Index onlineMerchant portal
Api Endpoint

Automaton Media APIs

Text to speech (TTS) API: natural English speech with 28 voices (American and British, female and male; Kokoro-82M, open-licensed). Returns MP3 or WAV. Default voice af_heart; list voices at GET /v1/voices. Runs at about real time: 1,000 characters take about a minute. Priced per character.

Open interactive test console

Offering

Provider
api.language123.net
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://api.language123.net/v1/tts
MIME type
Not provided
First seen
2026-10-16T01:50:24.663Z
Last seen
Tags
text-to-speech, tts, voice, speech synthesis, english

Website

Payment pricing

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

Payment option 1
0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0x0360F2276f55A7430667134577D396CD76ffDDfe"
  }
]

Observed health

Status
Healthy
Latest latency
2500 ms
Average latency
2130 ms
HTTP status
204
Last checked
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": {
      "properties": {
        "format": {
          "enum": [
            "mp3",
            "wav"
          ],
          "type": "string"
        },
        "speed": {
          "maximum": 2,
          "minimum": 0.5,
          "type": "number"
        },
        "text": {
          "description": "Text to speak (price is per 1,000 characters)",
          "type": "string"
        },
        "voice_id": {
          "description": "Voice from GET /v1/voices (default af_heart when available)",
          "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",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "contentEncoding": "binary",
      "contentMediaType": "audio/mpeg",
      "type": "string"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}