US ZipCode
Maps & Location · Operational · 30d uptime 100%
Address Verification for USPS & International Addresses. Try our easy-to-use APIs, list processing tools and more.
Trust signals
Pricing
FREEMIUM
Auth
API_KEY
CORS
Yes
Rate limit
Free tier available
Health
211ms
Trust score
97 (A)
Last checked Sep 4, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Excellent production-readiness signals.
Links
- Homepagewww.smarty.com
- Documentationwww.smarty.com/docs/cloud/us-zipcode-api
- Base URLwww.smarty.com/docs/cloud/us-zipcode-api
Integration checklist
- Auth is API_KEY
- CORS enabled — callable directly from browsers.
- Rate limit: Free tier available