Exact finance maths
Exact finance maths: loan repayment and total interest, compound growth with regular contributions, NPV and IRR of cash flows, and ROI with annualised return.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
24 msmedian answer time
$0.002listed price per call
$0.002price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://manylives.me/paid/calc/finance
| Category | Everything else |
|---|---|
| Provider host | manylives.me |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.002 | 24 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"op": "loan",
"principal": "400000",
"rate": "6",
"years": "30"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"method": {
"const": "GET",
"type": "string"
},
"queryParams": {
"properties": {
"contribution": {
"description": "compound: added each period",
"type": "string"
},
"cost": {
"description": "roi: amount invested",
"type": "string"
},
"flows": {
"description": "npv/irr: comma-separated cash flows, first is usually negative",
"type": "string"
},
"op": {
"description": "loan, compound, npv, irr or roi (required)",
"examples": [
"loan"
],
"type": "string"
},
"payments_per_year": {
"description": "loan: default 12",
"type": "string"
},
"periods_per_year": {
"description": "compound: default 12",
"type": "string"
},
"principal": {
"description": "loan/compound: starting amount",
"examples": [
"400000"
],
"type": "string"
},
"rate": {
"description": "annual rate in percent (loan, compound, npv)",
"examples": [
"6"
],
"type": "string"
},
"value": {
"description": "roi: final value",
"type": "string"
},
"years": {
"description": "loan/compound/roi: years",
"examples": [
"30"
],
"type": "string"
}
},
"required": [
"op"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}