← The evidence ledger
Evidence row 118622
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/capRateCalculator
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- acb201b0e46ae3a4a1f4d7eb1e5f7e7166636c32170a6f3824d944de09fe9c3d
- Leaf
- 0x014dbc03230e2bf9782e014bce8d4bcffef69a8f38cf2d829f476cf99c6ea3ad
What was observed
{
"endpoints": [
[
"x402",
"https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/capRateCalculator"
]
],
"name": "Sindri",
"owner_address": "0x548efd4f4d4a5c3669dbb4cbb2b1a637feeec5f6",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "APer2AbhckyMWyJanW2MZ2eRLcpL9Lmhks8rkmXfqjRG",
"scheme": "exact"
}
],
"description": "Cap rate calculator for real estate investing. Runs a full multi-year deal analysis (per-category rent/expense growth, a sale scenario, IRR) and headlines the capitalization rate: first-year NOI divided by purchase price.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"annualInsurance": 0,
"annualMaintenance": 0,
"annualPropertyTaxes": 0,
"closingCosts": 0,
"downPaymentPercent": 0.2,
"hoaAnnualIncrease": 0,
"holdingLengthYears": 2,
"insuranceAnnualIncrease": 0,
"interestRate": 0,
"loanTermYears": 10,
"maintenanceAnnualIncrease": 0,
"monthlyHOA": 0,
"monthlyRent": 2000,
"otherAnnualExpenses": 0,
"otherAnnualIncrease": 0,
"propertyManagementFeeRate": 0,
"purchasePrice": 200000,
"rehabCosts": 0,
"rentAnnualIncrease": 0,
"saleExpensesRate": 0,
"salePrice": 200000,
"taxesAnnualIncrease": 0,
"vacancyRate": 0
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"data": {
"firstYear": {
"NOI": 24000,
"capRate": 0.12,
"cashFlow": 8000,
"cashOnCashReturn": 0.2
},
"investedCash": 40000,
"irr": 0.5177,
"monthlyMortgagePayment": 1333.33,
"params": {
"annualInsurance": 0,
"annualMaintenance": 0,
"annualPropertyTaxes": 0,
"closingCosts": 0,
"downPaymentPercent": 0.2,
"hoaAnnualIncrease": 0,
"holdingLengthYears": 2,
"insuranceAnnualIncrease": 0,
"interestRate": 0,
"loanTermYears": 10,
"maintenanceAnnualIncrease": 0,
"monthlyHOA": 0,
"monthlyRent": 2000,
"otherAnnualExpenses": 0,
"otherAnnualIncrease": 0,
"propertyManagementFeeRate": 0,
"purchasePrice": 200000,
"rehabCosts": 0,
"rentAnnualIncrease": 0,
"saleExpensesRate": 0,
"salePrice": 200000,
"taxesAnnualIncrease": 0,
"vacancyRate": 0
},
"sale": {
"impliedAnnualGrowthRate": 0,
"netProceeds": 72000,
"totalProfitAfterSale": 48000
},
"totals": {
"NOI": 48000,
"expenses": 0,
"mortgagePayments": 32000,
"operatingCashFlow": 16000,
"rentalIncome": 48000
},
"yearByYear": [
{
"NOI": 24000,
"annualCashFlow": 8000,
"annualCoCReturn": 0.2,
"annualExpenses": 0,
"annualIncome": 24000,
"annualMortgagePayment": 16000,
"interestPortion": 0,
"loanBalance": 144000,
"principalPortion": 16000,
"totalEquity": 56000,
"year": 1
}
]
},
"ok": true
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"annualInsurance": {
"description": "Annual landlord insurance in the first year.",
"type": "number"
},
"annualMaintenance": {
"description": "Annual maintenance budget in the first year.",
"type": "number"
},
"annualPropertyTaxes": {
"description": "Annual property taxes in the first year.",
"type": "number"
},
"closingCosts": {
"default": 0,
"description": "Closing costs. Default 0.",
"type": "number"
},
"downPaymentPercent": {
"description": "Down payment as a fraction of purchase price (0-1). Use 1 for an all-cash purchase.",
"type": "number"
},
"hoaAnnualIncrease": {
"default": 0.03,
"description": "Annual HOA fee growth rate, as a fraction. Default 0.03.",
"type": "number"
},
"holdingLengthYears": {
"description": "Number of years you plan to hold the property before selling (1-50).",
"type": "number"
},
"insuranceAnnualIncrease": {
"default": 0.03,
"description": "Annual insurance growth rate, as a fraction. Default 0.03.",
"type": "number"
},
"interestRate": {
"description": "Annual mortgage interest rate, as a fraction. Ignored if downPaymentPercent is 1.",
"type": "number"
},
"loanTermYears": {
"description": "Loan term in years (1-50). Ignored if downPaymentPercent is 1.",
"type": "number"
},
"maintenanceAnnualIncrease": {
"default": 0.03,
