← The evidence ledger
Evidence row 75049
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://factstamp.agentrails.workers.dev/package
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 0a108af03a76b5145e11769d3c5eb9e80564549621593564b441993798a6821f
- Leaf
- 0xa9bffe17531a2a607e683cdbcff292f80bff293d7f62bf7f4bf3cb621cdf02cb
What was observed
{
"endpoints": [
[
"x402",
"https://factstamp.agentrails.workers.dev/package"
]
],
"name": "factstamp.agentrails.workers.dev/package",
"owner_address": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"description": "Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300,
"mimeType": "application/json",
"network": "eip155:8453",
"payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
"resource": "https://factstamp.agentrails.workers.dev/package",
"scheme": "exact"
}
],
"description": "Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"ecosystem": "npm",
"package": "express@4.18.2"
},
"bodyType": "application/json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"advisories": [
{
"id": "GHSA-qw6h-vgh9-j6wx"
},
{
"id": "GHSA-rv95-896h-c2vc"
}
],
"deprecated": null,
"detail": "2 advisory record(s) published against express@4.18.2.",
"ecosystem": "npm",
"latest": "5.2.1",
"name": "express",
"published_at": "2022-10-08T20:14:32.495Z",
"query": "express@4.18.2",
"sources": [
{
"http_status": 200,
"name": "npm registry"
},
{
"http_status": 200,
"name": "OSV"
}
],
"verdict": "advisory",
"version": "4.18.2",
"yanked": false
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"input": {
"additionalProperties": true,
"properties": {
"body": {
"type": "object"
},
"bodyType": {
"const": "application/json"
},
"method": {
"const": "POST"
},
"type": {
"const": "http"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"additionalProperties": true,
"properties": {
"example": {
"type": "object"
},
"type": {
"const": "json"
}
},
"required": [
"type",
"example"
],
"type": "object"
}
},
"required": [
"input",
"output"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-05T20:17:14.192Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-05T20:17:13.719Z"
},
"resource": "https://factstamp.agentrails.workers.dev/package",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown."
}What the leaf hashes
{"body":"0a108af03a76b5145e11769d3c5eb9e80564549621593564b441993798a6821f","id":75049,"kind":"listing","method":"baseline/1","observed_us":1793025489989472,"prev":null,"subject":"x402_bazaar:https://factstamp.agentrails.workers.dev/package","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).
- 0xa9c012107abcdc116b93fe939068694bc0e8492125aeff863d28935277ee039c
- 0x8b0a5ed33766f5c4f4a7fadc966310ca5bf0e77ab10c2b6800524436a132a43d
- 0xd209742110f16c15f20ec12f7b3ca9c0209a6d2a8c9e5d198504dc162b29647f
- 0x5cda8113ade82f3fe9b3ab7fe1d19cb7b86e7206d4bb7a60542f253fc2032fca
- 0x1088ffce6fde7645bfa0882eaab42e77c0f19b6f11d1d648a8e26e1df5ff9135
- 0xfa999c9108045f462f7c6b1ccf8339e63f5b94f7d2c4c41dcc5b1488a80106e9
- 0x5e0dc3c45de15fbd37d0ab05eb3a7fca1ee1a4ddd06147a0c77b4a8b49bbb233
- 0x3f7ae58b206c51fc427f754b9bf85a76e953c0216bd09128c03a01e3643b9713
- 0x82d9ae554aa7cec8f51a37c603e34e767e325b0595e6cdd1f431b89b2f287159
- 0xdafe89e6fd113360e44ef4b5cf78f02090d7d8c58f90801b9c55d378ade0c6ae
- 0x55ba80743bf45624f0b04651dfd0a37e2a85f91f45e334ff14efbb74a49dd361
- 0x09a19b8d31a6e948e5051cb72b98b1d2b2bfe053f62d6d24d61c22b3ed1c3f24
- 0x4700d6dfdb40e52e2ceb8ffe62c75f3f708d23452f828255fd003d795f5d9d66
- 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
- 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae