HALOWERK defiwerk
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
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.
$11.47
Verified settled volume
2,656 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0040
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-09 18:18Z
—
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://defi.halowerk.com/llms.txt",
"name": "oracle_crosscheck",
"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": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://defi.halowerk.com/pricing",
"summary": "Cross-checks one asset price across Chainlink, Pyth, RedStone, centralised exchanges and on-chain DEX spot and TWAP, and reports the age of every single source, the spread between them and which sources sit in pools thin enough to be pushed.",
"resource": {
"url": "https://defi.halowerk.com/oracle/crosscheck",
"iconUrl": "https://defi.halowerk.com/favicon.svg",
"mimeType": "application/json",
"description": "Reads a Chainlink aggregator directly from the chain, pulls Pyth and RedStone, queries public exchange tickers and derives spot plus a 30-minute TWAP from the deepest Uniswap V3 pool of the asset against USDC on the requested chain. Every source carries its own age in seconds, its own price and a link to verify it. Nothing is smoothed into an average: the median is stated alongside the full list and the maximum deviation in basis points, because disagreement between sources is the finding, not a",
"serviceName": "HALOWERK defiwerk"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"asset": "ETH",
"chain": "base"
},
"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": [
"chain",
"asset"
],
"properties": {
"asset": {
"enum": [
"ETH",
"BTC",
"USDC",
"USDT",
"DAI",
"LINK",
"CBETH",
"AERO"
],
"type": "string",
"description": "Asset symbol. Only assets whose sources were individually verified against the chain are available."
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain the on-chain sources are read from. Off-chain sources are chain independent."
},
"oracles": {
"type": "array",
"items": {
"enum": [
"chainlink",
"pyth",
"redstone",
"cex",
"dex_spot",
"dex_twap"
],
"type": "string"
},
"description": "Optional filter for source types. Omitted means all available types."
}
},
"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": "0.004",
"description": "Reads a Chainlink aggregator directly from the chain, pulls Pyth and RedStone, queries public exchange tickers and derives spot plus a 30-minute TWAP from the deepest Uniswap V3 pool of the asset against USDC on the requested chain. Every source carries its own age in seconds, its own price and a link to verify it. Nothing is smoothed into an average: the median is stated alongside the full list and the maximum deviation in basis points, because disagreement between sources is the finding, not a defect to hide. Sources quoted against USDT rather than USD are named and excluded from the median. DEX spot prices out of pools below the disclosed depth threshold are flagged as thin and therefore pushable. Chainlink heartbeat and deviation threshold are configuration that does not live on the aggregator contract — they stay null rather than being asserted, and an observed update interval derived from the last two rounds is given instead. Delivers no recommendation, no trading signal and no protection promise; every threshold used for the risk wording is listed in the answer.",
"inputSchema": {
"type": "object",
"required": [
"chain",
"asset"
],
"properties": {
"asset": {
"enum": [
"ETH",
"BTC",
"USDC",
"USDT",
"DAI",
"LINK",
"CBETH",
"AERO"
],
"type": "string",
"description": "Asset symbol. Only assets whose sources were individually verified against the chain are available."
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain the on-chain sources are read from. Off-chain sources are chain independent."
},
"oracles": {
"type": "array",
"items": {
"enum": [
"chainlink",
"pyth",
"redstone",
"cex",
"dex_spot",
"dex_twap"
],
"type": "string"
},
"description": "Optional filter for source types. Omitted means all available types."
}
},
"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.",
"outputSchema": {
"type": "object"
},
"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.
0.004USDC≈ $0.004 USD
on Base · exact scheme
Pay 0.004 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 4000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"asset": "ETH",
"chain": "base"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"chain",
"asset"
],
"properties": {
"asset": {
"enum": [
"ETH",
"BTC",
"USDC",
"USDT",
"DAI",
"LINK",
"CBETH",
"AERO"
],
"type": "string",
"description": "Asset symbol. Only assets whose sources were individually verified against the chain are available."
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain the on-chain sources are read from. Off-chain sources are chain independent."
},
"oracles": {
"type": "array",
"items": {
"enum": [
"chainlink",
"pyth",
"redstone",
"cex",
"dex_spot",
"dex_twap"
],
"type": "string"
},
"description": "Optional filter for source types. Omitted means all available types."
}
},
"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
- 2026-08-09 18:18Z
- Last indexed by Roundhouse
- 2026-09-08 18:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 19:15Z
- 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. 16 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 HALOWERK defiwerk 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=HALOWERK%20defiwerk' 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://defi.halowerk.com/oracle/crosscheck, 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.