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USPS API Manager

Everything you could possibly need for addressing and shipping.

The USPS API Manager simplifies the complexities of addressing including Address Validation, City/State Lookup, and ZIP Code Lookup. Shipping APIs coming soon. Get started now or read on to learn more.

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Database Contains Business, Residential & Post Office Box

The United States Postal Service maintains a database of 160 million mailing addresses in the United States.

Automate Data Entry

City/State Lookup API returns the city and state corresponding to the given ZIP Code™.

Address Validation
& Standardization

Ensure that your addresses are deliverable and everything you send arrives at the right place, at the right time.

[{ 
  "input_index": "0", 
  "address2": "240 MARKET ST", 
  "city": "BLOOMSBURG", 
  "state": "PA", 
  "zip5": "17815", 
  "zip4": "1770", 
  "deliveryPoint": "99", 
  "carrierRoute": "C003", 
  "footnotes": "H", 
  "dpvConfirmation": "D", 
  "dpvcmra": "N", 
  "dpvFootnotes": "AAN1", 
  "business": "N", 
  "centralDeliveryPoint": "N", 
  "vacant": "N", 
  "returnText": "Default address: The address you entered was found but more information is needed (such as an apartment, suite, or box number) to match to a specific address." }]

The Address Validation/Standardization API corrects errors in street addresses, including abbreviations and missing information, and supplies ZIP Codes™ and ZIP+4® Codes.

City/State Lookup API returns the city and state corresponding to the given ZIP Code™.

The ZIP Code Lookup API, which returns the ZIP Code™ and ZIP+4® Code corresponding to the given address, city, and state.

All Addressing APIs support up to five lookups per transaction.

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Our APIs

Feature 1

Address Validation/Standardization

The Address Validation/Standardization “Verify” API, which corrects errors in street addresses, including abbreviations and missing information, and supplies ZIP Codes™ and ZIP+4® Codes.

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Feature 2

City/State Lookup

City/State Lookup API returns the city and state corresponding to the given ZIP Code™.

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Feature 3

ZIP Code Lookup

The ZIP Code Lookup API, which returns the ZIP Code™ and ZIP+4® Code corresponding to the given address, city, and state (use USPS state abbreviations).

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Coming Soon

Shipping APIs are coming soon! Including price calculator, label creation, tracking and delivery information.