Turn written text into spoken audio you can drop straight into a player or app
Turn written text into spoken audio you can drop straight into a player or app. Send text (up to 4,000 characters) with an optional voice, model, speed, and output format of mp3, wav, opus, aac, or flac, and get back a hosted audio_url plus file size and content type, no base64 handling required. Runs on Venice's text-to-speech models with 30+ selectable voices and adjustable playback speed from 0.25x to 4x. Use it as a text-to-speech API, voice synthesis tool, or narration generator for voiceovers, IVR prompts, or accessibility read-aloud features.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://x402.agentutility.ai/voice
| Category | Image and media |
|---|---|
| Provider host | x402.agentutility.ai |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"text": "Hello there.",
"voice": "af_sky"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"format": {
"description": "Output audio format: mp3, wav, opus, aac, or flac. Optional, default mp3.",
"type": "string"
},
"model": {
"description": "TTS model id. Optional, default 'tts-kokoro'.",
"type": "string"
},
"speed": {
"description": "Playback speed multiplier. Optional, 0.25-4, default 1.",
"type": "number"
},
"text": {
"description": "Text to synthesize into speech. Max 4000 chars.",
"type": "string"
},
"voice": {
"description": "Voice id, e.g. 'af_sky'. Optional, default 'af_sky'.",
"type": "string"
}
},
"required": [
"text"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"audio_url": {
"type": "string"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}