← The evidence ledger
Evidence row 469885
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agent402.tools/api/calc
- Recorded
- Previous row
- #452629
- Body SHA-256
- 7b3493907be282d76a0689c161668df1893a0e27a14dc8a3e13c6e9e9fc48e83
- Leaf
- 0x4fdcff3dda1427f5ac1e23e8952614ec2e78225a232092697c2b694ccbfe130f
What was observed
{
"endpoints": [
[
"x402",
"https://agent402.tools/api/calc"
]
],
"name": "Calculator",
"owner_address": "0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0",
"raw": {
"accepts": [
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"outputSchema": {
"properties": {
"result": {
"type": "integer"
}
},
"required": [
"result"
],
"type": "object"
},
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
"extra": {
"name": "USDC",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:143",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:43114",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0xe15fC38F6D8c56aF07bbCBe3BAf5708A2Bf42392",
"extra": {
"name": "USDC",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:1329",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "2000",
"asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:10",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "5000",
"asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
"extra": {
"name": "Global Dollar",
"version": "1"
},
"maxTimeoutSeconds": 300,
"network": "eip155:4663",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0xcebA9300f2b948710d2653dD7B07f33A8B32118C",
"extra": {
"name": "USDC",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42220",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "USDC",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:5042",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "permit2",
"facilitatorAddress": "0x14fDa13953Fc30428938E6BF950d036e77214e52",
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "upto"
},
{
"amount": "1000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75",
"extra": {
"areFeesSponsored": true
},
"maxTimeoutSeconds": 300,
"network": "stellar:pubnet",
"payTo": "GDNJXCKW7ZM7GEEVP674TWPU26YJNBQ2FI4ZIPRKTPTNUEJMDHFJWWRL",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "31566704",
"extra": {
"feePayer": "ZMFK2OI7ZBD2U27ISERZC4S6LKM6WMFJPZQ4MYNJDZ2VNBNMBA67RA22AA",
"tag": "x402-global-challenge"
},
"maxTimeoutSeconds": 300,
"network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
"payTo": "C7IIHG7SPLPZ5H7ZT6HW3UV2OQMQQE6Y2HBNGZXSLRJULE42BEE2OY2XIE",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "GatewayWalletBatched",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"version": "1"
},
"maxTimeoutSeconds": 604900,
"network": "eip155:8453",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
},
{
"amount": "1000",
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"version": "1"
},
"maxTimeoutSeconds": 604900,
"network": "eip155:5042",
"payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
"scheme": "exact"
}
],
"description": "Safely evaluate an arithmetic expression (+ - * / % ^ and parentheses). No code execution - a real parser, not eval.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"expr": "2 + 3 * (4 - 1) ^ 2"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"result": 29
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"expr": {
"type": "string"
}
},
"required": [
"expr"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"result": {
"type": "integer"
}
},
"required": [
"result"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "bc_b4aw4uzd"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1788138502/bazaar-icons/478aced8e219894c.png",
"lastUpdated": "2026-10-27T11:55:50.755Z",
"quality": {
"l30DaysTotalCalls": 9,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-27T04:18:38.753Z"
},
"resource": "https://agent402.tools/api/calc",
"serviceName": "Calculator",
"tags": [
"math",
"calc",
"expression",
"arithmetic",
"agents"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Safely evaluate an arithmetic expression (+ - * / % ^ and parentheses). No code execution - a real parser, not eval."
}What the leaf hashes
{"body":"7b3493907be282d76a0689c161668df1893a0e27a14dc8a3e13c6e9e9fc48e83","id":469885,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793104213035621,"prev":452629,"subject":"x402_bazaar:https://agent402.tools/api/calc","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (273461 rows).
- 0x4fdc991ed12d7b1f1486d456c7f41d98003723cff6fdfcad8413e751727a0f71
- 0x9b967c70c593be70cc9ff01a2f29956b22f698057536266e91db624bf67bfcdf
- 0xfa6fbb3a485afad50128fea3879797089b5f4edad5cdbbc48226f88601510e3c
- 0x5a67b75fe35effcfbdce947523953a17f5ed5c71c15e90d56eb2acf265c4d1df
- 0xeb8df77911bbd631d6d8bf94e655a32f3b828e58086accc529b40991f3be55ed
- 0xa9fa94c6ae0b08ba34aca9a5557ba448a6cc0c1313293780395f7a8ae614edb5
- 0x09ea3f3bbbafb188577188941dcb1d37aff3500f88d47730a761cb66e4de5037
- 0xd3a6feae4b7aa3dbb8b0336f4594f4bbe4152dd2a71faebedb6c90f0bd0dd147
- 0xb0906ce038d30ccc69a1f49538be8c971e660bf2e415ed9a404207cca31ebdae
- 0xf833df792e157e86b1fec470b40449423d669f06490afc7e934a9ce7929db11f
- 0x7b0f54aa0116cedb8afb80e7150869a7cf2b70adc313e0079a760b5d19d2efbc
- 0x8762ddf9a7f6b156629a8a66fe575b878ee44cd59a7f0a583ec6db0a152d703b
- 0x797da99476c7ebaa971607ae725e5e240b79de9e49d28859b94de107c850aaab
- 0x9ea0c6a53f80a30b6f13671109f98a000cf98e581875129f4be4b57131d06364
- 0xb78ea6a255dd06e2f402a1a733bca392fa6243920bcba95e8b80bdfc6ce5f553
- 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
- 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
- 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4