Free — no signup needed
Check any US address
Verified against the official USPS database. Get the standardized address, ZIP+4, deliverability status, and guided next steps when USPS needs more information.
USPS standardized address
ZIP+4
Deliverable
Type
Vacant
Raw API response
Now run this same check in your code
One curl, same endpoint, your API key. Under 60 seconds.
curl "https://api.revaddress.com/api/address/validate?streetAddress=...&city=...&state=...&ZIPCode=..." \
-H "X-API-Key: $REVADDRESS_KEY" 1,000 validations/mo free · no credit card · batch validation + intelligence on Growth
Next steps
API Reference
Integrate validation into your app or checkout flow.
Batch Validation
Validate 50 addresses per call on Growth plans.
USPS Web Tools Shutdown
Why the old USPS API stopped working.
Powered by the official USPS v3 REST API. Free tier: 1,000 validations/month. See plans for higher limits.