![]() Contact the Internet Customer Care Center with the following information: For access to more secure APIs, like Label Printing, you’ll need additional permissions. You’ll then have access to the most popular APIs. Once registered, you’ll receive an email with your assigned Web Tools User ID. ![]() Get access to our Web Tools through a simple registration process. USPS Web Tools are ecommerce application program interfaces (APIs) that can be used for online stores or customer service centers-free of charge. Try the Domestic Rate API below or jump into the technical documentation and start developing.
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