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Respeecher Space Real-Time TTS API

Low-latency real-time text-to-speech that begins streaming audio in under 200ms via three transports - one-shot bytes (POST /tts/bytes, up to ~5,000 characters), HTTP SSE chunks (POST /tts/sse), and a bidirectional WebSocket channel (wss://api.respeecher.com/v1/public/tts/en-rt, GET /tts/websocket) that streams input text and output audio keyed by context_id. English (en-rt) and Ukrainian (ua-rt) models, X-API-Key auth, official Python and TypeScript SDKs, and LiveKit, Pipecat, Ultravox, and VAPI integrations.

Respeecher Space Real-Time TTS API is one of 17 APIs that Respeecher publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include Real Time, Streaming, WebSocket, and Text to Speech. The published artifact set on APIs.io includes API documentation, an API reference, and an AsyncAPI specification.

This event API exposes 2 operations across 1 channel, and defines 2 schemas. It is described by AsyncAPI 2.6.0, at version 1.0.0.

The API connects through 2 servers: api.respeecher.com/v1/public/tts/en-rt (wss), api.respeecher.com/v1/public/tts/ua-rt (wss).

2 operations 1 channels 2 schemas

Metadata

The identity and technical contract details declared by the specification.

Specification
AsyncAPI 2.6.0
API Version
1.0.0
Base URL
https://api.respeecher.com/v1/public/tts/en-rt
Resource Areas
1

Channels & Operations 2

Across 1 channel, the API surfaces 2 operations. Each is listed below with its action, channel, parameters, and response codes.

Channels 2
SUB
/tts/websocket
Server streams synthesized audio back to the client.
receiveAudioFrame body
PUB
/tts/websocket
Client sends text to synthesize on this connection.
sendGenerationRequest body

Messages & Schemas 2

The contract defines 2 schemas that model the data carried by its messages. Each schema is shown below with its type and property counts.

GenerationRequest
message
AudioFrame
message

Specification

The full machine-readable AsyncAPI contract behind this narrative.

Source

respeecher-asyncapi.yml Raw ↑

Other APIs Respeecher publishes across the network.

Respeecher accents API
Respeecher auth API
Respeecher calibration API
Respeecher credits API
Respeecher folders API
Respeecher healtz API
Respeecher models API
Respeecher narration-styles API
Respeecher notes API
Respeecher orders API
Respeecher projects API
Respeecher recordings API