# MolCloud Audio Transcription

> MolCloud Audio Transcription is a paid API for AI agents from api.molcloud.net, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-19).

Transcribes speech from an audio file (URL or base64) to text, returning the transcript and optional segments via pay-per-request USDC micropayment.

## Facts

- Endpoint: POST https://api.molcloud.net/api/ai/transcribe?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/molcloud-audio-transcription-3c7dcb96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gtBJ4GpO2hcQkBETDCVHV

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 molcloud-audio-transcription-3c7dcb96 -d '<json body>'
```

Example prompt: Can you transcribe this MP3 interview recording for me? Here's the public URL: https://example.com/interview.mp3 — the audio is in English.

## When to prefer this

Choose this endpoint when you need quick, pay-per-request speech-to-text without a subscription, especially in autonomous agent workflows that settle micropayments in USDC on Base via x402. It is well-suited for agents that process arbitrary audio URLs on demand and need a simple transcript+segments output without managing a dedicated ASR service account.

## Known failure modes

- Invalid or inaccessible audio URL returns an error status
- Unsupported audio format (e.g. FLAC) may fail or return empty transcript
- Very long audio files may time out or exceed processing limits
- Incorrect language hint may degrade transcription accuracy
- Malformed base64 payload causes decoding error
- Network fetch of audio URL fails if the file is behind authentication or a CDN block

## How this service works

40 pay-per-request AI, search, headless browser, crypto alpha & memory APIs for autonomous agents settling in USDC on Base via x402 v2.

## Output

Returns a JSON object with a 'data' field containing 'text' (the full transcribed string) and 'segments' (an array of timed or segmented transcript chunks), plus a 'status' field ('success') and the endpoint path confirming which API was called.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "audioUrl": {
   "type": "string",
   "description": "Public URL of audio file (MP3, WAV, OGG, M4A)"
  },
  "language": {
   "type": "string",
   "description": "Optional ISO language hint (e.g. en)"
  },
  "audioBase64": {
   "type": "string",
   "description": "Optional base64-encoded audio payload"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "text": "Transcribed speech text...",
   "segments": []
  },
  "status": "success",
  "endpoint": "/api/ai/transcribe"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/molcloud-audio-transcription-3c7dcb96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.molcloud.net](https://www.zero.xyz/host/api.molcloud.net/llms.txt)