Shipping APIs: How to Connect Your Business System to Transportation and Delivery Providers
Altexsoft
SEPTEMBER 8, 2021
USPS is the cheapest and is usually the carrier of choice for small businesses that handle lightweight shipments. Their APIs require two-factor authentication for security. APIs can be protected by either API keys, OAuth2, JWT, Certificates, or HTTP basic authentication. for authentication and authorization. FedEx APIs.
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