Overview

ResponsiveVoice REST API

The ResponsiveVoice REST API generates speech audio from any language or platform — no website required. Use it for:

• Server-side audio generation
• Mobile apps (Android, iOS) and other non-browser clients
• Batch processing of text to speech
• Platforms without Web Speech API support

Base URL: https://texttospeech.responsivevoice.org/v2

Prefer a client library

A client library wraps these endpoints with typing, retries, and streaming. For TypeScript or Node, use @responsivevoice/api-client. From a language without a client library, call the REST endpoints directly as documented below.

Tip

Building a website rather than calling the API directly? Embed @responsivevoice/core instead — it speaks via the browser's Web Speech API and only falls back to this REST API when needed.

Features

• Multilingual built-in voice catalog
• Streaming support via HTTP audio streaming and WebSocket streaming
• BYOK premium providers — bring your own provider API keys for premium voices
• CDN-cacheable GET endpoint for efficient audio delivery
• HATEOAS navigation links in voice responses

Interactive Documentation

Explore the API interactively with the Scalar API Reference.

The full OpenAPI specification is available at /openapi.json — import it into Postman, Insomnia, or other API tools.

Endpoint Reference

Detailed endpoint documentation is auto-generated from the OpenAPI specification — see the Endpoint Reference.

V1 Deprecation

V1 is deprecated. Only GET /v1/text:synthesize remains for backward compatibility with the legacy JS client. All new integrations should use the v2 endpoints documented in the Endpoint Reference.