Address ValidationAddress Validation API

Validate Addresses Before You Ship

Reduce failed deliveries by verifying and normalizing addresses before label purchase.

Overview

Address validation helps catch incomplete or incorrect ship-to details early — especially valuable for USPS and residential destinations.

USPS CASS standardization
Residential vs commercial detection
International validation rules
Batch CSV validation

Capabilities

Search validation capabilities and jump into Rates or Labels next.

USPS CASS standardization

Normalize US addresses to improve deliverability before you buy a label.

Open API reference

Residential vs commercial

Surcharges

Detect destination type so rates and surcharges stay accurate.

Rates API

International rules

Global

Apply country-specific validation before cross-border shipments.

Rates API

Batch CSV validation

Bulk

Validate address lists in bulk when migrating catalogs or warehouses.

Example request

Example validate request shape for a US destination.

http

POST /api/v1/addresses/validate
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "street1": "1600 Amphitheatre Parkway",
  "city": "Mountain View",
  "state": "CA",
  "postalCode": "94043",
  "country": "US"
}

Next steps

After addresses look clean, shop rates and purchase labels with confidence.

Rates API Labels API Quickstart

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