Realtor Postal Code Lookup API - Location to ZIP Context

Provide location as a supported address or place value; the documented finance-tool workflow obtains it from tools-auto-complete. This postal-code route was not live-tested, and no postal-code fields, multiplicity or matching rules were confirmed. Inspect the response before choosing a ZIP for rate requests, especially for cities with many ZIP codes. Treat it as geographic context lookup rather than authoritative postal-delivery validation.

API Features

Location-to-postal request The documented input is a location value rather than a property_id or an already-required postalCode.

Finance-location handoff Use a verified tool-compatible location instead of assuming property autocomplete IDs are accepted.

Multi-ZIP ambiguity review City-level inputs can be ambiguous; actual returned cardinality and matching must be checked.

Geographic not delivery validation No response was observed and this route does not establish authoritative mail-deliverability checks.

Live API Demo

GET /api/project/realtor/tools-get-postal-code

API Response (JSON)

{}

curl -X GET 'https://api.opendata-api.com/api/project/realtor/tools-get-postal-code?key=<API_KEY>&location=New+York%2C+NY'

curl -X GET 'https://api.opendata-api.com/api/project/realtor/tools-get-postal-code?key=<API_KEY>&location=New+York%2C+NY'

📢

Need Help?

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

Use Cases

Evaluate geographic ZIP context for a mortgage-rate workflow starting from a selected location.
Review ambiguous city-level matches before choosing a single postal code for financial research.
Check location inputs in an imported housing-research list without claiming delivery verification.
Test whether returned postal context aligns with a separately known property address.

Frequently asked questions

Does a city always resolve to one ZIP code?

No such guarantee was verified. Response count and matching rules are unconfirmed, especially for multi-ZIP cities. Inspect actual results instead of automatically choosing one code.

Where should the location input come from?

The documented financing workflow begins with tools-auto-complete, but its actual return format also needs validation. Do not assume property-search location IDs are compatible.

Can this lookup verify that an address receives mail?

No. Geographic postal context does not establish authoritative address or postal-deliverability validation.

Related operations

Guides

View Subscription Plans →

Look Up Postal-Code Context from a Location