← The evidence ledger
Evidence row 63910
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-balance
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 3ce96bcc8887c6e8e93d947c1028dcb5bdf081b41fa3727467e1a1a3218a2fa7
- Leaf
- 0x8b2af54cea4dbdfb8d39d20ca322db172b3b8640cd4d9b4173d60c1f4a3e5b1c
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/base-balance"
]
],
"name": "agentshelf.syntexa.ch/v1/base-balance",
"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 Base mainnet ETH and USDC balances, tx_count, and a rough x402 affordability hint for one address. Send address as EIP-55 or all-lowercase 0x. Read-only eth_getBalance and USDC balanceOf on eip155:8453. No private key and no spend. Send JSON {\"address\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-balance first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"billed": true,
"eth": "1",
"eth_wei": "1000000000000000000",
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"tx_count": 42,
"usdc": "2.5",
"usdc_atomic": "2500000",
"usdc_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"warnings": [],
"x402_hint": "USDC balance covers about 1250 payments of $0.002 or 250 of $0.01 on Base."
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
],
"properties": {
"address": {
"description": "EVM address on Base mainnet (eip155:8453). Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. EIP-55 checksum or all one case. Returns eth_wei, eth, usdc_atomic, usdc, tx_count, and x402_hint. Read-only. No private key.",
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"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": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"billed": true,
"eth": "1",
"eth_wei": "1000000000000000000",
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"tx_count": 42,
"usdc": "2.5",
"usdc_atomic": "2500000",
"usdc_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"warnings": [],
"x402_hint": "USDC balance covers about 1250 payments of $0.002 or 250 of $0.01 on Base."
}
],
"properties": {
"address": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"eth": {
"examples": [
"1"
],
"type": "string"
},
"eth_wei": {
"examples": [
"1000000000000000000"
],
"type": "string"
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"tx_count": {
"examples": [
42
],
"minimum": 0,
"type": "integer"
},
"usdc": {
"examples": [
"2.5"
],
"type": "string"
},
"usdc_atomic": {
"examples": [
"2500000"
],
"type": "string"
},
"usdc_contract": {
"const": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
},
"x402_hint": {
"examples": [
"USDC balance covers about 1250 payments of $0.002 or 250 of $0.01 on Base."
],
"type": "string"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"address",
"network",
"eth_wei",
"eth",
"usdc_contract",
"usdc_atomic",
"usdc",
"tx_count",
"x402_hint"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-11T10:13:59.941Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-11T10:13:59.462Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/base-balance",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs Base mainnet ETH and USDC balances, tx_count, and a rough x402 affordability hint for one address. Send address as EIP-55 or all-lowercase 0x. Read-only eth_getBalance and USDC balanceOf on eip155:8453. No private key and no spend. Send JSON {\"address\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-balance first."
}What the leaf hashes
{"body":"3ce96bcc8887c6e8e93d947c1028dcb5bdf081b41fa3727467e1a1a3218a2fa7","id":63910,"kind":"listing","method":"baseline/1","observed_us":1793025455782096,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-balance","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).
- 0x8b2b1f5341c87b3bc87f0c2393c8c2ac7d958b8a0109796422ff605999c1dee0
- 0x666fb4e487e31984f604455a5f3db6789361cb9b0fea5b836a72c8f477ffeb2c
- 0x66bb3852713d40d5fa8cfa104adc54090d3d2393dfd8a01b0afebc5918f7a7d4
- 0x872dd697b09312946090ac82328eead4e9c386530fbf4a1cef21482c97f85219
- 0x32da789adb4a15283a3de419e61eb6a4b631d78ac687de01a08fc57249ba3818
- 0x89aae21ed0294f764fe4b648ea4adc2f2249d95ff3740bbe962c746f59afb71a
- 0xb83c12c2bb2a3718cf0bf5338d21e4d9073d4bd90aa697313e3c53012fc277cb
- 0x29dfc76639bdd608de1da37aa51ef19a82f23e884bfa3bcbc31248d798cddff7
- 0x0fffe292d9960e31d06d8fce508362f1d4f4450d619eba8241c8efa6d94710d9
- 0x7d19a8f0d44d0c224dd4e1fd540ac67cd3370e926b73e965b2beb37e5ab9936b
- 0x7d887da17795602ff54a7a2d145692904e47f8d3ab035b8db85d274d00bc9bfe
- 0x8cb11bf3bc7d3a6f859c170a167821024ffc4758cdfd2cc96f61a3291aefb637
- 0xd5ec7ffaecac790d8adfa0620b0a5494758f862e3090b49e556a6ecbad2f0782
- 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
- 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae