Index onlineMerchant portal
Api Endpoint

Text to Speech

Convert text to natural speech audio (MP3, WAV or OGG) with neural Piper voices: en-female, en-male (US English) and de-male (German); all voices public domain or CC0, so the audio can be used commercially. Params: text (required, max 2000 characters), voice (default en-female, or picked from language), language (en or de), speed (0.5 to 2, default 1), format (mp3 default, wav, ogg). Returns audio_base64 and duration.

Open interactive test console

Offering

Provider
agentsvc.io
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://agentsvc.io/api/v1/proxy/tts
MIME type
application/json
First seen
2026-10-16T01:50:19.913Z
Last seen
Tags
text-to-speech, speech-synthesis, tts, speech, audio

Website

Payment pricing

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

Payment option 1
0.04 USDC
Atomic price: 40000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.04 USDC
Atomic price: 40000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3
0.04 USDC
Atomic price: 40000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 4
0.04 USDC
Atomic price: 40000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "40000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "40000",
    "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "40000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "40000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  }
]

Observed health

Status
Healthy
Latest latency
308 ms
Average latency
949 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

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "properties": {
        "text": {
          "type": "string"
        },
        "voice": {
          "type": "string",
          "enum": [
            "en-female",
            "en-male",
            "de-male"
          ]
        },
        "language": {
          "type": "string",
          "enum": [
            "en",
            "de"
          ]
        },
        "speed": {
          "type": "number",
          "minimum": 0.5,
          "maximum": 2,
          "default": 1
        },
        "format": {
          "type": "string",
          "enum": [
            "mp3",
            "wav",
            "ogg"
          ],
          "default": "mp3"
        }
      },
      "required": [
        "text"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "required": [
        "success",
        "data"
      ],
      "properties": {
        "success": {
          "type": "boolean"
        },
        "data": {
          "type": "object",
          "properties": {
            "format": {
              "type": "string"
            },
            "mime_type": {
              "type": "string"
            },
            "duration_seconds": {
              "type": "number"
            },
            "size_bytes": {
              "type": "integer"
            },
            "voice": {
              "type": "string"
            },
            "language": {
              "type": "string"
            },
            "gender": {
              "type": "string"
            },
            "voice_license": {
              "type": "string"
            },
            "characters": {
              "type": "integer"
            },
            "audio_base64": {
              "type": "string"
            }
          },
          "required": [
            "format",
            "duration_seconds",
            "audio_base64"
          ]
        }
      }
    }
  },
  "required": [
    "type"
  ]
}