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.

Unreal Speech publishes 3 APIs on the APIs.io network: Speech API, Stream API, and Synthesis Tasks API. Tagged areas include Text to Speech, TTS, Speech Synthesis, Audio, and Voice.

Unreal Speech’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
36.4/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
3 APIs
Text to SpeechTTSSpeech SynthesisAudioVoiceAI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 36.4/100 · thin
Contract Quality 15.9 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/unrealspeech: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

Unreal Speech Speech API

Synchronous text-to-speech returning an MP3 and timestamp URLs.

Unreal Speech Stream API

Low-latency HTTP streaming synthesis returning audio bytes.

Unreal Speech Synthesis Tasks API

Asynchronous synthesis for long-form audio via submit-and-poll.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Unreal Speech API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Unrealspeech Plans Pricing

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Unrealspeech Rate Limits

7 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Unrealspeech Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Unrealspeech Authentication

http · 1 scheme

SECURITY

Unrealspeech Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Unrealspeech Agentic Access

4 operations · 3 acting

4 operations · 3 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: unrealspeech
url: https://raw.githubusercontent.com/api-evangelist/unrealspeech/refs/heads/main/apis.yml
name: Unreal Speech
kind: company
description: 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.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/unrealspeech.png
tags:
- Text to Speech
- TTS
- Speech Synthesis
- Audio
- Voice
- AI
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.19'
apis:
- aid: unrealspeech:unrealspeech-speech-api
  name: Unreal Speech Speech API
  description: Synchronous text-to-speech returning an MP3 and timestamp URLs.
  humanURL: https://docs.unrealspeech.com/reference/speech
  baseURL: https://api.v7.unrealspeech.com
  tags:
  - Speech
  properties:
  - type: OpenAPI
    url: openapi/unrealspeech-speech-api-openapi.yml
  - type: Documentation
    url: https://docs.unrealspeech.com/reference/getting-started-with-our-api
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/speech
  - type: PostmanCollection
    url: collections/unrealspeech.postman_collection.json
  - type: OpenCollection
    url: collections/unrealspeech.opencollection.json
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/stream
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/synthesistasks
- aid: unrealspeech:unrealspeech-stream-api
  name: Unreal Speech Stream API
  description: Low-latency HTTP streaming synthesis returning audio bytes.
  humanURL: https://docs.unrealspeech.com/reference/speech
  baseURL: https://api.v7.unrealspeech.com
  tags:
  - Stream
  properties:
  - type: OpenAPI
    url: openapi/unrealspeech-stream-api-openapi.yml
  - type: Documentation
    url: https://docs.unrealspeech.com/reference/getting-started-with-our-api
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/speech
  - type: PostmanCollection
    url: collections/unrealspeech.postman_collection.json
  - type: OpenCollection
    url: collections/unrealspeech.opencollection.json
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/stream
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/synthesistasks
- aid: unrealspeech:unrealspeech-synthesis-tasks-api
  name: Unreal Speech Synthesis Tasks API
  description: Asynchronous synthesis for long-form audio via submit-and-poll.
  humanURL: https://docs.unrealspeech.com/reference/speech
  baseURL: https://api.v7.unrealspeech.com
  tags:
  - Synthesis Tasks
  properties:
  - type: OpenAPI
    url: openapi/unrealspeech-synthesis-tasks-api-openapi.yml
  - type: Documentation
    url: https://docs.unrealspeech.com/reference/getting-started-with-our-api
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/speech
  - type: PostmanCollection
    url: collections/unrealspeech.postman_collection.json
  - type: OpenCollection
    url: collections/unrealspeech.opencollection.json
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/stream
  - type: APIReference
    url: https://docs.unrealspeech.com/reference/synthesistasks
common:
- type: AgenticAccess
  url: agentic-access/unrealspeech-agentic-access.yml
- type: DomainSecurity
  url: security/unrealspeech-domain-security.yml
- type: Authentication
  url: authentication/unrealspeech-authentication.yml
- type: GitHubOrganization
  url: https://github.com/unrealspeech
- type: LinkedIn
  url: https://www.linkedin.com/company/unrealspeech
- type: Website
  url: https://unrealspeech.com
- type: Documentation
  url: https://docs.unrealspeech.com
- type: Plans
  url: plans/unrealspeech-plans-pricing.yml
- type: RateLimits
  url: rate-limits/unrealspeech-rate-limits.yml
- type: FinOps
  url: finops/unrealspeech-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com