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APIs enable integration with other applications.

  • Developers can utilize our REST APIs to integrate services with their own software.
  • Automate the preparation of Certified Mail® cover sheets and labels – complete with electronic postage.
  • APIs let you pull delivery information – Proof of Acceptance (Electronic), Proof of Delivery (Electronic), and Return Receipt (Electronic) – directly into other applications.
Certified Mail APIs from

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No setup or monthly fees. No software to install. Perfect for office or home.
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