Transcribe · audio to transcript, subtitles and a cut list

payment-readyonline

payment-ready until 2026-11-03

Compare: all transcription APIs

transcribe.soboljem.cz ↗

Call it x402 v2

x402 v2

Base URL: https://transcribe.soboljem.cz
Payment: x402 v2, header channel

$ curl -i -X POST 'https://transcribe.soboljem.cz/transcribe'

An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.

Endpoints 1 paid route on transcribe.soboljem.cz

POST/transcribeBase$0.05since 07-28

Prices as captured in the 402 response: $0.05.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
Method	Path	Description	Price	Network	Asset	402 channel	Captured
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, $0.0500 per request, whatever the file. Sources up to 800 KB. A file that turns out to hold no clear speech is still billed · the transcription ran.	$0.05	Base	USDC	header	since 07-28

Payment evidence

402 payload captured at 2026-08-18 21:33:02 UTC. Check evidence JSON · Measurement methodology.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xA0c79739Bc6214dA2a33978d5B9A86f42fd230bD",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://transcribe.soboljem.cz/transcribe",
    "mimeType": "application/json",
    "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, $0.0500 per request, whatever the file. Sources up to 800 KB. A file that turns out to hold no clear speech is still billed — the transcription ran."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "url": {
              "type": "string",
              "required": false,
              "description": "https URL of an audio or video file, up to 800 KB (measured from the source's content-length, not declared by you). Send this OR audio."
            },
            "audio": {
              "type": "string",
              "required": false,
              "description": "the audio itself, base64 encoded (a data: URI is fine), up to 800 KB decoded. Use this if you are holding the file — it needs no hosting, no account and no second request. Send this OR url."
            },
            "language": {
              "type": "string",
              "required": false,
              "description": "optional ISO hint such as \"en\" or \"cs\"; omit to auto-detect"
            }
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "vtt": "WEBVTT\n\n00:00.000 --> 00:02.400\nso anyway, that is the whole idea",
            "cuts": [
              {
                "to": 5.1,
                "from": 2.4,
                "reason": "silence",
                "seconds": 2.7
              }
            ],
            "text": "so anyway, that is the whole idea",
            "stats": {
              "sourceSeconds": 12,
              "speechSeconds": 9.3,
              "wouldSavePercent": 22.5
            },
            "language": "en",
            "wordCount": 8
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "properties": {}
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

78/100 Solid

                           │         │ ·······│···
0                          55        75       93

                │     │ ···│··
0               55    75   93

#144 of 186 in AI. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability: 100% uptime 30d
Compliance: A 14/14 checks pass
Price: $0.05 p76 in AI
Risk: clean no risk flag
Traction: $0.00 30d 0 buyers

14/14 compliance checks

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

402 terms unchanged since 2026-08-18. Last up 2026-10-27.

── Site signals

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

How the score works

What the score read on this service: status online, 100% uptime 30d, 3620ms response p95, x402 compliance 14 of 14, $0.05 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

It is a score inside AI, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 186 listings, this one among them: the same 186 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Traction is a conservative undercount; first settlement seen 2026-07-27.

All measured facts

What it does

Send audio as base64 bytes in the request body, or as an https 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 $0.02 per request, whatever the file · no per-MB component. Sources up to 800 KB: base64 is measured decoded, a URL is measured from the source's own content-length rather than anything the caller declares. No account, no API key and no upload step · if you are holding the audio, you can buy. 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.

Transcribe · audio to transcript, subtitles and a cut list is a listed x402 AI API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.

Assessment computed at 2026-10-26 21:04:44 UTC. Latest service check observed at 2026-10-27 00:48:03 UTC. Service data JSON · Measurement methodology.

Page rendered at 2026-10-27 00:55:36 UTC. This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: 2026-10-27 00:48:03 UTC. Latest price capture: 2026-08-18 21:17:02 UTC. Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.

Assessment computed at 2026-10-26 21:04:44 UTC. Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.

Observed daily coverage: 2026-09-28 to 2026-10-27 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: 2026-09-25 01:37:01 UTC. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.

Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.

x402 List home · Services · AI

uptime · latest daily rollup: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 99.9%
response p95: 3620ms
avg response: 1308ms
total checks: 2,736

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

price (min): $0.05
category percentile (min): p76 in AI
endpoints / prices: 1 / 1
model: flat
stability: 0%

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: 223d
registrar: WEDOS Internet, a.s.
hosting: custom
domain created: 2026-03-13

Identity facts, not a risk score.

assessment volume 30d: $0.00
exact assessment volume 30d (USD): 0
assessment recorded at (UTC): 2026-10-26T21:04:44.201Z
buyers 30d: 0
settlements 30d: 0
measured since: 2026-07-27 (start of our harvest window)
last settlement: 2026-09-25
top buyer share: -
top 3 buyers share: -
concentrated volume: no
trend 7d vs 30d: -
networks: eip155:8453
volume all-time: $0.16
settlements all-time: 13
median settlement 30d: -
max settlement 30d: -

Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.

member since: 2026-07-28

Recent checks

Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)	Status	HTTP	Response	Endpoints
2026-10-27 00:48:03 UTC	Online	402	1172ms	1
2026-10-27 00:32:03 UTC	Online	402	963ms	1
2026-10-27 00:16:02 UTC	Online	402	1024ms	1
2026-10-27 00:00:02 UTC	Online	402	861ms	1
2026-10-26 23:44:02 UTC	Online	402	1085ms	1
2026-10-26 23:27:02 UTC	Online	402	1499ms	1
2026-10-26 23:11:03 UTC	Online	402	1357ms	1
2026-10-26 22:55:02 UTC	Online	402	1380ms	1
2026-10-26 22:39:02 UTC	Online	402	730ms	1
2026-10-26 22:23:02 UTC	Online	402	1453ms	1
2026-10-26 22:07:02 UTC	Online	402	738ms	1
2026-10-26 21:51:03 UTC	Online	402	1146ms	1
2026-10-26 21:35:02 UTC	Online	402	921ms	1
2026-10-26 21:19:02 UTC	Online	402	1254ms	1
2026-10-26 21:03:03 UTC	Online	402	1178ms	1
2026-10-26 20:47:02 UTC	Online	402	1147ms	1
2026-10-26 20:31:01 UTC	Online	402	1054ms	1
2026-10-26 20:15:01 UTC	Online	402	885ms	1

Changes0 in 30d

No changes recorded in the last 30 days.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.00

                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
       ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  
    $0

volume no data in the payload

Distinct buyers per dayDistinct buyers per day

        ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·

Uptime 100% on all 29 completed days

       ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██

       09-28                                     10-12                                   10-27*

Volume 30d: $0.00
Uptime: 100% on all 29 completed days

Daily on-chain settlement volume in US dollars, 2026-09-28 to 2026-10-27; 30 days have no data in the payload; distinct buyers per day

Day    Volume             USD  Buyers
09-28  · no data, 30 days to 10-27*

More charts

Response time daily average, ms min 861ms, avg 1286ms, max 1622ms

       ▇▇ ▆▆ ▆▆ ▇▇ ██ ██ ▆▆ ▆▆ ▆▆ ▆▆ ▇▇ ▇▇ ██ ██ ██ ▇▇ ██ ▆▆ ▆▆ ▅▅ ▆▆ ▆▆ ▆▆ ▆▆ ▅▅ ▆▆ ▇▇ ▆▆ ▅▅ ▄▄

09-28 to 10-27* UTC

      ▇▆▆▇██▆▆▆▆▇▇███▇█▆▆▅▆▆▆▆▅▆▇▆▅▄

      09-28         10-12     10-27*

Scores over time

x402 compliance low 14/14, high 14/14

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

09-28 to 10-27* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      09-28         10-12     10-27*

Price percentile in AI own low to high; exact values below

       ▄▄ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▄▄ ▄▄ ▁▁ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇ ▇▇

09-28 to 10-27* UTC

      ▄▁▁▁▁▁▁▄▄▁▄▄▄▄▄▄▇▇▇▇▇▇▇▇▇▇▇▇▇

      09-28         10-12     10-27*

Site signals present (of 6) own low to high; exact values below

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

09-28 to 10-27* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      09-28         10-12     10-27*

       09-28                                     10-12                                   10-27*

      09-28         10-12     10-27*

Scores: one day per column, 09-28 to 10-27*, on the columns of Response time. Uptime held 100% every day in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.

