Realtor Cash Down-Payment API - Fixed-Contribution Scenarios

Supply homePrice and downPaymentPrice with mortgageLoanType, interestRate, propertyTaxRate and homeInsurance. The documented downPaymentPrice input is a cash contribution rather than a percentage; source examples are scenario inputs, not API pricing. This route was not live-tested, so payment fields, loan-term interpretation, rate scale and insurance period are unconfirmed. Compare scenarios only after verifying all units and returned calculations, and describe the result as an estimate rather than a lender quote or personalized recommendation.

API Features

Cash contribution request downPaymentPrice specifies the documented fixed-amount contribution, distinct from downPaymentPercentage.

Home-price comparison basis homePrice can change while the cash contribution stays fixed to evaluate candidate-home scenarios.

Controlled remaining cost assumptions Explicit interest, tax, insurance and mortgageLoanType inputs make requested scenario differences identifiable.

Cash-scenario result verification The response contract and units remain unconfirmed; validate them before interpreting contribution effects.

Live API Demo

GET /api/project/realtor/property-calculate-down-payment-price

API Response (JSON)

{}

curl -X GET 'https://api.opendata-api.com/api/project/realtor/property-calculate-down-payment-price?key=<API_KEY>&homePrice=5450000&downPaymentPrice=1090000&interestRate=0.06577&propertyTaxRate=0.00865&mortgageLoanType=30&homeInsurance=1892'

curl -X GET 'https://api.opendata-api.com/api/project/realtor/property-calculate-down-payment-price?key=<API_KEY>&homePrice=5450000&downPaymentPrice=1090000&interestRate=0.06577&propertyTaxRate=0.00865&mortgageLoanType=30&homeInsurance=1892'

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Need Help?

If you encounter API issues or need other API requirements, please contact us.

Use Cases

Evaluate several candidate home prices for a buyer with a fixed cash contribution.
Test how an additional cash down payment changes a validated estimate with other inputs unchanged.
Compare fixed-amount and percentage contribution routes only after normalizing their accepted units.
Review estimate behavior near a selected contribution threshold without presenting personalized loan advice.

Frequently asked questions

Is downPaymentPrice a percentage?

No. The documented input represents a cash amount and is separate from downPaymentPercentage. Verify the amount unit and actual calculation behavior before adoption.

Can I compare home prices while keeping the down payment fixed?

That is a suitable evaluation scenario: hold downPaymentPrice and other assumptions constant while changing homePrice. This operation was not live-tested, so validate units and output first.

Can I directly compare this result with the percentage-based calculation?

First normalize down-payment, interest, tax and insurance units, then construct equivalent scenarios. Similar field names alone do not prove equivalent calculations.

Related operations

Guides

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Estimate Financing by Cash Down Payment