x402 Voice-to-Text
Speech-to-text transcription for voice messages and audio clips. Upload a wav, mp3, m4a, ogg or webm file as multipart form-data and get the spoken text back as JSON. Runs a dedicated ASR model, so short noisy voice notes transcribe accurately. Accepts clips up to 10 minutes / 25 MB, billed per 10-second block. Use it to turn voice notes, call recordings, podcast clips or voicemail into text an agent can read.
InferenceLiveeip155:8453Exactvia cdp
Speech-to-textTranscriptionAudioAsrVoice
Calls · 30d
15
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$3.53
Verified settled volume
399 settlements proven x402 by their on-chain EIP-3009 marker.
$0.015
Listed price
As published in the catalog. Always read the live 402 before paying.
15
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-01 02:51Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2The 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"billed": "1 x 10s voice message @ $0.0150",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
"amount": "15000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"catalog": {
"docs": "https://cyberwarex.com/llms.txt",
"services": "https://cyberwarex.com/.well-known/x402"
},
"resource": {
"url": "https://voice.cyberwarex.com/transcribe",
"tags": [
"speech-to-text",
"transcription",
"audio",
"asr",
"voice"
],
"iconUrl": "https://cyberwarex.com/assets/icon.png",
"mimeType": "application/json",
"description": "Speech-to-text transcription for voice messages and audio clips. Upload a wav, mp3, m4a, ogg or webm file as multipart form-data and get the spoken text back as JSON. Runs a dedicated ASR model, so short noisy voice notes transcribe accurately. Accepts clips up to 10 minutes / 25 MB, billed per 10-second block. Use it to turn voice notes, call recordings, podcast clips or voicemail into text an agent can read.",
"serviceName": "x402 Voice-to-Text"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"file": "<multipart audio file: voice-note.mp3>"
},
"type": "http",
"method": "POST",
"bodyType": "form-data"
},
"output": {
"type": "json",
"example": {
"text": "Hey, quick voice note about the Q3 roadmap. Can we move the launch review to Thursday?"
}
}
},
"schema": {
"type": "object",
"$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": [
"file"
],
"properties": {
"file": {
"type": "string",
"format": "binary",
"description": "Audio file to transcribe (wav, mp3, m4a, ogg, webm, flac). Max 10 minutes and 25 MB."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"note": {
"type": "string",
"description": "Set to 'no speech detected' when the clip is silent."
},
"text": {
"type": "string",
"description": "Transcribed speech from the uploaded audio."
},
"charged": {
"type": "boolean",
"description": "False when silence was detected and no payment was taken."
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.015USDC≈ $0.015 USD
on Base · exact scheme
Pay 0.015 USDC on Base to 0x058D…921B2. The signed payment is good for 5 minutes.
- Paid to
- 0x058D…921B2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 15000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
"amount": "15000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"file": "<multipart audio file: voice-note.mp3>"
},
"type": "http",
"method": "POST",
"bodyType": "form-data"
},
"output": {
"type": "json",
"example": {
"text": "Hey, quick voice note about the Q3 roadmap. Can we move the launch review to Thursday?"
}
}
},
"schema": {
"type": "object",
"$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": [
"file"
],
"properties": {
"file": {
"type": "string",
"format": "binary",
"description": "Audio file to transcribe (wav, mp3, m4a, ogg, webm, flac). Max 10 minutes and 25 MB."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"note": {
"type": "string",
"description": "Set to 'no speech detected' when the clip is silent."
},
"text": {
"type": "string",
"description": "Transcribed speech from the uploaded audio."
},
"charged": {
"type": "boolean",
"description": "False when silence was detected and no payment was taken."
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-01 02:51Z
- Last indexed by Roundhouse
- 2026-09-04 19:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-01 14:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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. 10 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 x402 Voice-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=x402%20Voice-to-Text' 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://voice.cyberwarex.com/transcribe, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://app.roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://app.roundhouseai.io/skill.md first — it is the whole procedure.