Convert text to natural speech audio (MP3, WAV or OGG) with neural Piper voices
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.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
890 msmedian answer time
$0.04listed price per call
$0.04price 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://agentsvc.io/api/v1/proxy/tts
| Category | Image and media |
|---|---|
| Provider host | agentsvc.io |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 10 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.04 | 890 ms |
Example input (from the provider)
{
"body": {
"text": "Hello from agentsvc. Your report is ready.",
"voice": "en-female"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"format": {
"default": "mp3",
"enum": [
"mp3",
"wav",
"ogg"
],
"type": "string"
},
"language": {
"enum": [
"en",
"de"
],
"type": "string"
},
"speed": {
"default": 1,
"maximum": 2,
"minimum": 0.5,
"type": "number"
},
"text": {
"type": "string"
},
"voice": {
"enum": [
"en-female",
"en-male",
"de-male"
],
"type": "string"
}
},
"required": [
"text"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"audio_base64": {
"type": "string"
},
"characters": {
"type": "integer"
},
"duration_seconds": {
"type": "number"
},
"format": {
"type": "string"
},
"gender": {
"type": "string"
},
"language": {
"type": "string"
},
"mime_type": {
"type": "string"
},
"size_bytes": {
"type": "integer"
},
"voice": {
"type": "string"
},
"voice_license": {
"type": "string"
}
},
"required": [
"format",
"duration_seconds",
"audio_base64"
],
"type": "object"
},
"success": {
"type": "boolean"
}
},
"required": [
"success",
"data"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}