HALOWERK x402werk
HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.
OtherLiveeip155:8453Exactvia 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
2,655 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-09 18:34Z
—
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://x402.halowerk.com/llms.txt",
"name": "x402_reconcile",
"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",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://x402.halowerk.com/pricing",
"summary": "Matches your x402 receipts against the token transfers that actually reached your address on chain, and lists every receipt without a payment and every payment without a receipt.",
"resource": {
"url": "https://x402.halowerk.com/reconcile",
"iconUrl": "https://x402.halowerk.com/favicon.svg",
"mimeType": "application/json",
"description": "Reads all incoming ERC-20 transfers of one token to one address within a block or time window and matches them against the receipts you supply. Matching runs first over the transaction hash, which is the strongest link, and otherwise over amount plus payer plus a stated time tolerance; the method used is named for every single match, so a weak match is never mistaken for a strong one. The answer lists matched pairs, receipts without a payment, payments without a receipt, amount mismatches with e",
"serviceName": "HALOWERK x402werk"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"chain": "base",
"address": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"receipts": [
{
"payer": "0x617DF6d675425ab4bc3A71e67d1915E026EDCC9f",
"tx_hash": "0x8af5bfe08aabed10644fcea6d5fa60b63555355ef1441d94cdbb44408c4be922",
"payment_id": "audit-phone-20260809",
"receipt_id": "phone-parse-20260809",
"amount_units": "1000"
}
]
},
"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",
"address",
"receipts"
],
"properties": {
"asset": {
"type": "string",
"description": "Token contract address to reconcile. Defaults to the canonical USDC of that chain."
},
"chain": {
"enum": [
"arb",
"arbitrum",
"arbitrum-one",
"avalanche",
"avax",
"base",
"base-mainnet",
"base-sepolia",
"basesepolia",
"eip155:1",
"eip155:10",
"eip155:137",
"eip155:42161",
"eip155:43114",
"eip155:8453",
"eip155:84532",
"eth",
"ethereum",
"ethereum-mainnet",
"mainnet",
"matic",
"op",
"op-mainnet",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain as CAIP-2, short name or chain id."
},
"window": {
"type": "object",
"properties": {
"to": {
"type": "integer",
"description": "End of the window as unix seconds."
},
"from": {
"type": "integer",
"description": "Start of the window as unix seconds. Resolved to a block by reading real blocks."
},
"to_block": {
"type": "integer",
"minimum": 0,
"description": "End block. Takes precedence over to."
},
"from_block": {
"type": "integer",
"minimum": 0,
"description": "Start block. Takes precedence over from."
}
},
"additionalProperties": false
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Your receiving address whose incoming transfers should be read."
},
"receipts": {
"type": "array",
"items": {
"type": "object",
"required": [
"amount_units"
],
"properties": {
"ts": {
"type": "integer",
"description": "Unix seconds when the receipt was issued. Needed for the amount-and-time fallback match."
},
"payer": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Address you believe paid."
},
"tx_hash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Settlement transaction hash, if you recorded one."
},
"payment_id": {
"type": "string",
"maxLength": 200,
"description": "Payment identifier, used to detect duplicate receipts."
},
"receipt_id": {
"type": "string",
"maxLength": 200,
"description": "Your own identifier for this receipt. Echoed back in every result."
},
"amount_units": {
"type": "string",
"pattern": "^[0-9]{1,78}$",
"description": "Amount as an integer in the smallest unit of the token."
}
},
"additionalProperties": false
},
"maxItems": 500,
"minItems": 1,
"description": "Your receipts. Each needs at least amount_units; tx_hash makes the match strong, payer and ts make the fallback match possible."
},
"time_tolerance_seconds": {
"type": "integer",
"default": 300,
"maximum": 86400,
"minimum": 0,
"description": "How far a receipt timestamp may sit from the block time of a payment and still match. Receipt and chain rarely carry the same second."
}
},
"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": "Reads all incoming ERC-20 transfers of one token to one address within a block or time window and matches them against the receipts you supply. Matching runs first over the transaction hash, which is the strongest link, and otherwise over amount plus payer plus a stated time tolerance; the method used is named for every single match, so a weak match is never mistaken for a strong one. The answer lists matched pairs, receipts without a payment, payments without a receipt, amount mismatches with expected, found and difference, and duplicate receipts sharing a transaction hash or payment identifier. Totals are given for both sides with their difference, plus coverage_pct and the window actually used, including the block range and how timestamps were resolved to blocks. Unmatched items are never quietly dropped — they are the point of the exercise. Block timestamps are read from the chain for up to sixty distinct blocks; beyond that the timestamp of a payment stays null and says so. The window is limited to 114000 blocks per call because public RPC providers cap log queries; a larger request is rejected instead of silently truncated.",
"inputSchema": {
"type": "object",
"required": [
"chain",
"address",
"receipts"
],
"properties": {
"asset": {
"type": "string",
"description": "Token contract address to reconcile. Defaults to the canonical USDC of that chain."
},
"chain": {
"enum": [
"arb",
"arbitrum",
"arbitrum-one",
"avalanche",
"avax",
"base",
"base-mainnet",
"base-sepolia",
"basesepolia",
"eip155:1",
"eip155:10",
"eip155:137",
"eip155:42161",
"eip155:43114",
"eip155:8453",
"eip155:84532",
"eth",
"ethereum",
"ethereum-mainnet",
"mainnet",
"matic",
"op",
"op-mainnet",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain as CAIP-2, short name or chain id."
},
"window": {
"type": "object",
"properties": {
"to": {
"type": "integer",
"description": "End of the window as unix seconds."
