---
title: "Azure Speech Proxy Route"
method: POST
path: "/azure_speech/{endpoint}"
tags: ["Azure AI Speech Pass-through", "pass-through"]
---

# Azure Speech Proxy Route

`POST /azure_speech/{endpoint}`

Pass-through for the Azure AI Speech REST APIs (speech to text), e.g.
`POST /azure_speech/speech/recognition/conversation/cognitiveservices/v1?language=en-US`
with the raw audio as the body, or `POST /azure_speech/speechtotext/v3.2/transcriptions`.

The body is forwarded byte for byte and the proxy injects its own
`Ocp-Apim-Subscription-Key`; the caller's `Authorization` header is the LiteLLM key
and is never forwarded.

[Docs](https://docs.litellm.ai/docs/pass_through/azure_speech)

## Path parameters

- `endpoint` string, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

## Changes

- **2026-10-05** `611a0ed75fe8` — 3 info
  - api tag `Azure AI Speech Pass-through` added
  - api tag `pass-through` added
  - api tag `llm_passthrough` removed
- **2026-10-04** `51c2ca10dc0b` — 3 info
  - api tag `llm_passthrough` added
  - api tag `Azure AI Speech Pass-through` removed
  - api tag `pass-through` removed
- **2026-10-03** `c94c9b11f95e` — 3 info
  - api tag `Azure AI Speech Pass-through` added
  - api tag `pass-through` added
  - api tag `llm_passthrough` removed
- **2026-09-30** `85ac4287140e` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/flock/apis/litellm-api/changes/azure_speech/:endpoint/post.md)

---

[API](https://skmtc.dev/flock/apis/litellm-api.md) · [All operations](https://skmtc.dev/flock/apis/litellm-api/llms.txt) · [OpenAPI document](https://skmtc.dev/flock/apis/litellm-api/revisions/ee3a9ebe33fd?raw)