← The evidence ledger
Evidence row 1508411
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://crosscheckapi.com/v1/accept-lite
- Recorded
- Previous row
- #1261890
- Body SHA-256
- cdc7fe888a67f446b7496508c8c71f781253db0bdbe7a5956458e1cde251304c
- Leaf
- 0xa551c0ee24f0871185188e485200cad8a01f959879310f524f626e96f70cd491
What was observed
{
"endpoints": [
[
"x402",
"https://crosscheckapi.com/v1/accept-lite"
]
],
"name": "Verify deliverable, code only",
"owner_address": "0x2fe63598ad75281fa36d271f4c155a074296a943",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"paymentFlow": "upfront",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x2Fe63598Ad75281fA36d271f4c155a074296A943",
"scheme": "exact"
},
{
"amount": "5000",
"asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
"extra": {
"name": "USDC",
"paymentFlow": "upfront",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:84532",
"payTo": "0x2Fe63598Ad75281fA36d271f4c155a074296A943",
"scheme": "exact"
}
],
"description": "Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written sums, totals, percentages, dates, weekdays, time spans, unit conversions, and list counts; checks lengths the task asks for; flags placeholders and prompt injection; measures words, items, and JSON shape. Signed receipt, tier lite. For every requirement judged, use accept ($0.03).",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"deliverable": "Q3 spend came to $8,450 in total ($4,200 on ads, $2,850 on tools, and $1,900 on contractors).",
"task": "Summarize Q3 spend by category in under 50 words."
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"job_id": "chk_6c2e9a0f1d3b4e5a8c7d6e5f4a3b2c1d",
"receipt": {
"body": {
"kind": "accept_lite",
"seq": 4
},
"hash": "...",
"sig": "..."
},
"result_token": "...",
"result_url": "https://crosscheckapi.com/v1/checks/chk_6c2e9a0f1d3b4e5a8c7d6e5f4a3b2c1d",
"share_url": "https://crosscheckapi.com/r/...",
"status": "done",
"verdict": {
"code_checks": {
"found": 1,
"measured": {
"words": 17
},
"wrong_date_spans": [],
"wrong_lengths": [],
"wrong_list_counts": [],
"wrong_percentages": [],
"wrong_sums": [
{
"comes_to": "8,950",
"says": "$8,450",
"sentence": "Q3 spend came to $8,450 in total ($4,200 on ads, $2,850 on tools, and $1,900 on contractors)."
}
],
"wrong_superlatives": [],
"wrong_time_spans": [],
"wrong_time_zones": [],
"wrong_units": [],
"wrong_weekdays": []
},
"injection_suspected": false,
"note": "Lite tier: code only, no model call. Code checked the deliverable's own sums, percentages, dates, time spans, time zones, units, list counts, and lengths the task asks for; whether it is a placeholder; and known prompt-injection phrases; and measured its words, list items, and JSON shape. It did not read the task's requirements one by one; POST /v1/accept ($0.03) for that.",
"pass": false,
"placeholder": false,
"problems": 1,
"result": "problems_found",
"summary": "Code found 1 problem in the deliverable: 1 wrong figure or date (see code_checks).",
"tier": "lite"
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"deliverable": {
"description": "What came back, exactly as received",
"minLength": 1,
"type": "string"
},
"payment_network": {
"description": "CAIP-2 network of payment_tx, default eip155:8453",
"type": "string"
},
"payment_tx": {
"description": "Optional: the transaction you paid the other agent with; verified on-chain and bound to the receipt",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
"ref": {
"description": "Optional: the hash of a crosscheck receipt that referred you. Its wallet earns check credits from your first 90 days of spend.",
"pattern": "^[0-9a-f]{64}$",
"type": "string"
},
"reference": {
"description": "Optional order id or transaction hash to record on the receipt",
"maxLength": 200,
"type": "string"
},
"task": {
"description": "The task you gave the other agent or service, including every requirement",
"minLength": 1,
"type": "string"
}
},
"required": [
"task",
