Address Verification API

Improve overall deliverability by up to 62% with our CASS certified Address Verification. Get instant access to our fully-covered US Address Verification, and our fast-growing International Address Verification.

Free with Shipping

If you sign up for our Shipping API, you also get full access to our Domestic Address Verification API for free.

Full Domestic Coverage

We can verify any U.S. address to the unit level, and flag addresses as residential or commercial.

Best International Coverage

We can verify addresses in any country as part of the largest AVS coverage network in the market.

Start Verifying Addresses in Minutes

We aggregate worldwide data from best-in-class providers to create a comprehensive international network. It learns over time, continuously improving delivery accuracy to ensure your packages are going to the right place.

100+ Carriers. Billions of Shipments.

  • USPS Domestic
  • USPS International
  • USPS Returns
  • USPS Cubic
  • USPS Tracking
  • UPS Domestic
  • UPS International
  • UPS Mail Innovations
  • UPS Tracking
  • FedEx Domestic
  • FedEx International
  • FedEx SmartPostĀ®
  • FedEx Returns
  • FedEx Tracking
DHL Express
DHL Express
  • DHL Express Domestic
  • DHL Express Worldwide
  • DHL Express Tracking