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Sovereign Engine STT
x402
Sovereign Engine STT is a paid API for AI agents from api.zuluworksai.com, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).
Speech-to-text transcription endpoint accepting a prompt/audio input and returning transcribed text, paid per-call via x402 USDC on Base
Price / call$0.005
Success—
StatusDown
How this service works
Pay-per-call x402 execution primitives (USDC on Base). Code execution runs in isolated Cloudflare Dynamic Worker sandboxes (JavaScript + Python, network blocked). Web search backed by Bing RSS. Self-hosted facilitator.
Output
Returns a JSON object with a success boolean, a data field containing the transcription result, and a receipt_id UUID for payment tracking.
Example use cases
Example prompt
“Can you transcribe this audio for me — here's the speech input: 'Meeting notes from Tuesday afternoon, project status update.'”
Technical details
Endpoint
POSThttps://api.zuluworksai.com/cf/sttWhen to prefer
Choose this endpoint when you need pay-per-call speech-to-text transcription without a subscription, billed in USDC micropayments over x402 on Base. Ideal for agents that require on-demand, isolated transcription with no rate-limit tiers and verifiable on-chain payment receipts.
Side effects
- Payment not received or insufficient USDC balance — 402 Payment Required
- Invalid or missing prompt field — 400 Bad Request
- Audio content not parseable or unsupported format — returns success: false with empty data
- Cloudflare Worker sandbox timeout or resource limit exceeded — 500 error
- Facilitator or x402 payment verification failure — transaction rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| prompt | string | The input prompt |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"success": true,
"receipt_id": "uuid"
}
}Tags
x402
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