"deliverable"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"job_id": {
"type": "string"
},
"receipt": {
"description": "Ed25519-signed receipt: body (canonical JSON), hash (sha256 hex), sig (base64url)",
"properties": {
"body": {
"type": "object"
},
"hash": {
"type": "string"
},
"sig": {
"type": "string"
}
},
"type": "object"
},
"result_token": {
"type": "string"
},
"result_url": {
"type": "string"
},
"retry_after_seconds": {
"type": "integer"
},
"status": {
"enum": [
"done",
"pending",
"unserved",
"rejected"
],
"type": "string"
},
"verdict": {
"properties": {
"code_checks": {
"description": "What code found (wrong_sums, wrong_percentages, wrong_weekdays, wrong_date_spans, wrong_time_spans, wrong_time_zones, wrong_units, wrong_list_counts, wrong_superlatives, wrong_lengths) and measured (words, list_items, json, json_items)",
"type": "object"
},
"injection_suspected": {
"type": "boolean"
},
"note": {
"type": "string"
},
"pass": {
"description": "True only when code found no problem; never means the task was met",
"type": "boolean"
},
"placeholder": {
"type": "boolean"
},
"problems": {
"type": "integer"
},
"result": {
"enum": [
"problems_found",
"no_problems_found"
],
"type": "string"
},
"summary": {
"type": "string"
},
"tier": {
"enum": [
"lite"
],
"type": "string"
}
},
"required": [
"tier",
"result",
"pass",
"summary",
"problems",
"code_checks",
"placeholder",
"injection_suspected",
"note"
],
"type": "object"
}
},
"required": [
"job_id",
"status"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790220967/bazaar-icons/4124578678809cf3.png",
"lastUpdated": "2026-10-30T10:18:25.97Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-30T10:18:25.556Z"
},
"resource": "https://crosscheckapi.com/v1/accept-lite",
"serviceName": "Verify deliverable, code only",
"tags": [
"verify-output",
"acceptance-test",
"quality-check",
"escrow",
"agent-to-agent"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written sums, totals, percentages, dates, weekdays, time spans, unit conversions, and list counts; checks lengths the task asks for; flags placeholders and prompt injection; measures words, items, and JSON shape. Signed receipt, tier lite. For every requirement judged, use accept ($0.03)."
}What the leaf hashes
{"body":"cdc7fe888a67f446b7496508c8c71f781253db0bdbe7a5956458e1cde251304c","id":1508411,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472712923584,"prev":1261890,"subject":"x402_bazaar:https://crosscheckapi.com/v1/accept-lite","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (246033 rows).
- 0xa551b6943a9c6118ccda6e49bbcd458e40ca4ba8a8fb4986055a48d9e1572e37
- 0xa800666687a5e3d3ffb4241749c76d327f4c4fb7144fc059cf4d96db8c9cc37e
- 0x9e8d4b70e2b12dea6bfadbbf5efbc4e910ea2ee38d5c486a78fdfc02b669c38d
- 0x725caba55f47498a648e46ebce3fcbc9ff3ed70c3252752e53423d989f95b7cd
- 0x1aba10a0638f00bf972fe7a0e6a6d47e5e3f7a4dac91afd8b4cf388f419ddad5
- 0xa51e3d9712aed1148c29bedc07b9f0f66558ee14c120bbd2053df13c6b6f400d
- 0xef499acab8eb3445a993ed07bdec3119d8f7ae5620a4287c49af297c4e6b2b71
- 0x43bc68093ecf7f032a27b805af2bc874a78dc0eac52ceac5416b06fc261c7db2
- 0xbeda137344adc94fc31aecbf25146637527bf6c31a315066cd9fb04dad96f01e
- 0xda2714a1d1c473c3bc08385ea80978d7e0144037d6757ceadd34be6a2108c0cd
- 0x5919af638a1038f89cde3bd207b44bf50cc0d1a75e744920acd5a691bfd3fe93
- 0xc8a5be2d6d9115610947f6b032a85ced3901fcb1cd447098d4fe7cf638150636
- 0xbb0d6a5ef6d4a77fc1050819b844be89ee9cf38eab6c5c080e1d03a1935ecfc3
- 0xfc4e63034c3e47c4cc19a85dbacdb421762119a58090dfe0c71e13f11f75db19
- 0xaada757a4e58b5424e31228ed7c84f378168cc321ac8ae3a78bfc8096bcc0324
- 0x8605635b6c6bd33c6547585212170cc076018c2dd5f81f35a5ac4ade689fbb12
- 0x50003b3c3045b653f8be4232e95e80582cf5c54c14c509ba0a9a197b9e5005cb
- 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57
- Day root
- 0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab
- Chained
- 0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980
- Published
- On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0