WooCommerce Shipping Method Development

Before writing code

Fetch live docs:

1. Web-search site:developer.woocommerce.com shipping method api for shipping method guide
2. Web-search woocommerce custom shipping method tutorial for implementation patterns
3. Fetch https://woocommerce.github.io/code-reference/classes/WC-Shipping-Method.html for class reference

Shipping Architecture

Shipping Zones

Geographic regions that determine available shipping methods:

• Zone = set of geographic rules (countries, states, postcodes)
• Each zone has one or more shipping methods assigned
• "Locations not covered by your other zones" = default catch-all zone
• Zones are evaluated in order — first match wins