← The evidence ledger
Evidence row 63968
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/eth-nft-owner
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4ebd16c716de5eddef0442cb4b06095cf5e56462505f1cfb2f910ca39721a97c
- Leaf
- 0x59bfeaba2307f3896b3a795313ff4ffec1ceaeab684480897c8d08eab171def1
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/eth-nft-owner"
]
],
"name": "agentshelf.syntexa.ch/v1/eth-nft-owner",
"owner_address": "0x1d61faa032d3f40d9c470d2bf3a3f53de0e55a38",
"raw": {
"accepts": [
{
"amount": "3000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 60,
"network": "eip155:8453",
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"scheme": "exact"
}
],
"description": "Call when an agent needs the ERC-721 owner of token_id on an Ethereum contract, or an ERC-1155 balanceOf(owner, id) when standard is erc1155. A missing token errors. Read-only. No spend. Send JSON {\"contract\":\"0x1111111111111111111111111111111111111111\",\"token_id\":\"1\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/eth-nft-owner first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"contract": "0x1111111111111111111111111111111111111111",
"token_id": "1"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"balance": null,
"billed": true,
"contract": "0x1111111111111111111111111111111111111111",
"network": "eip155:1",
"ok": true,
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"standard": "erc721",
"supports_erc1155": null,
"supports_erc721": true,
"token_id": "1",
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"contract": "0x1111111111111111111111111111111111111111",
"token_id": "1"
}
],
"properties": {
"contract": {
"description": "NFT contract on Ethereum mainnet. Example: 0x1111111111111111111111111111111111111111. ownerOf or balanceOf is read-only.",
"examples": [
"0x1111111111111111111111111111111111111111"
],
"type": "string"
},
"owner": {
"description": "Account for ERC-1155 balanceOf(owner, token_id). Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. Required when standard is erc1155.",
"type": "string"
},
"standard": {
"default": "erc721",
"description": "Token standard. erc721 (default) uses ownerOf or tokenURI. erc1155 uses balanceOf(owner, id) or uri(id) with {id} substitution.",
"enum": [
"erc721",
"erc1155"
],
"type": "string"
},
"token_id": {
"description": "Token id as a decimal integer. Example: 1. A JSON number is accepted when it is a safe integer. A missing ERC-721 token errors.",
"examples": [
"1"
],
"pattern": "^(0|[1-9]\\d*)$",
"type": "string"
}
},
"required": [
"contract",
"token_id"
],
"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": {
"additionalProperties": false,
"examples": [
{
"balance": null,
"billed": true,
"contract": "0x1111111111111111111111111111111111111111",
"network": "eip155:1",
"ok": true,
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"standard": "erc721",
"supports_erc1155": null,
"supports_erc721": true,
"token_id": "1",
"warnings": []
}
],
"properties": {
"balance": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"contract": {
"examples": [
"0x1111111111111111111111111111111111111111"
],
"type": "string"
},
"network": {
"const": "eip155:1",
"examples": [
"eip155:1"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"owner": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"standard": {
"enum": [
"erc721",
"erc1155"
],
"examples": [
"erc721"
],
"type": "string"
},
"supports_erc1155": {
"examples": [
null
],
"type": [
"boolean",
"null"
]
},
"supports_erc721": {
"examples": [
true
],
"type": [
"boolean",
"null"
]
},
"token_id": {
"examples": [
"1"
],
"type": "string"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"network",
"contract",
"token_id",
"standard",
"owner",
"balance",
"supports_erc721",
"supports_erc1155"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-20T07:39:11.195Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-20T07:39:10.805Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/eth-nft-owner",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs the ERC-721 owner of token_id on an Ethereum contract, or an ERC-1155 balanceOf(owner, id) when standard is erc1155. A missing token errors. Read-only. No spend. Send JSON {\"contract\":\"0x1111111111111111111111111111111111111111\",\"token_id\":\"1\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/eth-nft-owner first."
}What the leaf hashes
{"body":"4ebd16c716de5eddef0442cb4b06095cf5e56462505f1cfb2f910ca39721a97c","id":63968,"kind":"listing","method":"baseline/1","observed_us":1793025455881549,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/eth-nft-owner","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).
- 0x59bff748a1a84e6a85a45d3189a95ef7845d84d1345c60fad27cfb473a983184
- 0x52ae8ac495e5090ed0e3c8bf2f918e51333b3170be2eab078706c5e78db666c2
- 0x1738d70b79e958f24ced29b1033bf05c073518e71e325ae3118f2a0066eaf0f4
- 0x2706289d162fbe7ba38094266d6ba5687fb8c75ce4afbe6cb9a7a6758a1fd753
- 0x122aa800f00fada4fabb13e9b990351b184190996de2ff403f1132c3e9885841
- 0xcd6cea867bfcdb1b694900656cbaebe76e345e5efe9092845b88b61d7ef3f534
- 0xa0aa67c7bd40c1c0f4de684beb68c391b02cb6320391c5099253626a82c040ee
- 0x38943124942d8428380e4d121c872e70e8723046c88ccf0fe22f451d0bf69410
- 0x9fe2b5bb49c3c1c0cfb9a7e2175505abb418851419201d4ff747b61a8778232a
- 0x109a3cbe67d20751c1bafc45b08ecc03404d3cc4decd7b239de884bc7e6340d6
- 0x3ada80dcde3daf850269166ea2ab667084c23fe8ab3b3994664b930470ebdef7
- 0xf522fa92d4115c2b18b96aa43119f8df9b4e96c92f5d6449d0fe96dcd4bf324c
- 0xc8abb13c711b67d9f1ef145286ed450a0f5566f054a4b290ea3d711873bcbe20
- 0x5cdeb4648502e0633d01cc4f3379d48cccb9d4f528565b2868eb93db0df9e829
- 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
- 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae