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ForgeMesh Voice Pro Long-Form TTS
x402
ForgeMesh Voice Pro Long-Form TTS is a paid API for AI agents from voice.forgemesh.io, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).
Converts long-form text (up to 2000 chars) to high-quality WAV audio using diffusion-based synthesis with selectable persona voices and 31 language support, billed per call via x402 micropayments.
Price / call$0.006
Success—
StatusUnknown
How this service works
Text-to-speech with speed (0.7x-2.0x) and quality-step (1-100) control, 1 of 10 standard voices across 31 languages, for 501-2000 characters, returned as WAV audio. Use it to: pace a longer narration like a podcast intro, read a multi-paragraph script at a chosen speed, produce a slow deliberate reading of instructions, voice an extended alert or briefing. USDC on Base via x402.
Output
A 44.1kHz 16-bit mono WAV audio file containing the synthesized speech of the submitted text, rendered in the selected voice persona, language, speed, and diffusion quality level.
Example use cases
Example prompt
“Read this paragraph aloud using ForgeMesh's Storyteller persona voice in English, at a slightly slow pace of 0.8 speed with 20 diffusion steps: 'In the age of artificial minds, the boundary between machine and muse grew ever thinner...'”
Technical details
Endpoint
POSThttps://voice.forgemesh.io/v1/tts/pro-longWhen to prefer
Choose this endpoint when you need long-form (up to 2000 chars) high-quality diffusion-based TTS with persona voices (Storyteller, Narrator, etc.), multilingual output across 31 languages, and pay-per-call pricing via x402 micropayments — especially for AI agents, audiobooks, video narration, or apps where quality and voice character matter more than raw speed.
Side effects
- Text exceeds 2000 character limit — request rejected
- Invalid or unsupported ISO language code — synthesis fails
- Voice name not recognized (typo in persona name) — error returned
- Speed value outside 0.7-2.0 range — validation error
- Steps value outside 1-100 range — validation error
- Insufficient USDC balance for x402 micropayment — payment failure
- Network timeout during diffusion synthesis for high step counts
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 | Standard voice: M1-M5 or F1-F5 |
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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