developers.usps.com

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Obtain USPS OAuth 2.0 access tokens via the new APIs platform and replace Basic Auth-based integrations ahead of the legacy API sunset
6 steps · 3 gotchas · unrated
Request a shipping rate from the USPS Domestic Labels v3 API and purchase a label with dual-token authentication
5 steps · 3 gotchas · unrated
Use the USPS Addresses v3 API to standardize and validate a US address and look up ZIP+4
5 steps · 3 gotchas · unrated
Validate and standardize US addresses using the USPS APIs v3
6 steps · 3 gotchas · unrated
Generate USPS returns labels via the USPS APIs v3 platform
6 steps · 3 gotchas · unrated
Validate a US address and calculate domestic postage rates using the USPS APIs v3 platform
6 steps · 3 gotchas · unrated
Use the USPS Tracking API v3 to retrieve package events and set up proactive tracking
6 steps · 3 gotchas · unrated
Generate and transmit a USPS SCAN form (end-of-day manifest) to induct multiple packages at once
6 steps · 3 gotchas · unrated