US Postal Service has APIs

John Musser, December 7th, 2005

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It turns-out that the US Postal Service has its own set of web APIs (and has had some of them for nearly three years). They offer five types of APIs: Address Information, Delivery Information, Rate Calculators, Shipping Labels, and Carrier Pickup. The programming model is a custom XML over HTTP approach. The API documentation is reasonably good yet has a certain ‘governmental office’ feel to it.

Thanks to an anonymous poster yesterday for adding this and there’s now 125 APIs in the database.