---
title: "Stream Speech"
method: POST
path: "/v1/speech/stream"
tags: ["textToSpeech"]
---

# Stream Speech

`POST /v1/speech/stream`

Synthesize speech with ultra-low latency over a streaming connection.
Choose the `Base URL` from the URL dropdown (Global URL or a pinned Region)

<Warning>
Our legacy Gen2 streaming model is set to be deprecated on 16th August 2026. Please migrate to the latest [Falcon 2](/api/docs/text-to-speech-models/falcon-2) model.
</Warning>

**Note**: Global URL auto-routes to the nearest region.
| Region         | URL                                       | Default Concurrency |
| ------------------------- | ---------------------------------------------- | -------------------- |
| Global (Routes to the nearest server) | `https://global.api.murf.ai/v1/speech/stream`     | Region specific concurrency |
| US-East                   | `https://us-east.api.murf.ai/v1/speech/stream`    | 15 |
| US-West                   | `https://us-west.api.murf.ai/v1/speech/stream`    | 2 |
| India                     | `https://in.api.murf.ai/v1/speech/stream`         | 2 |
| Canada                    | `https://ca.api.murf.ai/v1/speech/stream`         | 2 |
| South Korea               | `https://kr.api.murf.ai/v1/speech/stream`         | 2 |
| UAE                       | `https://me.api.murf.ai/v1/speech/stream`         | 2 |
| Japan                     | `https://jp.api.murf.ai/v1/speech/stream`         | 2 |
| Australia                 | `https://au.api.murf.ai/v1/speech/stream`         | 2 |
| EU (Central)              | `https://eu-central.api.murf.ai/v1/speech/stream` | 2 |
| UK                        | `https://uk.api.murf.ai/v1/speech/stream`         | 2 |
| South America (São Paulo) | `https://sa-east.api.murf.ai/v1/speech/stream`    | 2 |

## Headers

- `api-key` string

## Request body

- GenerateSpeechStreamingRequest
  - `model` string — The model to use for audio output. Defaults to falcon-2 for all the regions except US-East. Valid values: falcon-2, gen2. <Warning> Our legacy Gen2 streaming model is set to be deprecated on 16th August 2026. Please migrate to the latest [Falcon 2](/api/docs/text-to-speech-models/falcon-2) model. </Warning>
  - `channelType` string — Valid values: STEREO, MONO
  - `format` string — Format of the generated audio file.Valid values: MP3, FLAC, WAV, ALAW, ULAW, OGG, PCM
  - `multiNativeLocale` string — This field is superseded by `locale` field. Please migrate to `locale` field to ensure compatibility with future API versions. Specifies the language for the generated audio, enabling a voice to speak in multiple languages natively. Valid values: "en-US", "en-UK", "es-ES", etc. Use the GET /v1/speech/voices endpoint to retrieve the list of available voices and languages.
  - `locale` string — Specifies the language for the generated audio, enabling a voice to speak in multiple languages natively. Valid values: "en-US", "en-UK", "es-ES", etc. Use the GET /v1/speech/voices endpoint to retrieve the list of available voices and languages.
  - `pitch` integer — Pitch of the voiceover
  - `rate` integer — Speed of the voiceover
  - `sampleRate` number, double — Valid values are 8000, 16000, 24000, 44100, 48000. Defaults to 24000 for Falcon 2 model and 44100 for Gen2 model.
  - `style` string — The voice style to be used for voiceover generation.
  - `text` string, required — The text that is to be synthesised. e.g. 'Hello there [pause 1s] friend'
  - `variation` integer — Higher values will add more variation in terms of Pause, Pitch, and Speed to the voice. Only available for Gen2 model.
  - `voiceId` string, required — Use the GET /v1/speech/voices API to find supported voiceIds. You can use either the voiceId (e.g. en-US-natalie) or just the voice actor's name (e.g. natalie).

## Response `200`

Ok

- TextToSpeechStreamResponse200 — Empty response body

## Other responses

- `400` — Bad Request
- `402` — Expired subscription or character limit exhausted
- `403` — Invalid or expired token/api-key provided
- `500` — Internal Server Error
- `503` — Service Unavailable

---

[API](https://skmtc.net/murf/apis/api-reference.md) · [All operations](https://skmtc.net/murf/apis/api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/murf/api-reference/revisions/07a6cdc0774e/schema)