← The evidence ledger
Evidence row 751224
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://crosscheckapi.com/v1/accept-lite
- Recorded
- Previous row
- #72806
- Body SHA-256
- a134ba9feb5247499c6e4fc4676dbc6e0654b7bf60f6b41fab6e7d06414d5231
- Leaf
- 0x5e515a3bb9e72bcc0d5cef2ba97136e4e360e202289db112ff0b2cfeac4ffbf8
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": "2026-10-24T09:52:00.142Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-24T09:51:59.722Z"
},
"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":"a134ba9feb5247499c6e4fc4676dbc6e0654b7bf60f6b41fab6e7d06414d5231","id":751224,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793178720617929,"prev":72806,"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 (231336 rows).
- 0x5e51809d0010c8f0726ee9e3116c7eee721d4aed2739acd5109564319a1c1ae4
- 0x211dac813e688bc3d443ad0f55c4e901b221acc8769726a7505cc92990bdb444
- 0x2d65ca5fec8a287b7afd861ea04fd9ff9f300e988a4eb3ab5a87b359cf59a2d4
- 0xa093623aef9988c7081570554932b83a1b9485f7a0ba5b9e77611908c87b8ead
- 0x76de265f05a5e18b78463d9cddfb6bf8fa2534cc976f7ea15d454eb3818563dd
- 0x12f0e7f0e8d8f3fa5f2c306d633908959f552a6a948a6deb5d3e3292cc824d35
- 0xe9bfc74812f129d94a18cc626ed72e93445083409876ff42afd5c71a8e631658
- 0x6964bdff7de4c0bb9a13deb1d9d4ab8eeb60b94b75d4ce297d52d5dfc7b1771e
- 0x83f85422c99c1a5adf063c08a4311cab18dc29e9ab728d5ee141a84b30595608
- 0xf4903925dad6769820fcf5a22a7a275598a9d1ffc8b71e8d5547219645eda8de
- 0x60092baa15b626d1471c65ad922fee1e1ef25ffe6ce503b232a651d88ee4db38
- 0xde0ed5a99a265aff1ac56d5267182affd04ee042cab0cdeb668f49339e723a42
- 0xef15c536e795866a8bfb1b8a73e9760d27d138ecef7ee9cc237288f3c6490bbc
- 0x8db2587099a4011758c742fc2aad940742aa47abddf6007f131e0d5ab4a9e92b
- 0xe6054de1f67b1e6f15bcf16d2b6536cf35dd9705fdf6ce59853e79784693ab5f
- 0xa99a40fe210d675bb6ab72d4bb72ab40eb44ac345773c457fbe58e67a47b03df
- 0x7a743a0a09057bae687051274e1d45bf973bd36a1a4ba16a191b5d29e3bdfa2a
- 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f
- Day root
- 0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e
- Chained
- 0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be
- Published
- On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae