Connect with USPS Using Java and EasyPost

Using Java to Integrate with USPS?

You can't do it through USPS. They use SOAP/XML for their endpoints with absolutely no client libraries or documentation to support you, but you can use Easypost to connect to USPS today using Java.

With EasyPost's USPS Java API, you can:

  • Print labels at the industry's lowest price
  • Track every outbound (or inbound) package
  • Verify every address, domestic or international
  • Shop for rates across your shipping accounts
  • Automate package insurance with low premiums
package shipments;

import com.easypost.exception.EasyPostException;
import com.easypost.model.Shipment;
import com.easypost.model.Parcel;
import com.easypost.service.EasyPostClient;

import java.util.HashMap;

public class Buy {
    public static void main(String[] args) throws EasyPostException {
        EasyPostClient client = new EasyPostClient(System.getenv("EASYPOST_API_KEY"));
        Parcel parcel = client.parcel.create(new HashMap<string, object>() {
                put("predefined_package", "Parcel");
                put("weight", 28);

        Shipment shipment = client.shipment.create(new HashMap<string, object>() {
                put("to_address", toAddress);
                put("from_address", fromAddress);
                put("parcel", parcel);
        });, shipment.lowestRate());

Tracking Packages

Track packages across all major carriers.

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Address Verification

Validate domestic and international addresses.

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International & Customs

Learn how to handle international shipping seamlessly.

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Shipping Insurance

Shipping insurance for all items sent with EasyPost.

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Leading companies rely on EasyPost


QALO uses EasyPost's API to automate their returns for an unbeatable customer experience.


With EasyPost's API, Expedited Passports & Visas cut their operational load in half.


Casper sped up their European launch thanks to EasyPost's support of over 30+ European carriers.

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Connect to EasyPost Today

Sign up and start shipping in the same day with our Java Library. If you have any questions, or if you want to talk logistics, feel free to reach out to one of our shipping experts.