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ForgeMesh Custom Text-to-Speech (x402)
x402
ForgeMesh Custom Text-to-Speech (x402) is a paid API for AI agents from tts.forgemesh.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Converts text to high-quality WAV audio in 31 languages using expressive voice personas with configurable speed and quality, paid per-call via x402 USDC micropayment.
Price / call$0.005
Success—
StatusUnknown
How this service works
Paid text-to-speech via x402. WAV audio in 31 languages, OpenAI-compatible, no API keys.
Output
Returns a 44.1kHz 16-bit mono WAV audio file inline as audio/wav content, containing the synthesized speech corresponding to the submitted text, ready for playback or downstream processing.
Example use cases
Multilingual e-learning narration
“Take this lesson intro paragraph and generate spoken audio in Japanese using the Narrator voice at standard quality and normal speed: 'このコースでは、基本的なプログラミングの概念を学びます。'”
Urgent announcement voiceover
“Convert this safety alert into speech using the Urgent voice persona in English at fast speed and draft quality: 'All personnel must evacuate the building immediately via the nearest exit.'”
Storytelling podcast audio
“Generate a high-quality audio clip in French with the Storyteller voice at slow speed and ultra quality for this opening scene: 'Il était une fois, dans une forêt lointaine, un jeune garçon nommé Léon qui rêvait de voyager.'”
Technical details
Endpoint
POSThttps://tts.forgemesh.io/v1/tts/customWhen to prefer
Choose this endpoint when you need pay-per-call TTS with no API key or account setup, require broad multilingual coverage (31 languages), want expressive persona voices beyond generic TTS, or need fine-grained control over speech speed and synthesis quality. Ideal for agents operating in micropayment-native (x402) environments or when avoiding subscription-based TTS APIs.
Side effects
- Payment failure if x402 USDC funds are insufficient — HTTP 402 returned
- Text exceeds 2000 character limit — validation error
- Unsupported language code submitted — enum validation error
- Speed outside 0.7–2.0 range — validation error
- Steps outside 1–100 range — validation error
- Persona voice requested on non-Custom tier — access denied or fallback
- Empty or missing text field — validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lang | string | Language code; 31 languages supported |
| text | string | Text to synthesize into speech, max 2000 characters. Use non-long routes for 1-500 chars and -long routes for 501-2000 chars. |
| speed | number | Pro/Custom expressive speed control, 0.7-2.0. Presets: slow 0.7, normal 1.0, fast 1.3, rapid 1.6 |
| steps | integer | Pro/Custom quality control, 1-100. Presets: draft 4, standard 8, high 16, ultra 24 |
| voice | string | Voice name. Standard voices M1-M5/F1-F5; persona voices require Custom tier. |
Output
Schema · Response
{
"type": "json",
"example": {
"description": "44.1kHz 16-bit mono WAV speech audio returned inline",
"content_type": "audio/wav"
}
}Tags
x402
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