← The evidence ledger
Evidence row 4489
Observed , by baseline/1.
- Kind
- listing
- About
- source_record agentic_market:x402-halowerk-com
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- eadeb79cd3368313da0b51b2b10c79edf62d357f814e158f2a64307ce4728d05
- Leaf
- 0x3c6c34f577cb952805e4f286851afee0427fdbab75e341c15e32f0f8509fec10
What was observed
{
"endpoints": [
[
"x402",
"https://x402.halowerk.com/benchmark/price"
],
[
"x402",
"https://x402.halowerk.com/channel/audit"
],
[
"x402",
"https://x402.halowerk.com/facilitator/health"
],
[
"x402",
"https://x402.halowerk.com/guard/replay"
],
[
"x402",
"https://x402.halowerk.com/offer/parse"
],
[
"x402",
"https://x402.halowerk.com/offer/validate"
],
[
"x402",
"https://x402.halowerk.com/policy/check"
],
[
"x402",
"https://x402.halowerk.com/receipt/verify"
],
[
"x402",
"https://x402.halowerk.com/reconcile"
],
[
"x402",
"https://x402.halowerk.com/route/optimize"
],
[
"x402",
"https://x402.halowerk.com/settlement/verify"
]
],
"name": "x402.halowerk.com",
"owner_address": null,
"raw": {
"caip2_networks": [
"eip155:8453"
],
"category": "",
"description": "",
"domain": "x402.halowerk.com",
"endpoints": [
{
"description": "Reads the public x402 Bazaar catalogue and finds offers comparable to yours, either from a resource_url whose 402 challenge is fetched without paying, or from a category and description you supply. Every comparable offer is listed with its price, its provider host, a similarity score and the terms both sides share, so comparability is justified rather than asserted; the formula, its weights and the inclusion threshold are stated in the answer. Prices are aggregated as median, p25 and p75 over co",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "market-data",
"group": "body",
"name": "category",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "https://example.com",
"group": "body",
"name": "resource_url",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.006",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/benchmark/price"
},
{
"description": "Checks vouchers of a payment channel by computation only - nothing is ever claimed, redeemed or refunded. Signatures are verified cryptographically against the address each voucher claims to be signed by, in EIP-712 form when the typed data is supplied, otherwise as a plain message signature. Double spending is the expensive case and is checked in full: every voucher id occurring more than once is reported with all its occurrences and whether the duplicates agree on the amount. Sums are added up",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "vouchers",
"required": false,
"type": "array"
}
],
"pricing": {
"amount": "0.006",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "3"
},
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/channel/audit"
},
{
"description": "Asks every known facilitator what it supports and measures how long that answer takes. Reachability, supported chains, supported assets, supported schemes and the current response time are measured live on every call. Limits, and they are the important part: error rate over 24 hours, uptime over 7 days and latency percentiles CANNOT be delivered. They require a series of own measurements every few minutes, and this service keeps no such series - a single call cannot produce a p95. Those fields s",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "eip155:8453",
"group": "body",
"name": "chain",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "facilitators",
"required": false,
"type": "array"
}
],
"pricing": {
"amount": "0.003",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "3"
},
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/facilitator/health"
},
{
"description": "A stateful duplicate check for agents that settle x402 payments. Supply any of payment_id, payload_hash and nonce; each is hashed with SHA-256 before storage, so the service keeps fingerprints and timestamps and never the values themselves, never a payload, never an address. The answer states for every supplied identifier whether it was seen before, when it was first and last seen, how often, and whether the first sighting falls inside window_seconds. The recommendation is ablehnen only for a re",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "0x0000000000000000000000000000000000000000000000000000000000000000",
"group": "body",
"name": "payload_hash",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "beispiel",
"group": "body",
"name": "payment_id",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/guard/replay"
},
{
"description": "Fetches the 402 challenge of a foreign endpoint without paying anything — no payment header, no signature, no settlement — or parses a challenge you already hold. Returns x402_version, every accepts entry with scheme, network, resolved network name and chain id, asset, symbol, decimals and the amount both in raw units and in human form, plus the resource block and any expiry. amount_human is computed with the decimals of that token, resolved from a known-asset table or read from the chain; where decimals cannot be established it stays null and is listed in unavailable_fields rather than assuming six. parse_warnings names concrete gaps such as a missing description or missing inputSchema, a non-CAIP-2 network, a bridged instead of canonical asset, or an amount sent as a JSON number. It does not judge the service, does not pay, does not verify signatures and does not check whether the seller delivers. Answers for a URL are cached for 60 seconds; age_ms states the age of the fetched challenge.",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "https://example.com",
"group": "body",
"name": "url",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/offer/parse"
},
{
"description": "Validates a 402 challenge — fetched from a URL without paying, or supplied directly — against PaymentRequiredV1Schema and PaymentRequiredV2Schema of the installed @x402/core reference implementation. Reports the detected version and how it was detected, every error with field, expected, found and spec_ref naming package, version, schema and field path, whether the network is valid CAIP-2, whether the asset is a known and canonical token address or a bridged variant, whether the declared inputSch",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "https://example.com",
