{"info":{"title":"Underscoredone","version":"1.0.0"},"openapi":"3.1.0","paths":{"/calculate":{"post":{"responses":{"200":{"description":"Successful response"},"402":{"description":"Payment Required"}},"x-payment-info":{"offers":[{"amount":"10000","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"Underscoredone: Calculate","intent":"charge","method":"evm","recipient":"0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08"}]},"summary":"Give this API a loan amount, an interest rate, and a repayment term, and it returns the exact monthly payment plus a full month-by-month schedule: interest paid, principal repaid, and balance remaining for every payment. Ask what an extra $300 a month, or a $10,000 lump sum in month 24, would do and it reports the months and interest saved. Every figure uses banker's rounding at pinned precision, "},"get":{"responses":{"200":{"description":"Successful response"},"402":{"description":"Payment Required"}},"x-payment-info":{"offers":[{"amount":"10000","currency":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"Underscoredone: Calculate","intent":"charge","method":"evm","recipient":"0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08"}]},"summary":"Give this API a loan amount, an interest rate, and a repayment term, and it returns the exact monthly payment plus a full month-by-month schedule: interest paid, principal repaid, and balance remaining for every payment. Ask what an extra $300 a month, or a $10,000 lump sum in month 24, would do and it reports the months and interest saved. Every figure uses banker's rounding at pinned precision, "}}},"x-service-info":{"description":"Underscoredone is an x402-native service at https://mortgage-amortization.underscoredone.com, indexed from the x402 Bazaar (Coinbase's public discovery directory). It charges callers itself in USDC on Base and is paid directly at its own wallet; Monex Protocol passes your request and payment headers through untouched. 1 endpoint listed."}}