Postmaster API - Libraries
Postmaster is a modern, RESTful API for shipping packages on the web. Ship through multiple vendors (UPS, Fedex, and USPS). Track packages and get event callbacks on exceptions. Validate addresses and schedule pickups.

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Libraries (6)
The following is a list of libraries from ProgrammableWeb's Library Directory that matched your search term. Although there many different interpretations of the word "library" among software developers, ProgrammableWeb adheres to a specific definition so as to clearly distinguish libraries from SDKs and frameworks in a way that will facilitate clean search results. In ProgrammableWeb's parlance, the term "library" is strictly used to describe a platform-specific software tool that, when installed, results in the provisioning a specific API. Conversely, SDKs are exclusively for consuming APIs and Frameworks are agnostic to specific APIs. If you think a library, SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.
Title | Description | |
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![]() | Postmaster API node.js Library | This client library is a node.js Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |
![]() | Postmaster API .Net Library | This client library is a .Net / C# Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |
![]() | Postmaster API Java Library | This client library is a Java Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |
![]() | Postmaster API Ruby Library | This client library is a Ruby Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |
![]() | Postmaster API PHP Library | This client library is a PHP Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |
![]() | Postmaster API Python Library | This client library is a Python Library for the Postmaster API. The Postmaster API is a platform that helps developers integrate parcel shipping into applications or websites. Postmaster supports domestic and international shipping. |