x402engine — Voxtral Mini TTS through OpenRouter; 30 voices, MP3 audio, up to 20
x402engine — Voxtral Mini TTS through OpenRouter; 30 voices, MP3 audio, up to 2000 UTF-8 bytes of text
Answeringour last check, 2026-10-10
1 of 1checks answered this week
328 msmedian answer time
$0.06listed price per call
$0.06price it asked us
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://x402engine.app/api/tts/openrouter
| Category | Image and media |
|---|---|
| Provider host | x402engine.app |
| Networks | eip155:4326, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.06 | 328 ms |
Example input (from the provider)
{
"body": {
"format": "mp3",
"text": "Hello world",
"voice": "en_paul_neutral"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"format": {
"default": "mp3",
"description": "Fixed MP3 output",
"enum": [
"mp3"
],
"type": "string"
},
"text": {
"description": "Non-empty text, at most 2000 UTF-8 bytes",
"example": "Hello world",
"type": "string"
},
"voice": {
"default": "en_paul_neutral",
"description": "Voxtral preset voice",
"enum": [
"en_paul_sad",
"en_paul_neutral",
"en_paul_happy",
"en_paul_frustrated",
"en_paul_excited",
"en_paul_confident",
"en_paul_cheerful",
"en_paul_angry",
"gb_oliver_neutral",
"gb_oliver_sad",
"gb_oliver_excited",
"gb_oliver_curious",
"gb_oliver_confident",
"gb_oliver_cheerful",
"gb_oliver_angry",
"gb_jane_sarcasm",
"gb_jane_confused",
"gb_jane_shameful",
"gb_jane_sad",
"gb_jane_neutral",
"gb_jane_jealousy",
"gb_jane_frustrated",
"gb_jane_curious",
"gb_jane_confident",
"fr_marie_sad",
"fr_marie_neutral",
"fr_marie_happy",
"fr_marie_excited",
"fr_marie_curious",
"fr_marie_angry"
],
"type": "string"
}
},
"required": [
"text"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"bodyType",
"body",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"audio": {
"description": "Base64-encoded audio bytes. Decode to save or play the audio.",
"type": "string"
},
"format": {
"description": "The audio encoding selected for this request.",
"type": "string"
}
},
"required": [
"audio",
"format"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}