Blackwood State Speech to Text
Use when you need speech to text transcription or translation of an audio file at a public URL. Do not use for audio over 10 MB or speaker labels. Returns JSON with a Whisper transcription of an audio file: text, timed segments and language, or an English translation for 0.005 USDC per megabyte, up to 0.05 USDC per call (clients without upto pay the cap). Asynchronous: the paid call returns a jobId and a free pollUrl; typical job time 20000 ms (p95). Category: Media.
MediaLiveeip155:8453Exactvia cdp
Speech to textTranscriptionTranslationMedia
Calls · 30d
6
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far.
$0.20
Verified settled volume
4 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
7
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-26 13:41Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xe9949cA82543031952eB55EB045f80A94C728fFcThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0xe994…28fFc. The signed payment is good for 1 minute.
- Paid to
- 0xe994…28fFc
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 50000 smallest units
0.05USDC≈ $0.05 USD
on Base · upto scheme
Pay 0.05 USDC on Base to 0xe994…28fFc. The signed payment is good for 1 minute.
- Paid to
- 0xe994…28fFc
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xe9949cA82543031952eB55EB045f80A94C728fFc",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"facilitatorAddress": "0x8F5cB67B49555E614892b7233CFdDEBFB746E531",
"assetTransferMethod": "permit2"
},
"payTo": "0xe9949cA82543031952eB55EB045f80A94C728fFc",
"amount": "50000",
"scheme": "upto",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://upload.wikimedia.org/wikipedia/commons/b/bb/Neil_Armstrong_small_step.wav"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"jobId": "job_00000000000000000000000000000000",
"status": "queued",
"pollUrl": "https://gateway.example/v1/speech-to-text/jobs/job_00000000000000000000000000000000",
"expiresAt": "2026-01-31T00:00:00.000Z"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"format": "uri",
"maxLength": 2048,
"description": "Public http(s) URL of the audio file, e.g. https://example.com/talk.mp3 (mp3, wav, ogg, m4a, webm; up to 10 MB)"
},
"task": {
"enum": [
"transcribe",
"translate"
],
"type": "string",
"description": "transcribe keeps the spoken language; translate returns English (transcribe when omitted)"
},
"language": {
"type": "string",
"pattern": "^[a-z]{2}$",
"description": "ISO 639-1 code of the spoken language, e.g. en or pt (detected when omitted)"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"jobId",
"pollUrl",
"expiresAt",
"status"
],
"properties": {
"next": {
"type": "object",
"required": [
"service",
"tool",
"method",
"url",
"useWhen",
"sample"
],
"properties": {
"url": {
"type": "string",
"description": "Paid route of the next call"
},
"tool": {
"type": "string",
"description": "MCP tool name of the same call"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"sample": {
"type": "string",
"description": "Free fixed sample of the whole family"
},
"service": {
"type": "string",
"description": "Service id of the suggested next paid call"
},
"useWhen": {
"type": "string",
"description": "When the next call is the right one"
}
},
"description": "Suggested next paid call in the same family (call it in a loop when the task continues)",
"additionalProperties": false
},
"jobId": {
"type": "string",
"maxLength": 100,
"minLength": 1
},
"status": {
"type": "string",
"const": "queued"
},
"pollUrl": {
"type": "string",
"format": "uri"
},
"expiresAt": {
"type": "string",
"description": "ISO 8601: depois disso o resultado deixa de existir"
}
},
"additionalProperties": false
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 13:41Z
- Last indexed by Roundhouse
- 2026-10-26 22:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-17 08:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 200
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Blackwood State Speech to Text and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Blackwood%20State%20Speech%20to%20Text' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402-gateway.blackwoodstate8.workers.dev/v1/speech-to-text, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.