},
"from": {
"type": "integer",
"description": "Start of the window as unix seconds. Resolved to a block by reading real blocks."
},
"to_block": {
"type": "integer",
"minimum": 0,
"description": "End block. Takes precedence over to."
},
"from_block": {
"type": "integer",
"minimum": 0,
"description": "Start block. Takes precedence over from."
}
},
"additionalProperties": false
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Your receiving address whose incoming transfers should be read."
},
"receipts": {
"type": "array",
"items": {
"type": "object",
"required": [
"amount_units"
],
"properties": {
"ts": {
"type": "integer",
"description": "Unix seconds when the receipt was issued. Needed for the amount-and-time fallback match."
},
"payer": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Address you believe paid."
},
"tx_hash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Settlement transaction hash, if you recorded one."
},
"payment_id": {
"type": "string",
"maxLength": 200,
"description": "Payment identifier, used to detect duplicate receipts."
},
"receipt_id": {
"type": "string",
"maxLength": 200,
"description": "Your own identifier for this receipt. Echoed back in every result."
},
"amount_units": {
"type": "string",
"pattern": "^[0-9]{1,78}$",
"description": "Amount as an integer in the smallest unit of the token."
}
},
"additionalProperties": false
},
"maxItems": 500,
"minItems": 1,
"description": "Your receipts. Each needs at least amount_units; tx_hash makes the match strong, payer and ts make the fallback match possible."
},
"time_tolerance_seconds": {
"type": "integer",
"default": 300,
"maximum": 86400,
"minimum": 0,
"description": "How far a receipt timestamp may sit from the block time of a payment and still match. Receipt and chain rarely carry the same second."
}
},
"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",
"properties": {
"age_ms": {
"type": "integer"
},
"totals": {
"type": "object"
},
"matched": {
"type": "array",
"items": {
"type": "object"
}
},
"duplicates": {
"type": "array",
"items": {
"type": "object"
}
},
"ts_fetched": {
"type": "integer"
},
"window_used": {
"type": "object"
},
"coverage_pct": {
"type": "number"
},
"thresholds_used": {
"type": "object"
},
"amount_mismatches": {
"type": "array",
"items": {
"type": "object"
}
},
"unavailable_fields": {
"type": "array",
"items": {
"type": "string"
}
},
"payments_without_receipt": {
"type": "array",
"items": {
"type": "object"
}
},
"receipts_without_payment": {
"type": "array",
"items": {
"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.
0.008USDC≈ $0.008 USD
on Base · exact scheme
Pay 0.008 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 8000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "8000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"chain": "base",
"address": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"receipts": [
{
"payer": "0x617DF6d675425ab4bc3A71e67d1915E026EDCC9f",
"tx_hash": "0x8af5bfe08aabed10644fcea6d5fa60b63555355ef1441d94cdbb44408c4be922",
"payment_id": "audit-phone-20260809",
"receipt_id": "phone-parse-20260809",
"amount_units": "1000"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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",
"address",
"receipts"
],
"properties": {
"asset": {
"type": "string",
"description": "Token contract address to reconcile. Defaults to the canonical USDC of that chain."
},
"chain": {
"enum": [
"arb",
"arbitrum",
"arbitrum-one",
"avalanche",
"avax",
"base",
"base-mainnet",
"base-sepolia",
"basesepolia",
"eip155:1",
"eip155:10",
"eip155:137",
"eip155:42161",
"eip155:43114",
"eip155:8453",
"eip155:84532",
"eth",
"ethereum",
"ethereum-mainnet",
"mainnet",
"matic",
"op",
"op-mainnet",
"optimism",
"polygon"
],
"type": "string",
"description": "Chain as CAIP-2, short name or chain id."
},
"window": {
"type": "object",
"properties": {
"to": {
"type": "integer",
"description": "End of the window as unix seconds."
},
"from": {
"type": "integer",
"description": "Start of the window as unix seconds. Resolved to a block by reading real blocks."
},
"to_block": {
"type": "integer",
"minimum": 0,
"description": "End block. Takes precedence over to."
},
"from_block": {
"type": "integer",
"minimum": 0,
"description": "Start block. Takes precedence over from."
}
},
"additionalProperties": false
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Your receiving address whose incoming transfers should be read."
},
"receipts": {
"type": "array",
"items": {
"type": "object",
"required": [
"amount_units"
],
"properties": {
"ts": {
"type": "integer",
"description": "Unix seconds when the receipt was issued. Needed for the amount-and-time fallback match."
},
"payer": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Address you believe paid."
},
"tx_hash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Settlement transaction hash, if you recorded one."
},
"payment_id": {
"type": "string",
"maxLength": 200,
"description": "Payment identifier, used to detect duplicate receipts."
},
"receipt_id": {
"type": "string",
"maxLength": 200,
"description": "Your own identifier for this receipt. Echoed back in every result."
},
"amount_units": {
"type": "string",
"pattern": "^[0-9]{1,78}$",
"description": "Amount as an integer in the smallest unit of the token."
}
},
"additionalProperties": false
},
"maxItems": 500,
"minItems": 1,
"description": "Your receipts. Each needs at least amount_units; tx_hash makes the match strong, payer and ts make the fallback match possible."
},
"time_tolerance_seconds": {
"type": "integer",
"default": 300,
"maximum": 86400,
"minimum": 0,
"description": "How far a receipt timestamp may sit from the block time of a payment and still match. Receipt and chain rarely carry the same second."
}
},
"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 18:34Z
- Last indexed by Roundhouse
- 2026-09-08 18:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 18:45Z
- 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 x402werk 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%20x402werk' 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.halowerk.com/reconcile, 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.