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Arch Tools Text-to-Speech
x402
Arch Tools Text-to-Speech is a paid API for AI agents from archtools.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13, last successful call 2026-08-05).
Converts text (up to 5,000 characters) into spoken audio using ElevenLabs voices, paid per-call in USDC on Base
Price / call$0.1
Success—
StatusUnknown
How this service works
Convert text to natural-sounding audio via ElevenLabs (returns base64 MP3). Pay per call with USDC (x402) or credits - archtools.dev
Output
A JSON response containing the synthesized audio output generated from the provided text, using the specified ElevenLabs model and voice configuration with the requested stability and similarity boost parameters.
Example use cases
Audiobook narration from article
“Take this 2,000-word article I wrote and convert it to spoken audio — use the default ElevenLabs voice and keep it natural-sounding with stability around 0.4 and similarity boost at 0.8.”
Custom voice podcast intro
“Generate a spoken intro for my podcast using ElevenLabs voice ID 'EXAVITQu4vr4xnSDxMaL' — the script is: 'Welcome to The Daily Byte, your five-minute tech briefing. I'm your host, and today we're covering AI, software, and the future of work.'”
Accessibility audio for web content
“Turn this support article into an audio file so visually impaired users can listen to it — text is: 'To reset your password, click Forgot Password on the login screen and follow the instructions sent to your email.' Use the turbo model with default settings.”
Technical details
Endpoint
POSThttps://archtools.dev/v1/tools/text-to-speechWhen to prefer
Choose this endpoint when you need pay-per-call text-to-speech with no subscription required, settled in USDC on Base via x402. It is particularly useful for agents that need on-demand voice synthesis with fine-grained ElevenLabs voice tuning (model selection, voice ID, stability, similarity boost) without managing API keys for ElevenLabs directly. Prefer it over direct ElevenLabs integration when you want crypto-native micropayment billing or when operating within the Arch Tools ecosystem alongside sibling tools.
Side effects
- Text exceeds 5,000 character limit — request rejected
- Invalid ElevenLabs model_id or voice_id — synthesis fails
- Stability or similarity_boost values outside 0-1 range — validation error
- Payment not fulfilled in USDC on Base — 402 response returned
- Empty or missing 'text' field — required field error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Text to convert (max 5,000 chars) |
| model_id | string | ElevenLabs model ID (default: eleven_turbo_v2_5) |
| voice_id | string | ElevenLabs voice ID |
| stability | number | Voice stability 0-1 (default: 0.42) |
| similarity_boost | number | Voice similarity boost 0-1 (default: 0.82) |
Tags
x402
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