"group": "body",
"name": "url",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/offer/validate"
},
{
"description": "A stateless rule check for agents that pay for x402 endpoints. You supply the proposed payment, your policy and the amounts already spent this hour and this day; this endpoint keeps no ledger of its own and returns your counters unchanged. Every configured rule — max_per_call, max_per_hour, max_per_day, allowed_chains, allowed_assets, allowed_recipients, blocked_recipients, require_schema — is reported individually as erfuellt, verletzt, nicht_pruefbar or nicht_gesetzt, together with the limit a",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "policy",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "proposed_payment",
"required": false,
"type": "object"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/policy/check"
},
{
"description": "Cryptographic verification of the offer-receipt extension of x402. Accepts a signed offer in eip712, jws or eip191 form — either bundled as {format, payload, signature} or as payload plus a separate signature — and an optional signed receipt. Recovers the signer, compares it with the payTo of the offer, compares receipt and offer field by field and names every divergence with the value on each side, checks whether the offer has expired and whether the receipt timestamps are plausible against sta",
"method": "POST",
"parameters": [],
"pricing": {
"amount": "0.003",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/receipt/verify"
},
{
"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",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"group": "body",
"name": "address",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"group": "body",
"name": "asset",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "base",
"group": "body",
"name": "chain",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "receipts",
"required": false,
"type": "array"
}
],
"pricing": {
"amount": "0.008",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/reconcile"
},
{
"description": "Takes what the caller holds and what the seller accepts and works out which combinations can settle the amount. All costs are brought into USD, otherwise no comparison is possible: gas on the source chain plus, where needed, the cost of a swap or a bridge. Routes that require a swap or a bridge are marked explicitly - they often look cheaper on paper and are slower and riskier in practice. Every assumption is named in assumptions; nothing is folded in silently. Limits: gas costs are ORDERS OF MA",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "accepted_by_seller",
"required": false,
"type": "array"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": 0.000001,
"group": "body",
"name": "amount_usd",
"required": false,
"type": "number"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": [],
"group": "body",
"name": "available",
"required": false,
"type": "array"
}
],
"pricing": {
"amount": "0.005",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": null,
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/route/optimize"
},
{
"description": "Reads the receipt of a transaction on Ethereum, Base, Base Sepolia, OP Mainnet, Arbitrum One, Polygon PoS or Avalanche C-Chain and compares it with what you expected to be paid. The comparison runs against the ERC-20 transfer events in the receipt, not against the transaction recipient, because in a token payment the transaction recipient is the token contract and never the seller. Returns every transfer event with sender, recipient, token, raw amount and human amount computed with that token de",
"method": "POST",
"parameters": [
{
"default": null,
"description": "",
"enumValues": [],
"example": "arb",
"group": "body",
"name": "chain",
"required": false,
"type": "string"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": null,
"group": "body",
"name": "expected",
"required": false,
"type": "object"
},
{
"default": null,
"description": "",
"enumValues": [],
"example": "0x0000000000000000000000000000000000000000000000000000000000000000",
"group": "body",
"name": "tx_hash",
"required": false,
"type": "string"
}
],
"pricing": {
"amount": "0.002",
"currency": "USDC",
"maxAmount": "",
"minAmount": "",
"network": "eip155:8453",
"scheme": "exact"
},
"providerName": "",
"quality": {
"l30DaysTotalCalls": "3",
"l30DaysUniquePayers": "3"
},
"serviceName": "HALOWERK x402werk",
"tags": [],
"url": "https://x402.halowerk.com/settlement/verify"
}
],
"enriched": false,
"iconUrl": "",
"id": "x402-halowerk-com",
"integrationType": "",
"isNew": false,
"name": "x402.halowerk.com",
"networks": [
"Base"
],
"priceSummary": {
"avgCostBasis": "exact",
"avgCostPerTransaction": "0.003727",
"currency": "USDC",
"maxAmount": "0.008",
"minAmount": "0.002"
},
"provider": "x402.halowerk.com",
"providerUrl": "",
"serviceName": "HALOWERK x402werk",
"tags": []
},
"source": "agentic_market",
"summary": ""
}What the leaf hashes
{"body":"eadeb79cd3368313da0b51b2b10c79edf62d357f814e158f2a64307ce4728d05","id":4489,"kind":"listing","method":"baseline/1","observed_us":1793025277973437,"prev":null,"subject":"agentic_market:x402-halowerk-com","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x3c6c7504b0e7f219ee81a5b27f11feb2ab0a4ca733aa4a6ec8f0497d743078af
- 0x17273fd4361f4605d2ff753cb21a31b1292253d38d145ca2f9421064c0618d07
- 0x8fe4d5adf64aa80160a1409028a7209b826b493c97641de64e237ddcfad1ee6c
- 0xd290d07853800480025d650a7d351789a7be65a49c7abb7f64e9669957d66efa
- 0x3e17c910adbbf5437a8b8d4dac254e41b14088c321571f19784122a4758117f8
- 0x749afa5ff0f65a2414be57916431d087038675c0666e872c4c9845da932ac3eb
- 0xe71ce4452a3c18964e90e2b3e1ffadc49e18497ec2b886be44df515676869f76
- 0x80d479552012f6e936eed072d101dc52e1a752572cfb197539a94b42817516d8
- 0xf3377e5a3d9ffa09ca4a8f90e033745dad5af466386e85882a894e4c3fbfb0f4
- 0x210e4fd4b2b60dbd88a7f42093d3d642e105b1738155bf382034c694bee5fbcf
- 0xd7dd18a37a5bb07e81a8083d8d1469e052ceebb2814b00f5a8d4f4cd181a5108
- 0xd04df0f7f3be4d014b4cea8172ada286fbcf5bcb32ae1b281704fd75627b661b
- 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
- 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
- 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae