
Simple Client Onboarding and Verification

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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

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| Website | stackgo.io | postaldatapi.com |
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| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
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PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
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PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
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