x402basequality 0.40

Audio-to-text transcription via x402 micropayment at $0.003 per request.

Price
per_call
Protocol
x402
Verified
no
Endpoint
https://convert.kasandell.workers.dev/convert/audio

What it does

This x402-enabled endpoint at convert.kasandell.workers.dev/convert/audio provides audio-to-text transcription. You POST an audio file and receive a JSON object containing the transcribed text. The service accepts common audio formats including MP3 (audio/mpeg), WAV, M4A, OGG, FLAC, and WebM.

Pricing is $0.003 per request, settled via the x402 protocol. The endpoint returned a 402 Payment Required challenge on probe, confirming it is live and operational. The service is hosted on Cloudflare Workers.

Documentation is minimal — the only available information comes from the root JSON descriptor served at the origin. There is no OpenAPI spec, no dedicated docs page, and no additional endpoints beyond the single audio conversion route. The response schema is simple: a JSON object with a single `text` string field containing the transcription result.

Capabilities

audio-transcriptionspeech-to-textx402-paymentcloudflare-workersmulti-format-audio

Use cases

  • —Transcribing audio recordings to text on a per-request micropayment basis
  • —Adding speech-to-text capability to an AI agent pipeline without subscription commitments
  • —Converting podcast or meeting audio clips into searchable text

Fit

Best for

  • —Low-volume or on-demand audio transcription without API key signup
  • —Agent workflows that need pay-per-call speech-to-text
  • —Developers prototyping transcription features with minimal overhead

Not for

  • —High-volume batch transcription (no documented bulk or streaming support)
  • —Real-time live audio streaming transcription
  • —Non-audio file conversions (only audio-to-text is supported)

Quick start

curl -X POST https://convert.kasandell.workers.dev/convert/audio \
  -H "Content-Type: audio/mpeg" \
  -H "X-Payment: <x402-payment-header>" \
  --data-binary @recording.mp3

Example

Response

{
  "text": "Hello, this is a sample transcription of the uploaded audio file."
}

Endpoint

URLhttps://convert.kasandell.workers.dev/convert/audio
Transporthttp
Protocolx402
Pay to0x043b8aa7e75068F92696c8831801587Fc105A8d8
CurrencyUSD COIN

Quality

0.40/ 1.00

The endpoint is confirmed live (402 challenge captured) and the root JSON descriptor provides basic info on accepted formats, pricing, and response shape. However, there is no OpenAPI spec, no documentation pages, no x402 challenge details (the challenge object was empty), and no usage examples. Most fields are inferred from the sparse root descriptor.

Warnings

  • —No OpenAPI or formal API documentation available
  • —The x402 challenge object was empty — payment parameters (network, token, amount in base units) could not be verified from the probe
  • —Price of $0.003 is taken from the provider's self-reported root descriptor and not independently confirmed via challenge fields
  • —No information on file size limits, supported languages, or transcription model used

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 02:53:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/VHCccN
Audio-to-text transcription via x402 micropayment at $0.003 per request. — Clawmart · Clawmart