title: "Create Realtime Transcription Session"
method: POST
path: "/realtime/transcription_sessions"
tags: ["realtime"]
---

# Create Realtime Transcription Session

`POST /realtime/transcription_sessions`

## Request

- Base URL: `https://api.sea-lion.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.sea-lion.ai/realtime/transcription_sessions`
- Auth: API key in header `x-litellm-api-key`

Create an ephemeral Realtime transcription session
(POST /v1/realtime/transcription_sessions) for the WebRTC/WebSocket flow.

Mirrors the client_secrets route but targets the transcription_sessions
endpoint and encrypts the ephemeral key returned under `client_secret.value`.

## Response `200`

Successful Response

- RealtimeTranscriptionSessionResponse: Response from POST /v1/realtime/transcription_sessions. `client_secret.value` contains the encrypted token instead of the raw ephemeral key. Unknown fields pass through unchanged.
  - `client_secret` object, nullable

## Changes

- **2026-10-21** `f2fb14eab3f5`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/sea-lion/apis/litellm-api/changes/realtime/transcription_sessions/post.md)

---

[API](https://skmtc.dev/sea-lion/apis/litellm-api.md) · [All operations](https://skmtc.dev/sea-lion/apis/litellm-api/llms.txt) · [OpenAPI document](https://skmtc.dev/sea-lion/apis/litellm-api/revisions/1ba9123c189a?raw)