Api Endpoint

SiteCheck

Loan and investment calculator in exact cents, no outside source. mode=annuity: monthly payment, total interest and the full amortisation schedule (up to 600 months). mode=compound: future value of an initial sum plus monthly contributions. mode=npv or irr: discount or internal rate of return of a list of cashflows (up to 200, the first at time 0). Rates are percentages from 0 to 100 a year (per period for npv and irr); terms up to 50 years.

Open interactive test console

Offering

Provider: api.sitecheck-api.workers.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Financial Analysis
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.sitecheck-api.workers.dev/api/finance/loan
MIME type: application/json
First seen: 2026-10-16T01:51:02.144Z
Last seen: 2026-11-05T00:37:57.235Z
Tags: loan calculator, mortgage, amortization, monthly payment, compound interest, npv, irr, savings calculator

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.002 USDC
Atomic price: 2000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3: 2000 atomic units
Atomic price: 2000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact
Payment option 4: 0.002 USDC
Atomic price: 2000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 5: 0.002 USDC
Atomic price: 2000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 6: 0.002 USDC
Atomic price: 2000 · Network: eip155:143 · Asset: USDC · Scheme: exact
Payment option 7: 0.002 USDC
Atomic price: 2000 · Network: eip155:480 · Asset: USDC · Scheme: exact
Payment option 8: 0.002 USDC
Atomic price: 2000 · Network: eip155:10 · Asset: USDC · Scheme: exact
Payment option 9: 2000 atomic units
Atomic price: 2000 · Network: eip155:42220 · Asset: 0xcebA9300f2b948710d2653dD7B07f33A8B32118C · Scheme: exact
Payment option 10: 20000 atomic units
Atomic price: 20000 · Network: stellar:pubnet · Asset: CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75 · Scheme: exact
Payment option 11: 1532 atomic units
Atomic price: 1532 · Network: xrpl:0 · Asset: XRP · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "payTo": "J8vnmBx4pS1X7UUBTfz1yWBKiw69Dj2yRGRHDaXBRdhR"
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:143",
    "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:10",
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "eip155:42220",
    "asset": "0xcebA9300f2b948710d2653dD7B07f33A8B32118C",
    "amount": "2000",
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA"
  },
  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "asset": "CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75",
    "amount": "20000",
    "payTo": "GBIX2M7HNL2G2VYU5KZ446OSN55ZWHS3WBEUP4JTLS6R34VXIGTDOAFI"
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "asset": "XRP",
    "amount": "1532",
    "payTo": "rDxNZCDfLxUzeMWGGwsY3sjQT8eoZCf8UJ"
  }
]

Observed health

Status: Healthy
Latest latency: 96 ms
Average latency: 1115 ms
HTTP status: 402
Last checked: 2026-11-05T00:37:57.228Z
Reachability: 100% over 12 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "mode": {
          "type": "string",
          "description": "annuity (default), compound, npv or irr"
        },
        "principal": {
          "type": "string",
          "description": "Loan amount (annuity) or starting sum (compound), up to two decimals (optional for compound)"
        },
        "rate": {
          "type": "string",
          "description": "Annual rate in percent, 0 to 100 (annuity, compound); rate per period in percent for npv (-99 to 1000)"
        },
        "termYears": {
          "type": "string",
          "description": "Term in years, up to 50 (annuity, compound)"
        },
        "termMonths": {
          "type": "string",
          "description": "Term in months, 1 to 600, instead of termYears"
        },
        "contribution": {
          "type": "string",
          "description": "Monthly contribution for compound, up to two decimals (optional)"
        },
        "cashflows": {
          "type": "string",
          "description": "Comma-separated cashflows for npv and irr, e.g. -1000,300,400,500 (first at time 0)"
        }
      },
      "required": [
        "mode"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "cashflows": {
              "description": "Comma-separated cashflows for npv and irr, e.g. -1000,300,400,500 (first at time 0)",
              "type": "string"
            },
            "contribution": {
              "description": "Monthly contribution for compound, up to two decimals (optional)",
              "type": "string"
            },
            "mode": {
              "description": "annuity (default), compound, npv or irr",
              "type": "string"
            },
            "principal": {
              "description": "Loan amount (annuity) or starting sum (compound), up to two decimals (optional for compound)",
              "type": "string"
            },
            "rate": {
              "description": "Annual rate in percent, 0 to 100 (annuity, compound); rate per period in percent for npv (-99 to 1000)",
              "type": "string"
            },
            "termMonths": {
              "description": "Term in months, 1 to 600, instead of termYears",
              "type": "string"
            },
            "termYears": {
              "description": "Term in years, up to 50 (annuity, compound)",
              "type": "string"
            }
          },
          "required": [
            "mode"
          ],
          "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"
}