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FetchHarbor Audio Format Converter
x402
FetchHarbor Audio Format Converter is a paid API for AI agents from fetchharbor.benlab.download, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-14).
Converts base64-encoded audio to WAV, MP3, Opus, or FLAC format using server-side FFmpeg in an isolated worker, returning base64 JSON with no media retained.
Price / call$0.015
Success—
StatusUnknown
How this service works
Convert bounded audio to WAV, MP3, Opus, or FLAC with fixed server-side FFmpeg arguments in an isolated worker. Returns base64 JSON and retains no media.
Output
A JSON object containing the converted audio encoded as a base64 string in the requested format (WAV, MP3, Opus, or FLAC). No media is retained server-side after the response is returned.
Example use cases
Podcast episode format normalization
“I have a base64-encoded WAV recording of my podcast episode — can you convert it to MP3 so it's ready for upload to my hosting platform?”
Lossless archive conversion
“Take this base64 audio and convert it to FLAC format so I have a lossless archive copy — no need to store it anywhere, just send me back the base64 result.”
Opus compression for web streaming
“I need this audio converted to Opus format for my web app — here's the base64-encoded source file, please transcode it and return the Opus base64 output.”
Technical details
Endpoint
POSThttps://fetchharbor.benlab.download/audio/convertWhen to prefer
Choose this endpoint when you need privacy-safe, stateless audio format conversion without any server-side media retention. Ideal for agents that need to transcode audio between WAV, MP3, Opus, and FLAC using fixed, deterministic FFmpeg arguments in an isolated environment. Prefer this over general-purpose transcoding services when privacy and no-storage guarantees matter, or when operating within an x402 micropayment workflow.
Side effects
- Audio file exceeds operator-defined size limit — returns an error indicating decoded size is too large
- Unsupported or malformed base64 input — FFmpeg may fail to decode or process the audio
- Invalid format enum value — request rejected with validation error
- Corrupt or unrecognizable audio codec in the source file — FFmpeg transcoding error
- Worker timeout if audio processing takes too long for large files
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| format | string | |
| language | — | |
| audio_base64 | string | Base64-encoded audio; decoded size is operator limited. |
Tags
x402
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