API for Direct Mail and Printing

Our APIs make sending your customer’s direct mail postcards and print ship orders fast and easy.

QuantumDigital’s APIs make navigating the USPS, national consumer lists, uploading your own designs or lists, and shipping small order marketing materials and postcards a breeze. Our APIs not only automate these processes but also provide you with an affordable low-cost per-piece pricing model.

Fast Turnaround

We provide next-business-day turnaround for all orders.

Your Designs

Use your own creative and upload your PDF file.


Order history information available for all users.


Use any programming language, library or framework that supports HTTP actions and JSON.

What is the difference between our APIs?

  Direct Mail API Print / Ship API
Purpose of our API Save time by automating your direct mail postcard campaigns that send mail via USPS  to consumer homes/apartments (or individual business addresses) Save time by automating the printing and FedEx shipping of your bulk marketing materials to a single address location
Ideal for Targeted direct mail postcards for: prospecting, acquisition, customer follow-up, personal touches, reminders, and more.  Fast 24-hour turnaround for high quality, direct marketing advertising, and communication materials
Minimum order quantity 1 piece 20 pieces
Solution summary Upload design, get/provide a list, create a quote, submit the order Upload design, provide an address, create a quote, submit the order
Scope of distribution USA, using the USPS. First class or standard mail options USA, Canada, Bahamas, and US territories. Variety of FedEx shipping options available
Target lists Upload your list and/or use our USA consumer list. A shipping address
Available products Standard, jumbo and panoramic postcards, mailed flyers Postcards, business cards, flyers, brochures, booklets, invitations, greeting cards, door hangers, posters
Unit (per piece) pricing Starting price of $0.72 per card Postage, mailing list and in-house printing included Postcards starting at $0.10 per card.  Includes next business turnaround, in-house printing, a variety of paper stocks and finishing options
Fees No monthly subscription or per API call fees
API key shelf life 1-year token session length
Customer support 800.637.7373

Why Direct Mail?

Need five reasons to help your customers acquite new customers and further differentiate their local business?

  1. Direct mail and print materials influence purchasing decisions (58% of consumers say they open and read direct mail offers
  2. Direct mail outperforms online display when it comes to ROI (mail has a 41% ROI versus online advertising at 20% ROI)
  3. Direct mail resonates with women and baby boomers (women are 2.4 times likely to enjoy mail promotions and print offers versus online
  4. Consumers respond to direct mail abandoned shopping cart and holiday offers (direct mail response rates can be 9X higher than paid search, social media, and online display ads)
  5. Local messaging is compelling when used in direct mail (30% of consumers say that featuring a local business or restaurant in direct mail or print materials is crucial to capture their attention)

Source: Infogroup, 2018