← The evidence ledger
Evidence row 120540
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/registry/cpan/:dist
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 3df17512710af5f6af5d5c9b8370d54ca5cbd8be20215396c86d2531d42e1c28
- Leaf
- 0x0e61f7852d8fb6fbb6a6f438521c56e47224e253a5122dc957ef8620a1ce5586
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/registry/cpan/:dist"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:cpan-dist",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:cpan-dist",
"reference": "EAyMeJ93SW1HDgS9W9cgHTxx6x7JBK9HG1z9evBfvrG",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjcGFuLWRpc3QiLCJyZWZlcmVuY2UiOiJFQXlNZUo5M1NXMUhEZ1M5VzljZ0hUeHg2eDdKQks5SEcxejlldkJmdnJHIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTIyMjEyMTc5NDF9.C1DPfe55_lCWMw-Tp7tPGhOXOnWS1hU75zeHUPZmIT8"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "CPAN Perl distribution lookup - latest version, abstract, author, licence, runtime dependencies, downstream dependents and open issues from MetaCPAN",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"pathParams": {
"dist": "Moose"
},
"type": "http"
},
"output": {
"example": {
"abstract": "A postmodern object system for Perl 5",
"author": "ETHER",
"bugtracker": "https://rt.cpan.org/Dist/Display.html?Name=Moose",
"direct_dependents": 3149,
"distro_packages": {
"debian": "libmoose-perl",
"fedora": "perl-Moose"
},
"download_url": "https://cpan.metacpan.org/authors/id/E/ET/ETHER/Moose-2.4001.tar.gz",
"downstream_dependents": 4640,
"homepage": "http://moose.perl.org/",
"license": [
"perl_5"
],
"main_module": "Moose",
"maintenance": {
"days_since_update": 15,
"last_update": "2026-10-01T04:35:44.000Z",
"status": "active"
},
"maturity": "released",
"metacpan_url": "https://metacpan.org/dist/Moose",
"module_count": 437,
"name": "Moose",
"open_issues": 74,
"released": "2026-10-01T04:35:44.000Z",
"repository": "https://github.com/moose/Moose",
"runtime_dependencies": 24,
"runtime_dependency_modules": [
"Sub::Exporter",
"Class::Load::XS",
"Carp",
"Module::Runtime::Conflicts",
"Devel::OverloadInfo",
"parent",
"strict",
"Package::DeprecationManager",
"warnings",
"Class::Load",
"List::Util",
"Sub::Util",
"Dist::CheckConflicts",
"Module::Runtime",
"Devel::GlobalDestruction",
"Devel::StackTrace",
"Package::Stash",
"Try::Tiny",
"Package::Stash::XS",
"Params::Util",
"Data::OptList",
"Eval::Closure",
"MRO::Compat",
"Scalar::Util"
],
"source": "MetaCPAN",
"version": "2.4001"
},
"type": "json"
}
},
"routeTemplate": "/api/registry/cpan/:dist",
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"pathParams": {
"properties": {
"dist": {
"description": "CPAN distribution name in the path, e.g. Moose, Mojolicious, DBI",
"type": "string"
}
},
"required": [
"dist"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"pathParams"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"abstract": {
"description": "Abstract text",
"type": "string"
},
"author": {
"description": "Author name",
"type": "string"
},
"bugtracker": {
"type": [
"string",
"null"
]
},
"direct_dependents": {
"description": "Direct dependents",
"type": [
"number",
"null"
]
},
"distro_packages": {
"description": "Distro packages"
},
"download_url": {
"description": "Download URL",
"type": [
"string",
"null"
]
},
"downstream_dependents": {
"description": "Downstream dependents",
"type": [
"number",
"null"
]
},
"homepage": {
"description": "Project homepage URL",
"type": [
"string",
"null"
]
},
"license": {
"description": "License identifier",
"type": "array"
},
"main_module": {
"description": "Main module",
"type": [
"string",
"null"
]
},
"maintenance": {
"type": [
"object",
"null"
]
},
"maturity": {
"type": [
"string",
"null"
]
},
"metacpan_url": {
"description": "Metacpan URL",
"type": [
"string",
"null"
]
},
"module_count": {
"description": "Number of module",
"type": "number"
},
"name": {
"description": "Name",
"type": "string"
},
"open_issues": {
"description": "Open issues",
"type": [
"number",
"null"
]
},
"released": {
"description": "Release date",
"type": [
"string",
"null"
]
},
"repository": {
"description": "Source repository URL",
"type": [
"string",
"null"
]
},
"runtime_dependencies": {
"description": "Runtime dependencies",
"type": "number"
},
"runtime_dependency_modules": {
"description": "Runtime dependency modules",
"type": [
"array",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"version": {
"description": "Version identifier",
"type": "string"
}
},
"required": [
"name",
"version"
],
"type": "object"
},
"type": {
"const": "json",
"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/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-17T07:11:37.979Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-17T07:11:37.576Z"
},
"resource": "https://saylorinnovations.com/api/registry/cpan/:dist",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"cpan module info",
"perl distribution version",
"metacpan lookup",
"perl package dependents",
"latest version of a perl module"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "CPAN Perl distribution lookup - latest version, abstract, author, licence, runtime dependencies, downstream dependents and open issues from MetaCPAN"
}What the leaf hashes
{"body":"3df17512710af5f6af5d5c9b8370d54ca5cbd8be20215396c86d2531d42e1c28","id":120540,"kind":"listing","method":"baseline/1","observed_us":1793025618207422,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/registry/cpan/:dist","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).
- 0x0e624c1e61b68efe47b2a8de9d2991be7c85dae011159a12aec48f97af6c98c0
- 0xa8e43fdc4600d6f0ed7c24bec8681415e560b579e387ace79822cce9e2c338a7
- 0x15ff63f2bae811b8fe5ac72b3d131107595ad55257267423c5a261edb7241501
- 0x07c06f5bc2c0ba20950abd737474c7ccc41b2594adcc8518fc79aa3296a029fe
- 0x2734f2248154fc47a0ef328eae1fd20e269106192ada4d989a79a60f85e00c15
- 0x7a46acfa0ae958756f98f4bdc2b9765d7fc18968d158f06a362632dc4e7237ee
- 0x04ee90b533588c9879fc76c442d62919deb3ac1b6925c8f669bf4fa715c2bea7
- 0xd203a5359e9497778c5a5444354ae33ffe183fd7492f9e7de2671d89d2578f2b
- 0x29aa9bda43042865701ed0cc9fe05ec0d53aefe00b0bc25ef73772496ea16be6
- 0x36de94df31980769366d6459ea42b641bdc51120bfd8317d0101e69404feba8e
- 0x1e6a5f0042a4b7776e54cf79ce729b60eac17c4eb209cc9613fcd31c9fa0d26c
- 0x129649b2ec48fbc611fb055c3f5627bda42692beb65d09e853d75bcda4e06239
- 0x294f7935f78a896b5f246a7c9a7ee1b023720acdb03fff3cd549c63479848ec9
- 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
- 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae