← The evidence ledger
Evidence row 63916
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-erc20-allowance
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- da6bb77c013873aac9669dc41d703d492fba9945d5f16246bd5ef69ae2a2c87d
- Leaf
- 0x69d8e7a0b92d87beda215e58320699308975db0b2146c706c4d99f62d33764e0
What was observed
{
"endpoints": [
[
"x402",
"https://agentshelf.syntexa.ch/v1/base-erc20-allowance"
]
],
"name": "agentshelf.syntexa.ch/v1/base-erc20-allowance",
"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 ERC-20 allowance(owner, spender) on Base, raw and human when decimals() is readable. Send token, owner, and spender. Read-only. No spend. Send JSON {\"token\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"owner\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\",\"spender\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"}. Exact $0.002 USDC on Base. Try unpaid POST /v1/sandbox/base-erc20-allowance first.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"spender": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"allowance": "1",
"allowance_raw": "1000000",
"billed": true,
"decimals": 6,
"network": "eip155:8453",
"ok": true,
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"spender": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"spender": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"properties": {
"owner": {
"description": "Token holder who granted the allowance. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. EIP-55 or all one case.",
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"spender": {
"description": "Account allowed to spend the tokens. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. EIP-55 or all one case.",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"token": {
"description": "ERC-20 contract on Base. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Circle USDC). allowance(owner, spender) is read-only.",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
}
},
"required": [
"token",
"owner",
"spender"
],
"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": [
{
"allowance": "1",
"allowance_raw": "1000000",
"billed": true,
"decimals": 6,
"network": "eip155:8453",
"ok": true,
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"spender": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"warnings": []
}
],
"properties": {
"allowance": {
"examples": [
"1"
],
"type": [
"string",
"null"
]
},
"allowance_raw": {
"examples": [
"1000000"
],
"type": "string"
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"decimals": {
"anyOf": [
{
"minimum": 0,
"type": "integer"
},
{
"type": "null"
}
],
"examples": [
6
]
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"owner": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"spender": {
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"token": {
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"ok",
"receipt_id",
"billed",
"network",
"token",
"owner",
"spender",
"decimals",
"allowance_raw",
"allowance"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-17T08:29:10.874Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-17T08:29:10.692Z"
},
"resource": "https://agentshelf.syntexa.ch/v1/base-erc20-allowance",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Call when an agent needs ERC-20 allowance(owner, spender) on Base, raw and human when decimals() is readable. Send token, owner, and spender. Read-only. No spend. Send JSON {\"token\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"owner\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\",\"spender\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"}. Exact $0.002 USDC on Base. Try unpaid POST /v1/sandbox/base-erc20-allowance first."
}What the leaf hashes
{"body":"da6bb77c013873aac9669dc41d703d492fba9945d5f16246bd5ef69ae2a2c87d","id":63916,"kind":"listing","method":"baseline/1","observed_us":1793025455792728,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-erc20-allowance","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).
- 0x69d86aeeb7aa4abbdeff65277b764905b0cb88bc120bea9c66d3c84180350496
- 0x7554679aca1ec621b00d0e8104887387807074d873f848dd63e694be9cc0fb7d
- 0x54b36d847c9efee4c183ec64d381a7dd9f30a71bdf3d15ad2cc3e4cd2ce6763f
- 0x6470685f98d90f9867961dbca53c6a9e4a1644539b011ea47b1a32ebfe30bfbd
- 0xca95693e9a8ac6bd1bfa84b9569f0a59dbb38cefbe1e0d63e0daca9cdb5eb89b
- 0x6d4135b8fe75c246295dd7362d121717701ed62b637494f00c54f9b9aadc8c13
- 0x0c1b1c56b55c20639e4f1df8a0603377ada45c3bbf22555ea4150946fb8aa6dd
- 0x08841e8f51d399a3c5cdcecaa159251aac354f7facd8c1e73414a0c6c05f439a
- 0x4b281468dc6cd08d8bc2f252c8603bf868c6f0f6f98ea5b97921e8f450056db0
- 0xdeb16a4852b1c249628d0590c012fe1adebc9195ddf46ba3cbf8dcba07af7c93
- 0xe8b20383a9232d45872f50d7c4c484b3ffe756328a5a1e2d63218cd46b95695c
- 0x9483a0a7a066ffc2fb890c8f34dbc91bf373e546e4a3800b76064288b3cc4875
- 0x5f350d70c252ff1169c0210fd45fce1b0ab8d7316f048741a9e90a6c8cb65dcf
- 0x9a79c65e077cd9da9d436b3ade6f5ddc0d244510c4d5903ef2f02d81205f7666
- 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
- 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae