Letter Printing and Mailing API

Integrate direct mail into your business platform and get all of the benefits of automated letter printing and mailing. Save time, money, and energy that would otherwise be spent looking for trustworthy printers, standing outside a post office, or manually folding your letter into an envelope and then getting it sealed, labeled, and stamped before submitting to the postal service.



Our print and mail API automates everything from start to finish for your transactional, compliance, or marketing letters so that you can focus on your core business. Your letters will be printed at trusted printers near your recipients’ destinations to cut down on shipping costs, and mailed by USPS or FedEx for a fast delivery.

Your letter will be printed on quality 24 - 64 lb paper that is thick and attractive-looking. We also offer options to send Certified Mail or to include a return receipt in your letter for additional cost. You can select either option in your letter creation request by adding the value certified_return_receipt to the extra_services parameter. Note that Certified Mail pieces will receive different tracking events compared to First Class and Standard Mail.

Personalized letters and postcards are effective in connecting with customers and prospects. The personalization features of our API make it easy to create eye-catching letters that will drive results for your business. You can choose from a variety of templates to include dynamic data in your letters and postcards, and we provide options for custom envelopes with windows that allow you to show off your brand and deliver your message effectively.

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