← The evidence ledger
Evidence row 63911
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-block
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 454b103bca1f5a1f529d26932193b769ef7a67412da3ccef395863b806de2f27
- Leaf
- 0x84ccd098fe13bcdfc18630684ca756f54b1c53e4febb3b3b18de5474b4b0c943
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/base-block"
]
],
"name": "agentshelf.syntexa.ch/v1/base-block",
"owner_address": "0x1d61faa032d3f40d9c470d2bf3a3f53de0e55a38",
"raw": {
"accepts": [
{
"amount": "2000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 60,
"network": "eip155:8453",
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"scheme": "exact"
}
],
"description": "Call when an agent needs a Base block header and transaction hashes by number or tag latest, finalized, or safe. The hash list is capped at 100. Read-only eth_getBlockByNumber. No spend. Send JSON {\"block\":\"latest\"}. Exact $0.002 USDC on Base. Try unpaid POST /v1/sandbox/base-block first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"block": "latest"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"base_fee_wei": "1000000000",
"billed": true,
"block": "latest",
"block_hash": "0xabababababababababababababababababababababababababababababababab",
"block_number": 100,
"gas_limit": "30000000",
"gas_used": "21000",
"miner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"network": "eip155:8453",
"ok": true,
"parent_hash": "0xabababababababababababababababababababababababababababababababab",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"timestamp": 1700000000,
"transaction_count": 1,
"transactions": [
"0xabababababababababababababababababababababababababababababababab"
],
"truncated": false,
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"block": "latest"
}
],
"properties": {
"block": {
"description": "Block number or tag latest, finalized, or safe. Example: latest. A JSON number such as 100 is accepted. Returns the header and at most 100 transaction hashes.",
"examples": [
"latest"
],
"type": "string"
}
},
"required": [
"block"
],
"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": [
{
"base_fee_wei": "1000000000",
"billed": true,
"block": "latest",
"block_hash": "0xabababababababababababababababababababababababababababababababab",
"block_number": 100,
"gas_limit": "30000000",
"gas_used": "21000",
"miner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"network": "eip155:8453",
"ok": true,
"parent_hash": "0xabababababababababababababababababababababababababababababababab",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"timestamp": 1700000000,
"transaction_count": 1,
"transactions": [
"0xabababababababababababababababababababababababababababababababab"
],
"truncated": false,
"warnings": []
}
],
"properties": {
"base_fee_wei": {
"examples": [
"1000000000"
],
"type": [
"string",
"null"
]
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"block": {
"examples": [
"latest"
],
"type": "string"
},
"block_hash": {
"examples": [
"0xabababababababababababababababababababababababababababababababab"
],
"type": "string"
},
"block_number": {
"examples": [
100
],
"minimum": 0,
"type": "integer"
},
"gas_limit": {
"examples": [
"30000000"
],
"type": "string"
},
"gas_used": {
"examples": [
"21000"
],
"type": "string"
},
"miner": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": [
"string",
"null"
]
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"parent_hash": {
"examples": [
"0xabababababababababababababababababababababababababababababababab"
],
"type": "string"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"timestamp": {
"examples": [
1700000000
],
"minimum": 0,
"type": "integer"
},
"transaction_count": {
"examples": [
1
],
"minimum": 0,
"type": "integer"
},
"transactions": {
"examples": [
[
"0xabababababababababababababababababababababababababababababababab"
]
],
"items": {
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"truncated": {
"examples": [
false
],
"type": "boolean"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"block",
"network",
"block_number",
"block_hash",
"parent_hash",
"timestamp",
"miner",
"gas_used",
"gas_limit",
"base_fee_wei",
"transaction_count",
"transactions",
"truncated"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-17T08:29:04.145Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-17T08:29:03.643Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/base-block",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs a Base block header and transaction hashes by number or tag latest, finalized, or safe. The hash list is capped at 100. Read-only eth_getBlockByNumber. No spend. Send JSON {\"block\":\"latest\"}. Exact $0.002 USDC on Base. Try unpaid POST /v1/sandbox/base-block first."
}What the leaf hashes
{"body":"454b103bca1f5a1f529d26932193b769ef7a67412da3ccef395863b806de2f27","id":63911,"kind":"listing","method":"baseline/1","observed_us":1793025455783798,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-block","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).
- 0x84cd60af66d13b559b2ace964d0100f508d71f57b700ac270db86321f38a6f95
- 0x1da4459876ad3ce0e0f5cf5e0b5604c7ecce9c37270153e3a4f0600dcb9e336f
- 0xad0b788d93cde9d1d6d799c3aa62efe25b1e38435881a759a2835b1375d4df08
- 0xf8cacb292f47759ef10ff8f8451fa02069ff9ae4d4f2166782e294e126d3e0e2
- 0x7429ae06646747aea4b85f984f98c5dab0f7b5e3ab4b24b79cbd0cefd6390576
- 0x2872dbeb4967fb92b97ea63e66777ca0fc4af1b2adfa754df111f7d3e86965da
- 0x5f97fbd6e0c557aef7ac22a111eeb0a4f606a02b2b10450d985c56d73f51c63d
- 0x0e176001aa4ea75011e88c9023cd88528b97832d7702bb4eb6ce54dacb72285f
- 0xca94b2eb4dbd39705fde6c0afe784886166d172e034b96706e6f73452b52855c
- 0x885deb0e4307fa99df9e773ff11344ee034f4c9c93d7eb138d0da714c1f8128b
- 0x147021357b2eb773d60db74f751316bfd367b06080320d378c0c402240e98d59
- 0x146f43471a3bde6d8a04e87b6afd3ee6860c6e38a009f86aee705ce722b67748
- 0x91c2ae93ec20c7fed5088112fe3941ca622dfb3f8f1022c4844726c361244bd4
- 0x0eff463856b0992d53ab7d8c0b97c71541413358bdd445710c1e4b6aeb4d8f78
- 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae