Skip to main content
EasyPost is a shipping API that abstracts the complexity of multiple carriers (USPS, UPS, FedEx, and more) behind a single integration. Droplinked uses it within the ShippingModule for:
  • Address verification
  • Parcel creation
  • Shipment creation and rate retrieval
  • Purchasing shipping labels
  • Tracking shipments

​
Configuration

EASY_POST_API_KEY is sensitive and stored server-side only. Never expose it to the client.

​
Client initialization

The EasyPostShippingService initializes the client in its constructor using the @easypost/api library:

​
Reference docs

​
API surface

​
Address creation

Fields sent:
  • street1, street2
  • city, state, zip
  • country
  • company, phone, email

​
Shipment creation

Fields sent:
  • to_address — destination address ID
  • from_address — origin address ID
  • parcel — parcel ID
  • customs_info — required for international shipments (contents type, etc.)
Returned:
  • id — shipment ID
  • rates[] — array of available rates, each with id, carrier, service, rate, delivery_days

​
Buying a shipment

Fields sent:
  • shipment_id — the shipment to buy
  • rate — { id: rate_id }, the specific rate selected
Returned:
  • tracking_code — tracking number
  • postage_label — URL to the shipping label image (PNG/PDF)
  • status — current status (pre_transit, in_transit, delivered, …)

​
What we store

​
Flow diagram

​
Security notes

1

API key protection

EASY_POST_API_KEY is server-only and stored in your secrets manager. Never inlined in client code or build output.
2

Address verification

EasyPost address verification runs before buying labels — reduces failed deliveries.

​
Troubleshooting