← The evidence ledger
Evidence row 72806
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://crosscheckapi.com/v1/accept-lite
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f0d075a55bc7c67068b1a3b151fcfbcceffa3d5586c2934549d65b343cdf00ad
- Leaf
- 0x0dd0c5951d2e7502850691ce18e5c5a57962d12d6e81290932f8bfaffb320704
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": 4,
"l30DaysUniquePayers": 4,
"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":"f0d075a55bc7c67068b1a3b151fcfbcceffa3d5586c2934549d65b343cdf00ad","id":72806,"kind":"listing","method":"baseline/1","observed_us":1793025486504188,"prev":null,"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 (296695 rows).
- 0x0dd0acc89a79e0fd80b40a3658358003d6a06c1edc7e8c61506c95244e8fb94d
- 0xa5a511d8561df9c99659453d3e3b050bcf3b8ed0566a2ff15aa85951febcae6c
- 0xfe69f09568b29b9aabfe7370345f672e28c294e1eff3c31d6e5726e67347bcaf
- 0xebac3ae133158c812b0a42a4980ad50289d44709e6e956479c34efbe16b2306e
- 0x2eda76e21101609d621492fd99c30ca325a6a0f7102698b2635dd59a445fcee2
- 0xc25792c07939f195e889bcff26a53cfec4eec70f86a1ba41c85e2e6d7b649be8
- 0xbdd491dab6de81438ce0be1e99cc4a4f05816b99946c7337992a0528d05a883a
- 0x2bf9e6c3e76457f7bf0940b3173f7892bf624688aa900d2b147fad3d403a058b
- 0xb63e377fabcfa8dee525cf16e5292eb4bf823791d7d6cf20cfedff876058ba79
- 0x6660c80902a0d0eb7e099a74231019f561e7aad745384cd90bc57b2aac09aef3
- 0xce6314435eaa4c458576d2a1150a919748260a8a10f1eae96b7a8bc75ff32536
- 0x362683225b724b8d2d652a95968c57a6f4199ed4f2ad60900fc3603492f17520
- 0x5aefcf9e3d86e125861c0d490079969110eea8fc901ec61531bba10bb58258a1
- 0xa96bb9408ce00a0d40ddaba8736257dfce76d5478b131d69db1afdf8a824312b
- 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae