Api Endpoint

Compound interest

Compute future value of a principal under compound interest. Returns future value, total interest earned, and the effective annual rate (APY) given the compounding frequency. Matches Excel's FV(rate, nper, 0, -principal) and the classic (1+r/n)^(nt) textbook formula.

Open interactive test console

Offering

Provider: agent402.tools
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Financial Analysis
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://agent402.tools/api/compound-interest
MIME type: application/json
First seen: 2026-10-16T01:50:53.972Z
Last seen: 2026-11-04T12:38:18.543Z
Tags: Data, Finance, interest, compound, future-value

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: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3: 0.002 USDC
Atomic price: 2000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 4: 0.002 USDC
Atomic price: 2000 · Network: eip155:143 · Asset: USDC · Scheme: exact
Payment option 5: 0.002 USDC
Atomic price: 2000 · Network: eip155:43114 · Asset: USDC · Scheme: exact
Payment option 6: 2000 atomic units
Atomic price: 2000 · Network: eip155:1329 · Asset: 0xe15fC38F6D8c56aF07bbCBe3BAf5708A2Bf42392 · Scheme: exact
Payment option 7: 0.003 USDC
Atomic price: 3000 · Network: eip155:10 · Asset: USDC · Scheme: exact
Payment option 8: 0.005 USDC
Atomic price: 5000 · Network: eip155:4663 · Asset: USDC · Scheme: exact
Payment option 9: 2000 atomic units
Atomic price: 2000 · Network: eip155:42220 · Asset: 0xcebA9300f2b948710d2653dD7B07f33A8B32118C · Scheme: exact
Payment option 10: 2000 atomic units
Atomic price: 2000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact
Payment option 11: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: upto
Payment option 12: 0.002 USDC
Atomic price: 2000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 13: 20000 atomic units
Atomic price: 20000 · Network: stellar:pubnet · Asset: CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75 · Scheme: exact
Payment option 14: 2000 atomic units
Atomic price: 2000 · Network: algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k · Asset: 31566704 · Scheme: exact
Payment option 15: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 16: 2000 atomic units
Atomic price: 2000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact

Raw x402 terms

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Observed health

Status: Healthy
Latest latency: 122 ms
Average latency: 758 ms
HTTP status: 204
Last checked: 2026-11-04T19:25:17.707Z
Reachability: 100% over 8 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": [
        "POST"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "properties": {
        "principal": {
          "type": "number",
          "description": "Starting amount (positive)"
        },
        "annualRate": {
          "type": "number",
          "description": "Annual interest rate as decimal (0.05 = 5%)"
        },
        "years": {
          "type": "number",
          "description": "Time horizon in years"
        },
        "compoundingPerYear": {
          "type": "number",
          "description": "Compounding periods per year (1 = annual, 12 = monthly, 365 = daily). Default 12."
        }
      },
      "required": [
        "principal",
        "annualRate",
        "years"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "futureValue": {
          "type": "number"
        },
        "totalInterest": {
          "type": "number"
        },
        "effectiveAnnualRate": {
          "type": "number"
        },
        "periods": {
          "type": "integer"
        }
      },
      "required": [
        "futureValue",
        "totalInterest",
        "effectiveAnnualRate",
        "periods"
      ]
    }
  },
  "required": [
    "type"
  ]
}