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GET /v1/payment

Monthly payment

Try it live

10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/loan-api

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Code snippets

curl "https://api.oanor.com/loan-api/v1/payment" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/loan-api/v1/payment", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/loan-api/v1/payment");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/loan-api/v1/payment",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "note": "Fully-amortizing fixed-rate loan: M = P·r·(1+r)ⁿ / ((1+r)ⁿ − 1), r = annual rate / 12.",
        "inputs": {
            "payments": 360,
            "principal": 200000,
            "annual_rate_pct": 6
        },
        "total_paid": 431676.38,
        "total_interest": 231676.38,
        "monthly_payment": 1199.1,
        "interest_fraction": 0.53669,
        "number_of_payments": 360
    },
    "meta": {
        "timestamp": "2026-06-04T18:38:08.944Z",
        "request_id": "30dd0143-84aa-4cb1-b7a0-33f9a8a8699c"
    },
    "status": "ok",
    "message": "Monthly payment",
    "success": true
}