← The evidence ledger
Evidence row 125414
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://x402-research-iota.vercel.app/api/x402/preflight
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- a098d976e9701946886d73c260b3f77b506e81a26689e0e646ec41976533244e
- Leaf
- 0x9b76a858b1526c2e1358ac5fef57e3ea5b32d1702fbcb2e9dc93579192bdd986
What was observed
{
"endpoints": [
[
"x402",
"https://x402-research-iota.vercel.app/api/x402/preflight"
]
],
"name": "x402-research-iota.vercel.app/api/x402/preflight",
"owner_address": "0xa26f179e42836bc4ae0cea997fdfc9602d5b8147",
"raw": {
"accepts": [
{
"amount": "50000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xa26f179e42836bc4ae0cea997fdfc9602d5b8147",
"scheme": "exact"
}
],
"description": "One-call Base (8453) preflight: risk snapshot + live ERC-20 approvals + OFAC SDN screen + optional x402 invoice check (?invoice= JSON or base64). Returns risk, approvals, invoice, sanctions and summary {verdict proceed|review|stop, flags}. Free sample: /api/preflight/sample. 400 bad input; 503 not charged. Informational, not a guarantee.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"address": "0xf9623fab6780984eacac443158c0309519451afa"
},
"type": "http"
},
"output": {
"example": {
"address": "0xf962...1afa",
"approvals": {
"approvals": [
{
"allowanceFormatted": "unlimited",
"risk": "high",
"spender": "0x1111...0a65",
"symbol": "USDC"
}
],
"highRiskCount": 1,
"status": "ok"
},
"chainId": 8453,
"invoice": null,
"risk": {
"accountType": "eoa",
"flags": [],
"riskLevel": "low"
},
"signed": false,
"summary": {
"approvalsStatus": "ok",
"coverageNote": "Public-data heuristics only... \"none\" never means safe.",
"flags": [
{
"code": "unlimited_approval",
"detail": "Unlimited USDC allowance to spender 0x1111...0a65.",
"level": "high",
"source": "approvals"
}
],
"highRiskCount": 1,
"invoiceVerdict": null,
"riskLevel": "low",
"sanctionsStatus": "clear",
"verdict": "stop",
"verdictNote": "Informational heuristic only, not a guarantee."
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"invoice": {
"description": "optional x402 PaymentRequired, raw JSON or base64",
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"address": {
"type": "string"
},
"approvals": {
"type": "object"
},
"invoice": {
"type": [
"object",
"null"
]
},
"risk": {
"type": "object"
},
"signed": {
"type": "boolean"
},
"summary": {
"properties": {
"coverageNote": {
"type": "string"
},
"flags": {
"items": {
"type": "object"
},
"type": "array"
},
"highRiskCount": {
"type": "number"
}
},
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-24T21:42:39.437Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-24T21:42:39.276Z"
},
"resource": "https://x402-research-iota.vercel.app/api/x402/preflight",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "One-call Base (8453) preflight: risk snapshot + live ERC-20 approvals + OFAC SDN screen + optional x402 invoice check (?invoice= JSON or base64). Returns risk, approvals, invoice, sanctions and summary {verdict proceed|review|stop, flags}. Free sample: /api/preflight/sample. 400 bad input; 503 not charged. Informational, not a guarantee."
}What the leaf hashes
{"body":"a098d976e9701946886d73c260b3f77b506e81a26689e0e646ec41976533244e","id":125414,"kind":"listing","method":"baseline/1","observed_us":1793025626166831,"prev":null,"subject":"x402_bazaar:https://x402-research-iota.vercel.app/api/x402/preflight","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).
- 0x9b7656b32c4f6fa257dbdf6726e876c0677d43d872862525928b5952526329f0
- 0x0004b44c08e0e05430af303c8d3ab148c31101b8f77f23dfc2a67a7eda1098c9
- 0xdd040891a17e36f02261d605c5151040fed5504f7ee163144cab893fac99b95c
- 0xf41c93add808688c56991127065f1062c1e74091427ba6a1dde3ea3fba3d621b
- 0xe772b7c7444d04162084e5a3e7e42912f9d1dd5ae2bb41cdcb639b1b5bd2a0d1
- 0x785d557aea326ab24b0dc4ff69e2024e4e2c9f50fff56cdb51fe44d985923331
- 0xcc05be857796c7ff307409ac7b4d229090fabd78bc3723d118922df288500aca
- 0xeed67277ec0597947e11bf61c8f3d6fec4a4196ae73ed8db61246b96871ca30f
- 0xb03a49015e02ec6c907f2ac497d7fd9d859357c975bc781e04d7c7cdc5cc69bb
- 0x7fc9c551c0bf3724729ea13bb68249f1874a045c6cfd4d9564abfe126a968bcf
- 0xb79ffe067e46a7abdcd59167d8556c652ce9f0f297fbf7808095f49485591c09
- 0xd253212b3d5f7245423cc951067880bc2069b90eeee521363fcee13ebbd606ae
- 0x99a4e0f8b23989f58b564c1b6e419578b4388f6e0dbf6e50177c1bd476302d0e
- 0x6713795704ddd9c528d421fadd9cc96b0200a4ddbba84f88e718d4968dde888b
- 0x62a900133713919f4eed33d8336876b7a6d538233b8a4f3ed03b29aa44f5bad0
- 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae