Api Endpoint

x402engine.app

x402engine — Voxtral Mini TTS through OpenRouter; 30 voices, MP3 audio, up to 2000 UTF-8 bytes of text

Open interactive test console

Offering

Provider: x402engine.app
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Creative
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://x402engine.app/api/tts/openrouter
MIME type: Not provided
First seen: 2026-10-16T01:54:06.400Z
Last seen: 2026-11-01T15:22:27.912Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.06 USDC
Atomic price: 60000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 60000000000000000 atomic units
Atomic price: 60000000000000000 · Network: eip155:4326 · Asset: 0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7 · Scheme: exact
Payment option 3: 0.06 USDC
Atomic price: 60000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "60000",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629"
  },
  {
    "scheme": "exact",
    "network": "eip155:4326",
    "asset": "0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7",
    "amount": "60000000000000000",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "60000",
    "payTo": "Gzehfseq1k9AcHFSoV7qHmDGQx92nLMw78XXdqVWQQWa"
  }
]

Observed health

Status: Healthy
Latest latency: 131 ms
Average latency: 509 ms
HTTP status: 204
Last checked: 2026-11-05T03:25:24.295Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "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 schema

{
  "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"
}