# the402.ai Audio Transcription Purchase

> the402.ai Audio Transcription Purchase is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.053/call, status down (last checked 2026-09-15).

Purchases an audio transcription service job on the402.ai marketplace, converting audio content to text via a paid x402 micropayment

## Facts

- Endpoint: POST https://api.the402.ai/v1/services/svc_5130a3a02e9f456a/purchase
- Price: $0.053/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-the402-ai-f63f5792
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BN-hIfolvSN8pZcz1L4ub

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-the402-ai-f63f5792 -d '<json body>'
```

Example prompt: Can you transcribe this audio recording for me? Submit it to the402.ai transcription service — here's the file URL: https://example.com/my-interview.mp3

## When to prefer this

Choose this endpoint when you need to convert audio content to text and are operating in an agentic context that supports x402 micropayments. Prefer this over generic transcription APIs when you are already integrated with the402.ai marketplace ecosystem or when you need a pay-per-use model at $0.053 per call with no subscription required.

## Known failure modes

- Insufficient USDC balance or payment failure — x402 payment not accepted
- Invalid or inaccessible audio URL — returns error indicating file cannot be fetched
- Unsupported audio format — service rejects file type
- Job submission timeout — service endpoint unresponsive
- Missing required parameters in POST body — returns 400 bad request

## How this service works

Purchase: Audio Transcription

## Output

A job ID or confirmation that the audio transcription purchase was submitted, along with the resulting transcript text or a reference to retrieve it once the job completes.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "job_id": {
   "type": "string"
  },
  "status": {
   "type": "string"
  },
  "thread_id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-the402-ai-f63f5792/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)