Unreal Speech

Unreal Speech is a low-cost, high-scale text-to-speech (TTS) API for turning text into natural-sounding speech. It exposes a small REST surface - a low-latency HTTP streaming endpoint, a synchronous speech endpoint that returns an MP3 plus per-word or per-sentence timestamps, and an asynchronous synthesis tasks endpoint for long-form audio up to 500,000 characters. Requests are authenticated with a Bearer API key issued from the dashboard, and pricing is metered per character with a free monthly allowance.

3 APIs 0 Features
Text to SpeechTTSSpeech SynthesisAudioVoiceAI

APIs

Unreal Speech Speech API

Synchronous text-to-speech for medium-length text (up to 3,000 characters). Returns an MP3 audio URL plus word- or sentence-level timestamp URLs, with selectable voice, bitrate,...

Unreal Speech Stream API

Low-latency HTTP streaming synthesis for short text (up to 1,000 characters), returning audio bytes directly in the response - typically in around 0.3 seconds - for time-sensiti...

Unreal Speech Synthesis Tasks API

Asynchronous synthesis for long-form audio (up to 500,000 characters, e.g. audiobooks and articles). Submit text and immediately receive a TaskId, then poll the task to retrieve...

Collections

Unreal Speech API

OPEN

Pricing Plans

Unrealspeech Plans Pricing

6 plans

PLANS

Rate Limits

Unrealspeech Rate Limits

7 limits

RATE LIMITS

FinOps

Unrealspeech Finops

FINOPS

Resources

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DomainSecurity
DomainSecurity
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Authentication
Authentication
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GitHubOrganization
GitHubOrganization
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LinkedIn
LinkedIn
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Website
Website
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Documentation
Documentation
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Plans
Plans
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RateLimits
RateLimits
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FinOps
FinOps

Sources

Raw ↑ 
opencollection: 1.0.0
info:
  name: Unreal Speech API
  version: v7
request:
  auth:
    type: bearer
    token: '{{apiKey}}'
items:
- info:
    name: Speech
    type: folder
  items:
  - info:
      name: Create speech (synchronous).
      type: http
    http:
      method: POST
      url: https://api.v7.unrealspeech.com/speech
      body:
        type: json
        data: "{\n  \"Text\": \"This is a test.\",\n  \"VoiceId\": \"Scarlett\",\n  \"Bitrate\": \"192k\",\n  \"Speed\": \"\
          0\",\n  \"Pitch\": \"1\",\n  \"TimestampType\": \"sentence\"\n}"
    docs: Synthesizes up to 3,000 characters and returns an MP3 audio URL plus timestamp URLs.
- info:
    name: Stream
    type: folder
  items:
  - info:
      name: Stream speech (low latency).
      type: http
    http:
      method: POST
      url: https://api.v7.unrealspeech.com/stream
      body:
        type: json
        data: "{\n  \"Text\": \"This is a test.\",\n  \"VoiceId\": \"Scarlett\",\n  \"Bitrate\": \"192k\",\n  \"Speed\": \"\
          0\",\n  \"Pitch\": \"1\",\n  \"Codec\": \"libmp3lame\",\n  \"Temperature\": 0.25\n}"
    docs: Synthesizes up to 1,000 characters and streams audio bytes back in the HTTP response (chunked). HTTP streaming,
      not a WebSocket.
- info:
    name: Synthesis Tasks
    type: folder
  items:
  - info:
      name: Create synthesis task (async).
      type: http
    http:
      method: POST
      url: https://api.v7.unrealspeech.com/synthesisTasks
      body:
        type: json
        data: "{\n  \"Text\": \"This is a long-form test.\",\n  \"VoiceId\": \"Scarlett\",\n  \"Bitrate\": \"192k\",\n  \"\
          Speed\": \"0\",\n  \"Pitch\": \"1\",\n  \"TimestampType\": \"sentence\"\n}"
    docs: Submits up to 500,000 characters and immediately returns a TaskId. Optionally include a CallbackUrl for status webhooks.
  - info:
      name: Get synthesis task status.
      type: http
    http:
      method: GET
      url: https://api.v7.unrealspeech.com/synthesisTasks?TaskId=
      params:
      - name: TaskId
        value: ''
        type: query
        description: The identifier returned when the task was created.
    docs: Polls the status of a synthesis task by TaskId; returns output audio URI(s) when complete.
bundled: true