API Help

Shipping and Label Generation

• Returns
• Surcharge Details in the Rate Response
• Using Carrier Account IDs When Rating
• Reducing API Response Times
• How to receive Residential or Commercial Specific Rates
• Shipping Label Sizes

See all 9 articles

Address Verification (AVS)

• Address Verification Overview & FAQs

International Shipping

• Customs & Shipping Internationally
• Tax Identifiers
• How To: Bill a Third-Party Account for Duties, Taxes, and Label Charges
• What is the difference between DDP, DAP, and DDU?
• Customs Data on International/Export Shipments

Miscellaneous

• Rate Limiting and API Reliability
• Paginating Lists via the API

Scan Forms

• Recovering from Manifest Failures

SmartRate

• SmartRate API FAQs

Tracking

• Understanding Trackers

Webhooks

• Webhook HMAC Validation