1-888-501-5288 Login / Signup
LetterStream
Menu
LetterStream Provider of Critical Mail Services

LetterStream API

At LetterStream, we've got a little problem... we like building cool things!

If you're reading this, it probably means that you're a software developer and you know just what were talking about! We also like to share our cool tools with others so if any of the following sound familiar, you're in the right place.

  • I have an existing website/application in which myself or my clients need the ability to send postal mail easily.
  • I already collect payment from my clients.
  • I produce and or have electronic access to the documents that I or my clients want to mail.
  • Further, I have access to the sender/recipient data that accompanies those documents.
  • I am, or have a qualified software developer who can modify my code to sucessfully implement a web-based API.

If this sounds like your situation, Signup Now!

Want some more perspective? Read about us in CIO Review

Partnership Benefits

With a LetterStream API Partnership you can quickly and easily provide your customers with access to our highly automated mail processing services. Your customers can quickly and easily send postcards, first-class letters (in both #10 and large flat envelopes) and certfied postal mail. All of this without ever leaving your software. To your users it can be as simple as clicking a button.

How It Works

  1. Signup Now!
  2. Validate Your email address
  3. Speak to one of our API specialists
  4. Download and read our API documents
  5. Write some code (examples provided!)
  6. Thrill your customers by providing them such a great service!

CIO Review 20 Most Promising APIS