← The evidence ledger
Evidence row 2201890
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://finance-calculators.x402tookit.com/loan-payment
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4bb8aed4cdc6530dfc0293b15960eeec795ede9252ea95335c52d25b7f17dabb
- Leaf
- 0x8351f3f2161fd55f33fbe520af3e974bea12fc8d8b30d2bcdf026922b63246db
What was observed
{
"endpoints": [
[
"x402",
"https://finance-calculators.x402tookit.com/loan-payment"
]
],
"name": "Finance Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Loan payment, total interest and amortization preview from principal, annual rate and term, monthly or other frequency.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"annual_rate_pct": 6,
"payments_per_year": 12,
"principal": 200000,
"years": 30
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T03:59:14.737Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"firstAndLastPayments": [
{
"balance": 199800.9,
"interest": 1000,
"payment": 1,
"principal": 199.1
},
{
"balance": 199600.8,
"interest": 999,
"payment": 2,
"principal": 200.1
}
],
"interestAsPctOfPrincipal": 115.84,
"notChecked": [
"fees, insurance, taxes",
"variable or adjustable rates",
"…1 more"
],
"payment": 1199.1,
"payments": 360,
"reasons": [
"Standard fully amortizing loan with interest compounding each payment period."
],
"source": "computed locally",
"summary": "$1,199.10 per payment for 360 payments; total paid $431,676.38, of which interest $231,676.38 (115.8% of the amount borrowed).",
"totalInterest": 231676.38,
"totalPaid": 431676.38,
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"annual_rate_pct": {
"description": "Annual interest rate in percent, e.g. 6.5",
"type": "number"
},
"payments_per_year": {
"description": "Default 12",
"type": "integer"
},
"principal": {
"description": "Amount borrowed",
"type": "number"
},
"years": {
"description": "Term in years",
"type": "number"
}
},
"required": [
"principal",
"annual_rate_pct",
"years"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"firstAndLastPayments": {
"items": {
"properties": {
"balance": {
"type": [
"null",
"number"
]
},
"interest": {
"type": [
"null",
"number"
]
},
"payment": {
"type": [
"null",
"number"
]
},
"principal": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"interestAsPctOfPrincipal": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"payment": {
"type": [
"null",
"number"
]
},
"payments": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalInterest": {
"type": [
"null",
"number"
]
},
"totalPaid": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:54:34.811Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:54:34.552Z"
},
"resource": "https://finance-calculators.x402tookit.com/loan-payment",
"serviceName": "Finance Calculators",
"tags": [
"loan",
"mortgage",
"amortization"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Loan payment, total interest and amortization preview from principal, annual rate and term, monthly or other frequency."
}What the leaf hashes
{"body":"4bb8aed4cdc6530dfc0293b15960eeec795ede9252ea95335c52d25b7f17dabb","id":2201890,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810062549,"prev":null,"subject":"x402_bazaar:https://finance-calculators.x402tookit.com/loan-payment","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- 0x334a1e5d5a361a119862fdfb5a21c860fca61a2b4607e54f1a8431719990b363
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- 0xbbf83a5abce02cab566afa2f7ecba564643fbbf8409acce5528b2849e7df33e0
- 0x8b05302c8559b3679f6588c82396822898ad0ee1beffac2d9c26a9d44aa5a4c8
- 0x97c23095592517484baa0cce6fbbe96349b3dba8e45286e1446afb305ed67deb
- 0x25ee4fee29cd46ab0928ea998eada29b9daa7683fa080bcfc75fc3191df5d503
- 0x05f43d396b8947ced671d4b5f0bd512218cb7f6925bd412fc373223a7bfc4c85
- 0xb6bab28aac8201a73142c5dd2acf156b93d7f2cffdff682f5daba7e9b110655f
- 0x8a86ac563161489ff6b032a83c9abb8348ff47d52c0a1c3af9cb2637ffd25c9d
- 0x9236ce44089e10e350435c01e569b60f72046bb5112e06356a17b8f3c0a940ee
- 0xf82dc9b9d8e081f36e55e80fab45654768c11eb158257f63f8ca7ff17d181d54
- 0x5d40473873ebe898bcca4e49df524bf4345695f06abe3579f4bdb7b306b863f8
- 0x46991481c678139203ebc3c532867ce1643c09ddc33966c4fb48bb7f033ab22f
- 0x3b89dd05634a82075204d3c671f613081ddfd9df739c64c0a8f39081bdfa32c7
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af