Start free. Prove the integration.
Prove the USPS integration with validation, address extract, ZIP+4, guided recovery, and rate shopping before you buy. Upgrade in place when you're ready for tracking, intelligence, batch validation, and BYOK.
What you unlock from here
The free API key is the proof surface. Paid plans unlock protected workflows and higher-volume operations without changing the core API shape.
- Address validation + extract
- ZIP+4 + city/state lookup
- Domestic + international rate shopping
- Service standards, shipping options, and locations
Try every validation and rate endpoint with live USPS responses. No API key required.
- Package tracking
- Batch validation + checkout widget
- Dashboard + BYOK
- Pickup scheduling
Paid endpoints unlock after signup. Flat monthly pricing.
- Increased throughput
- Enterprise onboarding
- Custom integrations
Contact us when volume or licensing needs exceed standard tiers.
Free proof path includes
Need protected workflows, higher limits, or enterprise onboarding? See paid plans →
Your free API key is ready.
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Free API Key
Try it now
curl "https://api.revaddress.com/api/address/validate?streetAddress=1600+Pennsylvania+Ave+NW&city=Washington&state=DC&ZIPCode=20500" \
-H "X-API-Key: YOUR_KEY"
# Need unit recovery? Add secondaryAddress and re-run with the same base address.
curl "https://api.revaddress.com/api/address/validate?streetAddress=1600+Pennsylvania+Ave+NW&secondaryAddress=Suite+100&city=Washington&state=DC&ZIPCode=20500" \
-H "X-API-Key: YOUR_KEY"
Public examples use a neutral landmark fixture. When USPS finds the building but needs a unit, keep the base address and add secondaryAddress.
Unlock intelligence scoring, fraud_risk (6 weighted signals), batch validation (50 / call), Checkout Guard widget, and Logistics Complexity Index — all same API shape.
The same trust score you saw on /try-it, plus checkout.risk_detected webhooks at ≥ 0.60.
Save this key securely — paste it into the dashboard to manage your account and expand into tracking, intelligence, batch validation, and BYOK when you are ready.