"description": "Annual maintenance cost growth rate, as a fraction. Default 0.03.",
"type": "number"
},
"monthlyHOA": {
"default": 0,
"description": "Monthly HOA fee. Default 0.",
"type": "number"
},
"monthlyRent": {
"description": "Total monthly rent collected, before vacancy/management fee.",
"type": "number"
},
"otherAnnualExpenses": {
"default": 0,
"description": "Other annual operating expenses in the first year. Default 0.",
"type": "number"
},
"otherAnnualIncrease": {
"default": 0.03,
"description": "Annual growth rate for other expenses, as a fraction. Default 0.03.",
"type": "number"
},
"propertyManagementFeeRate": {
"default": 0.1,
"description": "Property management fee, as a fraction of gross rent (0-1). Default 0.10.",
"type": "number"
},
"purchasePrice": {
"description": "Property purchase price.",
"type": "number"
},
"rehabCosts": {
"default": 0,
"description": "Upfront rehab/improvement costs. Default 0.",
"type": "number"
},
"rentAnnualIncrease": {
"default": 0.03,
"description": "Annual rent growth rate, as a fraction. Default 0.03.",
"type": "number"
},
"saleExpensesRate": {
"default": 0.09,
"description": "Sale costs (agent commission, closing costs, etc.), as a fraction of sale price (0-1). Default 0.09.",
"type": "number"
},
"salePrice": {
"description": "Expected sale price at the end of the holding period.",
"type": "number"
},
"taxesAnnualIncrease": {
"default": 0.03,
"description": "Annual property tax growth rate, as a fraction. Default 0.03.",
"type": "number"
},
"vacancyRate": {
"default": 0.08,
"description": "Expected vacancy rate, as a fraction (0-1). Default 0.08.",
"type": "number"
}
},
"required": [
"purchasePrice",
"downPaymentPercent",
"interestRate",
"loanTermYears",
"monthlyRent",
"annualPropertyTaxes",
"annualInsurance",
"annualMaintenance",
"salePrice",
"holdingLengthYears"
],
"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": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "x402_api_vendor",
"s": [
"cdp_sdk_server"
]
},
"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"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {}
},
"lastUpdated": "2026-10-19T11:23:27.73Z",
"quality": {
"l30DaysTotalCalls": 4,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-19T11:23:27.585Z"
},
"resource": "https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/capRateCalculator",
"serviceName": "Sindri",
"tags": [
"cap rate calculator",
"real estate investing",
"rental property"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Cap rate calculator for real estate investing. Runs a full multi-year deal analysis (per-category rent/expense growth, a sale scenario, IRR) and headlines the capitalization rate: first-year NOI divided by purchase price."
}What the leaf hashes
{"body":"acb201b0e46ae3a4a1f4d7eb1e5f7e7166636c32170a6f3824d944de09fe9c3d","id":118622,"kind":"listing","method":"baseline/1","observed_us":1793025613526218,"prev":null,"subject":"x402_bazaar:https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/capRateCalculator","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).
- 0x014dae0b35c074467bebdcf82adc9a7f851cbb0cfb89c85bb8398492a149f556
- 0x358675c513df6a7596e20318255c9960795df03811148f925d95e663ce685575
- 0x85e1f056ba3e495421343cdd194037f1b4fc7e7caa5175e4ee4da41a37dddb60
- 0xfc32290e1e7e358ad94f2a3be6b18a1be395beb0d5a0c5af8cbd3df09f062004
- 0x4531d5b166e86527dc88bbe1782a0f177117c3ac623dfec7321387bdb3542b7a
- 0x8040e01e4ab66843c785ad94d670ddad99222bee589702fb9ca0893fe2ac41ef
- 0x06fbaec86adc965121892940363c422da17ab33725efda0e1b80afa05fb440c8
- 0x1806017ff3aefdc69b6e37eb8ccfca27d7568ceba4d2dd067055383bed5e229a
- 0x6f9f32f8dee03dc8a2b7a23278fac64d4b56353e3c998aa67f6d60cb88715fcd
- 0x85169a6117e10c7135af42ad727319d6b57941ee86aa8669f8bb9b75982421cf
- 0xdbc41a9a60a4504b5d2eaf9b4bdc4f7e216ca3dfaa1fe4bcdd27541133e12a2d
- 0x9d52e830c7a3480876eca1592c3b5c4a56ee3a8c6fdd4e37c57710b7654e36c7
- 0x92ff7d176556ddbe3d885e2ab73948b14a6aa3568a8fd237427d4f8415235a23
- 0xd1d3499072edb10edc68f84bcae2365d2ab534df689250cab18c751b6f13b6ff
- 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae