Send an audio or video URL and get back the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. Flat $0.09 per request, whatever the file — no per-MB component. Sources up to 3 MB, measured from the source's own content-length rather than anything the caller declares. audio/* and application/ogg; video/* is experimental and unproven. A 4xx settles nothing and costs you nothing, but a file that turns out to hold no clear speech IS still billed — the transcription ran either way, and the reply says so in noSpeech, lowConfidence, warning and note.
Pay from $0.09 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
listed 2026-07-28 · no on-chain settlement recorded yet
ASSESSMENT
updated 5h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 662ms
- avg response
- 662ms
- total checks
- 1
compliance A (13/14): declares the current x402 version (2)
13 of 14 x402 conformance checks pass; failing: declares the current x402 version (2). Full checklist below.
price $0.09 (p77 in AI)
- price (min)
- $0.09
- category percentile (min)
- p77 in AI
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- 137d
- registrar
- -
- hosting
- custom
- domain created
- 2026-03-13
Identity facts, not a risk score.
traction $0 30d · 0 buyers
- volume 30d
- $0
- buyers 30d
- 0
- settlements 30d
- 0
- first settlement
- ---
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- eip155:8453
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- $0
- max settlement 30d
- $0
- settled via
- -
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedTranscribes audio or video files into text, subtitles, and a cut list marking dead air.
- category
- audio-transcription
- in
- body
- auth
- none
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| POST | /transcribe | Transcribe an audio or video URL. Returns the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. One flat price, $0.0900 per request, whatever the file. Sources up to 3 MB. A file that turns out to hold no clear speech is still billed — the transcription ran. | $0.09 | Base | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to POST /transcribe returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i -X POST 'https://transcribe.soboljem.cz/transcribe'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xA0c79739Bc6214dA2a33978d5B9A86f42fd230bD",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://transcribe.soboljem.cz/transcribe",
"description": "Transcribe an audio or video URL. Returns the transcript, ready-made WebVTT subtitles, and an editor's cut list marking every stretch of dead air and how much shorter the result would be. One flat price, $0.0900 per request, whatever the file. Sources up to 3 MB. A file that turns out to hold no clear speech is still billed — the transcription ran.",
"outputSchema": {
"input": {
"type": "http",
"method": "POST",
"bodyType": "json",
"bodyFields": {
"url": {
"type": "string",
"required": true,
"description": "https URL of an audio or video file, up to 3 MB (measured from the source's content-length, not declared by you)"
},
"language": {
"type": "string",
"required": false,
"description": "optional ISO hint such as \"en\" or \"cs\"; omit to auto-detect"
}
},
"discoverable": true
},
"output": {
"type": "object",
"properties": {
"vtt": {
"type": "string",
"description": "WebVTT subtitles, ready for a timeline"
},
"cuts": {
"type": "array",
"items": {
"type": "object",
"properties": {
"to": {
"type": "number"
},
"from": {
"type": "number"
},
"reason": {
"type": "string"
},
"seconds": {
"type": "number"
}
}
},
"description": "stretches of dead air worth removing"
},
"text": {
"type": "string",
"description": "the full transcript"
},
"keeps": {
"type": "array",
"description": "the spans to keep, as [start, end] pairs"
},
"stats": {
"type": "object",
"properties": {
"sourceSeconds": {
"type": "number"
},
"speechSeconds": {
"type": "number"
},
"deadAirSeconds": {
"type": "number"
},
"wouldSavePercent": {
"type": "number"
}
}
},
"language": {
"type": "string",
"description": "detected language"
},
"segments": {
"type": "array",
"items": {
"type": "object",
"properties": {
"end": {
"type": "number"
},
"text": {
"type": "string"
},
"start": {
"type": "number"
}
}
},
"description": "speech spans"
},
"wordCount": {
"type": "number"
}
}
}
},
"maxAmountRequired": "90000",
"maxTimeoutSeconds": 300
}
],
"x402Version": 1
}
] OVER TIME
All charts share the 30d window selected here. Every series is also served as JSON at /api/v1/services/transcribe-audio-to-transcript-subtitles-and-a-cut-list/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
COMPLIANCE
13/14 checks pass · grade A · failing: declares the current x402 version (2)- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) · click to expand
EMBED THIS BADGE
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