# Nexari Pay-Per-Minute Audio Transcription (upto scheme)

> Nexari Pay-Per-Minute Audio Transcription (upto scheme) is a paid API for AI agents from x402.nexari.cloud, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-02).

Transcribes audio files with per-minute billing via x402 upto scheme (0.01 USD/min, max 0.50 USD, up to 50 minutes), processed in Germany.

## Facts

- Endpoint: POST https://x402.nexari.cloud/transcribe/upto?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexari-pay-per-minute-audio-transcription-upto-scheme-8bc9d595
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rUaoSTsHRs0uWFalWczb0

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 nexari-pay-per-minute-audio-transcription-upto-scheme-8bc9d595 -d '<json body>'
```

Example prompt: Please transcribe this 45-minute German interview recording for me — here's the public URL: https://example.com/interview.m4a — the file is called interview.m4a and the language is German.

## When to prefer this

Choose this endpoint when you need to transcribe audio files longer than 2 or 10 minutes (up to 50 minutes) and want cost-efficient pay-per-minute billing rather than a flat fee. Ideal for long meetings, podcasts, or interviews where the exact duration varies. Prefer this over the fixed-price sibling endpoints when content is consistently over 10 minutes. Best for German-language content or when auto-detection of language is needed, with the added benefit of GDPR-compliant processing in Germany.

## Known failure modes

- Audio URL is not publicly accessible or returns a non-200 response
- Audio duration exceeds 50 minutes maximum limit
- Unsupported audio format or corrupted file
- Invalid or missing accept_terms_hash causing terms acceptance failure
- Payment via x402 upto scheme fails or is rejected
- Base64-encoded audio is malformed or too large
- Language code not supported by the transcription engine

## How this service works

Experiment: Transkription pro Minute abgerechnet (0,01 USD/Min, max 0,50 USD, bis 50 Min) über das upto-Schema. Pay-per-minute transcription via the x402 upto scheme.

## Output

Returns a text transcript of the audio content, billed at 0.01 USD per minute of audio up to a maximum of 0.50 USD for up to 50 minutes of audio, processed in Germany.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "filename": {
   "type": "string",
   "description": "Dateiname mit Endung, z. B. memo.m4a"
  },
  "language": {
   "type": "string",
   "description": "de (Standard), en, auto ..."
  },
  "audio_url": {
   "type": "string",
   "description": "HTTPS-URL der Audiodatei / public URL of the audio file"
  },
  "audio_base64": {
   "type": "string",
   "description": "Audio als Base64 / audio as base64"
  },
  "num_speakers": {
   "type": "integer",
   "description": "Nur /speakers: bekannte Sprecherzahl (1-10), verbessert die Trennung"
  },
  "business_name": {
   "type": "string",
   "description": "Unternehmen, für das gehandelt wird (nur B2B)"
  },
  "privacy_contact": {
   "type": "string",
   "description": "E-Mail für Datenschutz-Meldungen (Art. 33 DSGVO)"
  },
  "accept_terms_hash": {
   "type": "string",
   "description": "SHA-256 der AGB aus /legal/terms.json"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexari-pay-per-minute-audio-transcription-upto-scheme-8bc9d595/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.nexari.cloud](https://www.zero.xyz/host/x402.nexari.cloud/llms.txt)