From a finished thought to a posted letter
IRIS prints and mails individual letters and postcards to US addresses. Use the website for a hands-on review, or connect your software to an approval-controlled mailing workflow.
Compare mailing features
The same mailing, two ways to prepare it
The website guides you through a single mailing. REST and authenticated MCP let your application prepare that mailing while keeping preview, review, and approval in your own process.
Upload a finished letter PDF, start with a guided template, or personalize a postcard with artwork or your own photo.
Your application renders the final letter PDF or print-ready postcard files, then uploads and registers them. The API does not compose the letter or design the artwork.
Check the document preview or postcard faces, mailing details, selected options, and final price before checkout.
Your application shows the actual printable files and current quote to a person. It must enforce approval before allowing a paid submission.
A sender name and return address, plus a recipient name and delivery address, are required. Review them before paying.
Supply complete named sender and recipient addresses with each mailing. Missing required details must be corrected before the order can proceed.
Review the letter print settings and available mailing services in checkout. Use the postcard editor for a full-color card with First-Class postage.
Request a quote for the supported product and options in the documentation. Availability is checked for the selected mailing before charging your account.
Review the order total before completing payment through checkout. The pricing page and calculator help you compare your options first.
Request a server-calculated quote in US cents. Submission recalculates the price and uses prepaid credits; a quote neither reserves a price nor creates an order.
Keep your confirmation and order reference, then use the order page to check progress and any available postal events.
Save the returned order ID and read its current status. Your application handles follow-up; available tracking and estimated dates can be absent.
Choose the service for the record you need
For letters, compare the available standard and Certified Mail options before ordering. If you need a return receipt, check that option and its purpose separately. Use the current price calculator to estimate your specific mailing.
Postcards use their own print format and First-Class postage. Keep sensitive information out of a postcard, because its message is visible during printing and delivery.
Payment confirms an order. Printing, postal submission, and delivery are later stages; a paid order is not proof that the recipient has received the mailpiece.
Postal events depend on the product and service. Ordinary First-Class correspondence does not include the same USPS Tracking service as a tracked package. Available scans or estimated dates should not be treated as a delivery guarantee.
IRIS is for printable, individual outbound correspondence to US addresses. It does not provide inbound mail scanning, package shipping, mailing-list campaigns, scheduling, or international delivery. Official forms may need an original signature or a different submission method; review their issuer instructions and our acceptable-use rules.
Pick the thing you want to send
Have your final PDF and both names and addresses ready. You will review your document, mailing options, and price before paying.
Prepare a letterChoose an illustration or upload your photo, add your message, and review the postcard before ordering.
Create a postcard