Each series spans only the dates it has data for. 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.

Values

* today so far, partial (UTC).

The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.

Daily snapshot total, no volume data in the last 30d. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.

Daily address snapshots: 2026-09-28 to 2026-10-27 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.

Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.

Assessment history last recorded at 2026-10-26 21:04:44 UTC. Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-28 to 2026-10-27: address settlement volume in USD, distinct buyer and settlement counts, uptime percent, average response milliseconds, compliance passed/total, price percentile 0-100, site signals out of 6; UTC dates
Day	Volume	Buyers	Settlements	Uptime	Response	Compliance	Price percentile	Site signals
2026-09-28	no data	no data	no data	100%	1338.89ms	14/14	p75	3/6
2026-09-29	no data	no data	no data	100%	1162.54ms	14/14	p74	3/6
2026-09-30	no data	no data	no data	100%	1139.23ms	14/14	p74	3/6
2026-10-01	no data	no data	no data	100%	1366.50ms	14/14	p74	3/6
2026-10-02	no data	no data	no data	100%	1550.52ms	14/14	p74	3/6
2026-10-03	no data	no data	no data	100%	1543.38ms	14/14	p74	3/6
2026-10-04	no data	no data	no data	100%	1294.03ms	14/14	p74	3/6
2026-10-05	no data	no data	no data	100%	1130.65ms	14/14	p75	3/6
2026-10-06	no data	no data	no data	100%	1249.68ms	14/14	p75	3/6
2026-10-07	no data	no data	no data	100%	1248.70ms	14/14	p74	3/6
2026-10-08	no data	no data	no data	100%	1333.49ms	14/14	p75	3/6
2026-10-09	no data	no data	no data	100%	1505.14ms	14/14	p75	3/6
2026-10-10	no data	no data	no data	100%	1586.26ms	14/14	p75	3/6
2026-10-11	no data	no data	no data	100%	1622.46ms	14/14	p75	3/6
2026-10-12	no data	no data	no data	100%	1545.29ms	14/14	p75	3/6
2026-10-13	no data	no data	no data	100%	1383.77ms	14/14	p75	3/6
2026-10-14	no data	no data	no data	100%	1612.96ms	14/14	p76	3/6
2026-10-15	no data	no data	no data	100%	1270.89ms	14/14	p76	3/6
2026-10-16	no data	no data	no data	100%	1190.83ms	14/14	p76	3/6
2026-10-17	no data	no data	no data	100%	1016.40ms	14/14	p76	3/6
2026-10-18	no data	no data	no data	100%	1158.49ms	14/14	p76	3/6
2026-10-19	no data	no data	no data	100%	1207.54ms	14/14	p76	3/6
2026-10-20	no data	no data	no data	100%	1228.33ms	14/14	p76	3/6
2026-10-21	no data	no data	no data	100%	1314.57ms	14/14	p76	3/6
2026-10-22	no data	no data	no data	100%	1044.58ms	14/14	p76	3/6
2026-10-23	no data	no data	no data	100%	1259.18ms	14/14	p76	3/6
2026-10-24	no data	no data	no data	100%	1340.67ms	14/14	p76	3/6
2026-10-25	no data	no data	no data	100%	1120.00ms	14/14	p76	3/6
2026-10-26	no data	no data	no data	100%	951.83ms	14/14	p76	3/6
2026-10-27*	no data	no data	no data	100%	861.00ms	no data	no data	no data

Alternatives in AI

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x402engine strong 94/100 100% up 30d $38.87 30d

Agent402.tools strong 94/100 99.8% up 30d $272.25 30d

AX1 Console solid 93/100 99.7% up 30d $9.5k 30d

5 of 185 other ranked services in AI, ordered by the same measured score.

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Delisting

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