← The evidence ledger
Evidence row 63914
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-contract-info
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 7a4b60ada38a296f29d1e6322959875e3b1f2fae39b6d5e1c735574394edfde8
- Leaf
- 0xd8157d976b74067edfd36df9898f94a1a20a1043b769ff8eb24ea0af548e95e0
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/base-contract-info"
]
],
"name": "agentshelf.syntexa.ch/v1/base-contract-info",
"owner_address": "0x1d61faa032d3f40d9c470d2bf3a3f53de0e55a38",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 60,
"network": "eip155:8453",
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"scheme": "exact"
}
],
"description": "Call when an agent needs is_contract, bytecode size and hash, EIP-1967 proxy implementation, and owner() for one Base address. owner_renounced is true for the zero address or the dead address. An EOA is is_contract false. Read-only. Send JSON {\"address\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"}. Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/base-contract-info first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"beacon": null,
"billed": true,
"bytecode_bytes": 2,
"bytecode_hash": "0x1111111111111111111111111111111111111111111111111111111111111111",
"implementation": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"is_contract": true,
"network": "eip155:8453",
"ok": true,
"owner": "0x0000000000000000000000000000000000000000",
"owner_renounced": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"upgradeable_proxy": true,
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"properties": {
"address": {
"description": "Account on Base mainnet. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Returns is_contract, bytecode size and hash, EIP-1967 implementation, and owner() when present. An EOA is is_contract false.",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
}
},
"required": [
"address"
],
"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": [
{
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"beacon": null,
"billed": true,
"bytecode_bytes": 2,
"bytecode_hash": "0x1111111111111111111111111111111111111111111111111111111111111111",
"implementation": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"is_contract": true,
"network": "eip155:8453",
"ok": true,
"owner": "0x0000000000000000000000000000000000000000",
"owner_renounced": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"upgradeable_proxy": true,
"warnings": []
}
],
"properties": {
"address": {
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"beacon": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"bytecode_bytes": {
"examples": [
2
],
"minimum": 0,
"type": "integer"
},
"bytecode_hash": {
"examples": [
"0x1111111111111111111111111111111111111111111111111111111111111111"
],
"type": [
"string",
"null"
]
},
"implementation": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": [
"string",
"null"
]
},
"is_contract": {
"examples": [
true
],
"type": "boolean"
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"owner": {
"examples": [
"0x0000000000000000000000000000000000000000"
],
"type": [
"string",
"null"
]
},
"owner_renounced": {
"examples": [
true
],
"type": [
"boolean",
"null"
]
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"upgradeable_proxy": {
"examples": [
true
],
"type": "boolean"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"address",
"network",
"is_contract",
"bytecode_bytes",
"bytecode_hash",
"upgradeable_proxy",
"implementation",
"beacon",
"owner",
"owner_renounced"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-11T10:14:21.56Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-11T10:14:21.344Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/base-contract-info",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs is_contract, bytecode size and hash, EIP-1967 proxy implementation, and owner() for one Base address. owner_renounced is true for the zero address or the dead address. An EOA is is_contract false. Read-only. Send JSON {\"address\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"}. Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/base-contract-info first."
}What the leaf hashes
{"body":"7a4b60ada38a296f29d1e6322959875e3b1f2fae39b6d5e1c735574394edfde8","id":63914,"kind":"listing","method":"baseline/1","observed_us":1793025455788922,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-contract-info","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).
- 0xd81585929252182c83375560e6ac4c4850f64d1935fa06026554e182ef4efe30
- 0xf282690ff29c2685443b19d2b69e59599e53da069e0eb1a49254931b0a342763
- 0xe994387e11ee20b738af7656256f6664bc0b71f5c8b768e0dcf7c2f40a9eaa7e
- 0x60ce39a4d46f59229bb854a8329871cd528b3658442ff376d57e7525f2dd3dd9
- 0x86d372d6e8dc5a7ec8f1f7b00352bde08b904464d150cc31db60f476c383c786
- 0x098d9a31acf9d2068dd6342e8753be3a61b160cb02577e4a3f710493ca452a6e
- 0xe85536ddd1636b228fb27dd22e5b567abf20702bd1d705e6dc0c1b634a40c700
- 0x6fc319aee47cefc01cabc11411e55a4d1b1ee94fd3d7dea23084ff2f42855749
- 0x38edea85675b956ad8aaf124db8618d5f6690216f1fca67580d264407be0db98
- 0x99d243e75489137f42f22b35cac536858bfa54cac8df9dedbb78852b9f686a91
- 0x2671a86f48dece064e871ca46396549de6c07bd09915bed27b7ac95a735127fd
- 0x07e91966e8a0c43a0725bd3d523259064a93333c2900e6171b69ffbfd9f423f1
- 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
- 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
- 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
- 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae