Finology.PublicApi

Keyless multi-plan federal loan calculator

Computes the first-year payment, lifetime cost, forgiveness and forgiveness tax for every federal repayment plan a borrower is eligible for, from the same verified engine as the paid API. No API key required. This free rung returns no verifiable answer id — the warranted, logged answer is the keyed /v1/projection and /v1/comparison surface.

post/v1/calculators/loan

Request

  • Base URL: https://api.finology.tech (the document declares no server; this is the origin it was published from)
  • URL: https://api.finology.tech/v1/calculators/loan
  • Auth: API key in header X-Api-Key

Request body

balancenumber double required
ratePctnumber double required
borrowerAginumber double required
filingStatusstring nullable
spouseAginumber double nullable
spouseFederalLoanBalancenumber double nullable
dependentsinteger
loanTypestring nullable
statestring nullable
pursuingPslfboolean
pslfCreditedMonthsinteger
priorIdrMonthsinteger
incomeGrowthPctnumber double
borrowedOnOrAfterJul12026boolean nullable

Response

OK

asOfstring nullable
lowestMonthlyPlanstring nullable
lowestLifetimeCostPlanstring nullable
computedBystring nullable
assumptionsstring[] nullable

Changes

No recorded changes to this operation across all 1 revision of this API.