← The evidence ledger
Evidence row 64121
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://agentstoolshub.com/api/v1/finance/amortization-schedule
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 1a747c986fc8b1511b17d56a6810fad5a6cb69665541c24703a0036751433db4
- Leaf
- 0x09710e32d6278d62216273bb39545c95581ba56dc85d3e8437557e5d2333cdf0
What was observed
{
"endpoints": [
[
"x402",
"https://agentstoolshub.com/api/v1/finance/amortization-schedule"
]
],
"name": "AgentsToolsHub",
"owner_address": "0x8a0f2b0a6c82d1c54b16e2e4decd18ff0802b0f6",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x8a0F2b0a6C82D1c54B16E2e4DEcd18fF0802b0f6",
"scheme": "exact"
}
],
"description": "Full loan amortization: the exact monthly payment, a year-by-year principal/interest/balance table, total interest, and the effect of extra monthly payments — payoff months saved and interest saved. Deterministic mortgage math agents can quote line by line. Use this when an agent needs to full yearly schedule + extra-payment savings.",
"extensions": {
"analytics": {},
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"annualRate": 4.5,
"principal": 300000,
"years": 30
},
"type": "http"
},
"output": {
"example": {
"result": {
"answer": "1,520.06/mo · paid off in 360 months (30.0 yrs)",
"answerLabel": "300,000 @ 4.5% / 30y",
"details": [
{
"label": "Monthly payment (P&I)",
"value": "1,520.06"
},
{
"label": "Total interest",
"value": "247,220.13"
},
{
"label": "Total paid",
"value": "547,220.13"
}
],
"steps": [
"Payment = P·i/(1−(1+i)^−n) with i = 0.003750, n = 360 → 1,520.06",
"Simulated 360 months"
],
"table": {
"columns": [
"Year",
"Principal paid",
"Interest paid",
"Balance"
],
"rows": [
[
1,
"4,839.68",
"13,400.99",
"295,160.32"
],
[
2,
"5,062.01",
"13,178.66",
"290,098.31"
],
[
3,
"5,294.56",
"12,946.11",
"284,803.74"
],
[
4,
"5,537.79",
"12,702.88",
"279,265.95"
],
[
5,
"5,792.2",
"12,448.47",
"273,473.75"
],
[
6,
"6,058.29",
"12,182.38",
"267,415.46"
],
[
7,
"6,336.61",
"11,904.06",
"261,078.85"
],
[
8,
"6,627.71",
"11,612.96",
"254,451.14"
],
[
9,
"6,932.19",
"11,308.48",
"247,518.95"
],
[
10,
"7,250.65",
"10,990.02",
"240,268.3"
],
[
11,
"7,583.74",
"10,656.93",
"232,684.56"
],
[
12,
"7,932.14",
"10,308.53",
"224,752.42"
],
[
13,
"8,296.54",
"9,944.13",
"216,455.88"
],
[
14,
"8,677.68",
"9,562.99",
"207,778.2"
],
[
15,
"9,076.33",
"9,164.34",
"198,701.86"
],
[
16,
"9,493.3",
"8,747.37",
"189,208.57"
],
[
17,
"9,929.42",
"8,311.25",
"179,279.15"
],
[
18,
"10,385.57",
"7,855.1",
"168,893.57"
],
[
19,
"10,862.69",
"7,377.98",
"158,030.89"
],
[
20,
"11,361.72",
"6,878.95",
"146,669.17"
],
[
21,
"11,883.67",
"6,357",
"134,785.5"
],
[
22,
"12,429.61",
"5,811.07",
"122,355.89"
],
[
23,
"13,000.62",
"5,240.05",
"109,355.27"
],
[
24,
"13,597.87",
"4,642.81",
"95,757.41"
],
[
25,
"14,222.55",
"4,018.12",
"81,534.86"
],
[
26,
"14,875.93",
"3,364.74",
"66,658.93"
],
[
27,
"15,559.33",
"2,681.34",
"51,099.6"
],
[
28,
"16,274.12",
"1,966.55",
"34,825.48"
],
[
29,
"17,021.75",
"1,218.92",
"17,803.73"
],
[
30,
"17,803.73",
"436.94",
"0"
]
]
},
"value": 1520.055929
},
"tool": "amortization-schedule"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"annualRate": {
"description": "Annual rate (%)",
"type": "number"
},
"extraMonthly": {
"description": "Extra monthly payment",
"type": "number"
},
"principal": {
"description": "Loan amount",
"type": "number"
},
"years": {
"description": "Term (years)",
"type": "number"
}
},
"required": [
"principal",
"annualRate",
"years"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-19T20:36:55.975Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-19T20:36:55.846Z"
},
"resource": "https://agentstoolshub.com/api/v1/finance/amortization-schedule",
"serviceName": "AgentsToolsHub",
"tags": [
"finance"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Full loan amortization: the exact monthly payment, a year-by-year principal/interest/balance table, total interest, and the effect of extra monthly payments — payoff months saved and interest saved. Deterministic mortgage math agents can quote line by line. Use this when an agent needs to full yearly schedule + extra-payment savings."
}What the leaf hashes
{"body":"1a747c986fc8b1511b17d56a6810fad5a6cb69665541c24703a0036751433db4","id":64121,"kind":"listing","method":"baseline/1","observed_us":1793025456070307,"prev":null,"subject":"x402_bazaar:https://agentstoolshub.com/api/v1/finance/amortization-schedule","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).
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- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae