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ForgeMesh Text-to-Speech (Long-Form)
x402
ForgeMesh Text-to-Speech (Long-Form) is a paid API for AI agents from tts.forgemesh.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Converts up to 2000 characters of text into spoken audio (WAV/FLAC/OGG) across 31 languages using a selection of male and female voices, paid per-call via x402 micropayments with no API key required.
Price / call$0.003
Success—
StatusUnknown
How this service works
Paid text-to-speech via x402. WAV audio in 31 languages, OpenAI-compatible, no API keys.
Output
Returns an audio file (WAV by default, or FLAC/OGG if specified) containing the synthesized speech for the provided text, using the selected voice. The response is an OpenAI-compatible inline audio payload with the appropriate content-type header (audio/wav, audio/flac, or audio/ogg).
Example use cases
Multilingual product announcement narration
“I need to turn this product announcement into spoken audio using a professional male voice — use M3 and give me a WAV file: 'Introducing our new wireless headphones. Crystal-clear sound, 40-hour battery life, and a sleek foldable design.'”
Accessible reading for web article
“Convert this article excerpt into audio so visually impaired users can listen to it — use the F1 voice and return it as an OGG file: 'Climate scientists have confirmed that 2024 was the hottest year on record, surpassing the previous record set just a year earlier.'”
Voiceover for app onboarding flow
“Generate a friendly spoken greeting for my app's onboarding screen using the M2 voice in WAV format: 'Hi there! Let's get you set up. It only takes two minutes to create your account and start exploring.'”
Technical details
Endpoint
POSThttps://tts.forgemesh.io/v1/audio/speech-longWhen to prefer
Choose this endpoint when you need OpenAI-compatible TTS without managing API keys, want to pay per call via x402 USDC micropayments, need multilingual support across 31 languages, or want a choice of 10 distinct voices (5 male, 5 female). It is especially well-suited for agents that already handle x402 payment flows and need audio generation as a drop-in capability without account provisioning.
Side effects
- Payment failure: x402 micropayment not processed or insufficient USDC balance — request rejected before synthesis
- Input too long: text exceeds 2000 characters — validation error returned
- Invalid voice ID: value outside M1-M5/F1-F5 enum — bad request error
- Unsupported format: response_format not in wav/flac/ogg — ignored or error
- Service unavailability: ForgeMesh Voice backend timeout or downtime — 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | OpenAI-compatible text input to synthesize, max 2000 characters |
| model | string | Ignored — always uses ForgeMesh Voice |
| voice | string | Standard voice: M1-M5 or F1-F5 |
| response_format | string | Requested audio format |
Output
Schema · Response
{
"type": "json",
"example": {
"description": "OpenAI-compatible inline speech audio response",
"content_type": "audio/wav"
}
}Tags
x402
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