audio.halowerk.com
HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.
MediaLiveeip155:8453Exactvia cdp
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$11.51
Verified settled volume
2,677 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0080
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-13 11:45Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5EThe 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.
{
"docs": "https://audio.halowerk.com/llms.txt",
"name": "audio_loudness_normalise",
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "8000",
"scheme": "exact",
"network": "eip155:8453",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://audio.halowerk.com/pricing",
"resource": {
"url": "https://audio.halowerk.com/loudness-normalise",
"mimeType": "application/json",
"description": "Normalises to −14 LUFS by default, the level the streaming platforms converged on, with named presets for podcast, European and United States broadcast, or a free target. The correction runs in two passes: the first measures integrated loudness, true peak, loudness range and threshold, the second applies a constant correction derived from those figures."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"audio": {
"url": "https://example.com",
"content_base64": "Beispieltext."
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"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": [
"audio"
],
"properties": {
"audio": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL."
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The file inline, base64."
}
},
"description": "The recording. Either url or content_base64.",
"additionalProperties": false
},
"target": {
"enum": [
"streaming",
"podcast",
"broadcast_eu",
"broadcast_us",
"custom"
],
"type": "string",
"default": "streaming",
"description": "Named target. streaming is -14 LUFS."
},
"target_lufs": {
"type": "number",
"maximum": -5,
"minimum": -40,
"description": "Integrated loudness target, only with target=custom."
},
"true_peak_db": {
"type": "number",
"maximum": 0,
"minimum": -9,
"description": "True peak ceiling in dBTP, only with target=custom."
},
"output_format": {
"enum": [
"mp3",
"wav",
"flac",
"opus"
],
"type": "string",
"default": "mp3",
"description": "Format of the normalised file."
},
"loudness_range_lu": {
"type": "number",
"maximum": 30,
"minimum": 1,
"description": "Loudness range target, only with target=custom."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
},
"price_usdc": "0.008",
"description": "Normalises to −14 LUFS by default, the level the streaming platforms converged on, with named presets for podcast, European and United States broadcast, or a free target. The correction runs in two passes: the first measures integrated loudness, true peak, loudness range and threshold, the second applies a constant correction derived from those figures. The single-pass form of the same filter works its correction out as it plays and therefore rides the level during the opening seconds of a file — audible on every track, and the reason the measurement pass is not optional here. The measured values from both passes come back in full, including the loudness range, because a recording with a range above roughly 15 LU cannot be brought to a target without either compressing it or clipping the peaks, and which of the two happened is something the buyer has to be able to see. True peak is limited to the target ceiling so that a lossy encoder downstream does not push the signal into distortion — normalising to a sample peak instead of a true peak is the most common way a file that measured clean arrives clipped. If the recording already sits within half a decibel of the target, that is stated and the correction applied is near zero rather than being dressed up as work.",
"inputSchema": {
"type": "object",
"required": [
"audio"
],
"properties": {
"audio": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL."
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The file inline, base64."
}
},
"description": "The recording. Either url or content_base64.",
"additionalProperties": false
},
"target": {
"enum": [
"streaming",
"podcast",
"broadcast_eu",
"broadcast_us",
"custom"
],
"type": "string",
"default": "streaming",
"description": "Named target. streaming is -14 LUFS."
},
"target_lufs": {
"type": "number",
"maximum": -5,
"minimum": -40,
"description": "Integrated loudness target, only with target=custom."
},
"true_peak_db": {
"type": "number",
"maximum": 0,
"minimum": -9,
"description": "True peak ceiling in dBTP, only with target=custom."
},
"output_format": {
"enum": [
"mp3",
"wav",
"flac",
"opus"
],
"type": "string",
"default": "mp3",
"description": "Format of the normalised file."
},
"loudness_range_lu": {
"type": "number",
"maximum": 30,
"minimum": 1,
"description": "Loudness range target, only with target=custom."
}
},
"additionalProperties": false
},
"price_model": "per_call",
"x402Version": 2,
"instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
"payment_header": "PAYMENT-SIGNATURE",
"capability_request": {
"url": "https://bedarf.halowerk.com/capabilities/request",
"cost": "free",
"method": "POST",
"description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
"body_example": {
"max_price": 0.01,
"description": "what exactly is needed",
"requested_capability": "short label"
}
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.008USDC≈ $0.008 USD
on Base · exact scheme
Pay 0.008 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 8000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "8000",
"scheme": "exact",
"network": "eip155:8453",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"audio": {
"url": "https://example.com",
"content_base64": "Beispieltext."
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"audio"
],
"properties": {
"audio": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL."
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The file inline, base64."
}
},
"description": "The recording. Either url or content_base64.",
"additionalProperties": false
},
"target": {
"enum": [
"streaming",
"podcast",
"broadcast_eu",
"broadcast_us",
"custom"
],
"type": "string",
"default": "streaming",
"description": "Named target. streaming is -14 LUFS."
},
"target_lufs": {
"type": "number",
"maximum": -5,
"minimum": -40,
"description": "Integrated loudness target, only with target=custom."
},
"true_peak_db": {
"type": "number",
"maximum": 0,
"minimum": -9,
"description": "True peak ceiling in dBTP, only with target=custom."
},
"output_format": {
"enum": [
"mp3",
"wav",
"flac",
"opus"
],
"type": "string",
"default": "mp3",
"description": "Format of the normalised file."
},
"loudness_range_lu": {
"type": "number",
"maximum": 30,
"minimum": 1,
"description": "Loudness range target, only with target=custom."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-13 11:45Z
- Last indexed by Roundhouse
- 2026-09-12 11:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 16:15Z
- 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. 18 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 audio.halowerk.com 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=audio.halowerk.com' 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://audio.halowerk.com/loudness-normalise, 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://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.