Realtor Mortgage Calculator API - Fixed, FHA and ARM Inputs

Provide homePrice and downPayment with string-valued interestRate, propertyTax and homeInsurance. Optional loanType selects documented fixed-rate, FHA or ARM choices; TWENTY_YEAR_FIX is the documented default. This route was not live-tested, so output fields, tax and insurance interpretation, loan-type effects and adjustable-rate behavior are unconfirmed. Do not mix its loanType codes with tools-mortgage-rates loanTerm codes. Validate cost units and each chosen financing method before display, and keep results illustrative rather than binding offers.

API Features

Documented financing-method codes loanType lists fixed-term, FHA and ARM request options without a verified calculation guarantee.

String-valued cost factors interestRate, propertyTax and homeInsurance preserve their documented string input types.

Price-and-contribution pairing homePrice and downPayment supply the required numeric property and cash inputs.

Calculator-versus-rate code separation These loanType codes differ from rate-search term codes and should not be interchanged.

Live API Demo

GET /api/project/realtor/tools-mortgage-calculator

API Response (JSON)

{}

curl -X GET 'https://api.opendata-api.com/api/project/realtor/tools-mortgage-calculator?key=<API_KEY>&homePrice=1988000&downPayment=397600&propertyTax=0.0125&homeInsurance=0.0055&interestRate=0.06332'

curl -X GET 'https://api.opendata-api.com/api/project/realtor/tools-mortgage-calculator?key=<API_KEY>&homePrice=1988000&downPayment=397600&propertyTax=0.0125&homeInsurance=0.0055&interestRate=0.06332'

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Need Help?

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

Use Cases

Evaluate fixed-term payment comparisons using a constant property price and explicit costs.
Test whether documented FHA and ARM options support a product's intended estimate behavior.
Build a financing-method selector only after validating each exposed calculation path.
Compare accepted tax and insurance scales with other mortgage routes before sharing form inputs.

Frequently asked questions

Which loan option is documented when loanType is omitted?

The documented default is TWENTY_YEAR_FIX, the twenty-year fixed option. This operation was not live-tested, so validate actual calculation assumptions.

Are FHA and ARM options guaranteed to be available loans?

No. Request options do not establish verified calculations, borrower eligibility, financial product availability or real loan offers.

Can I reuse rate-search loanTerm codes as calculator loanType?

No. These operations have different code systems. Use each documented value and independently validate tax, insurance and term assumptions.

Related operations

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