Present value of a future sum and/or a level annuity, given a per-period rate an
Present value of a future sum and/or a level annuity, given a per-period rate and number of periods. Set dueAtBeginning=true for an annuity-due.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
448 msmedian answer time
$0.004listed price per call
$0.004price 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
POST https://finance.openverbs.com/v1/present-value
| Category | Everything else |
|---|---|
| Provider host | finance.openverbs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 448 ms |
Example input (from the provider)
{
"body": {
"futureValue": 1,
"payment": 1,
"periods": 1,
"ratePercent": 1
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"dueAtBeginning": {
"description": "Annuity-due (payments at period start). Default false.",
"type": "boolean"
},
"futureValue": {
"description": "Future lump sum. Default 0.",
"type": "number"
},
"payment": {
"description": "Level payment per period (annuity). Default 0.",
"type": "number"
},
"periods": {
"description": "Number of periods.",
"maximum": 100000,
"minimum": 0,
"type": "integer"
},
"ratePercent": {
"description": "Discount rate per period, as a percentage.",
"maximum": 1000,
"minimum": -99,
"type": "number"
}
},
"required": [
"ratePercent",
"periods"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}