LetterStream API | LetterStream Blog

How Using LetterStream’s API Saves Companies Time, Money, and Sanity

LetterStream’s API allows companies to automate business-critical mail.

Behind every successful operations team is one core truth: they didn’t get there by printing and stuffing envelopes by hand.

Automation has become the backbone of modern business operations, especially for teams managing recurring or high-volume mail. And if you’ve ever wished you could hit “send” on a document and have it magically turn into trackable Certified Mail or just a First-Class letter… you’re closer than you think.

With the LetterStream API, developers and operations leaders can fully automate the printing, processing, and sending of snail mail, securely and efficiently.

Here are five real-world use cases that show how the LetterStream API saves time, reduces stress, and helps teams work smarter (not harder).

1. Automate Late Payment Notices from Your CRM

Still sending out manual past-due letters? With the LetterStream API, you can connect your CRM or billing platform to automatically trigger a physical notice after a set number of days.

Let’s say a customer hasn’t paid within 30 days. Your system can generate a PDF notice, ping the LetterStream API, and send the letter via First-Class Mail—without anyone printing or folding a thing.

Need to add Certified Mail for legal protection? You can include that logic too. Tracking numbers, digital proofs, and delivery data all included.

This is how finance and AR teams turn chaos into consistency.

2. Trigger Mailings from Your Internal Software

Whether you’re using custom ERP tools, a ticketing system, or something built in-house, if it can send a webhook or make an HTTP request, it can send mail through LetterStream.

Imagine this:

An eviction notice is triggered when a resident’s file status changes
A violation letter goes out when a photo is uploaded in your HOA software
A legal firm’s case management system auto-generates and sends a filing notification

If you’ve got software that manages workflows, you’ve got the power to connect it directly to our print and mail software—and make the paper part disappear.

3. Bulk Job Scheduling and Batch Mail

Need to send 500 notices each Friday? Or maybe you’re processing thousands of monthly statements for clients?

With the LetterStream API, you can script and schedule batch jobs that send all your mail at once, pulling from databases, applying templates, and routing based on zip code or content.

You stay in control, and your team avoids the last-minute, end-of-month stress. Plus, you’ll always have a full audit trail to reference, including file uploads, job IDs, and delivery confirmations.

Pair this with StreamLogic™, and you can build in automated logic to handle special rules, like Certified Mail for certain states or alternate return addresses for specific regions.

4. Empower Your Customers

If your business offers SaaS tools to other companies—think property management platforms, legal software, or fintech tools—you can integrate the LetterStream API directly into your platform.

That means your users can send Certified Mail or First-Class Mail without ever leaving your website.

You get:

Embedded mailing capabilities
Brand consistency (you can white-label the experience)
Zero support tickets about printers or postage

We handle the print, insert, and send. Your platform gets the credit. Everybody wins.

5. Create a Compliance-First Mailing System

If your industry deals with HIPAA, legal timelines, or regulatory disclosures, the API allows you to bake secure, traceable mail delivery into your compliance workflows.

No more guessing if something was sent. No more “we thought the admin handled that.”

Every job has a digital record, every piece of Certified Mail is trackable, and you can see when it was mailed from our end.

For healthcare groups, law firms, and insurance providers, this turns compliance from a risk into a repeatable system.

Let Your Systems Do the Sending

The best part? Your team can stop wrestling with stamps and focus on work that actually moves the business forward.

When physical mail becomes just another API call, everything gets smoother: timelines, compliance, customer experience, and morale.

Learn more about LetterStream’s API, here.

LetterStream offers bulk printing and mailing services, allowing companies to send physical mail online. Whether it’s online Certified Mail, First-Class Mail, FedEx 2Day, or postcards, we give both small businesses and large corporations that time and freedom back to work on tasks that better serve the company. If you’re interested in creating a free account, you can do so here.

How to Leverage Letterstream’s API to Send Mail Online

LetterStream’s API helps businesses automate sending mail online.

Still uploading spreadsheets and manually sending documents through a dashboard?

If your systems can talk to each other—but your mail still depends on someone hitting “print”—you’re leaving time, accuracy, and efficiency on the table.

Modern businesses aren’t just adopting digital tools. They’re connecting them. And if you’re still managing physical mail as a separate, manual process, it might be time to bring it into the fold—through automation.

That’s where the LetterStream API comes in.

Meet the LetterStream API: Built for Real Business Workflows

Our Application Programming Interface (API) allows you to trigger physical mail jobs—First-Class, and Certified Mail—directly from your own systems. No more logging in. No more uploading. Just a clean, secure handoff from your database or CRM to the mailbox.

In other words: your software sends the job. LetterStream handles the rest.

Use cases include:

Triggering Certified Mail when a case status changes in your legal software
Automatically mailing statements from your billing platform each month
Sending notices from your internal tools without needing a dashboard or admin

It’s the kind of automation that turns “How do we send this?” into “It’s already sent.”

What Can You Automate with the LetterStream API?

Once integrated, the API allows you to:

Create mailing jobs in real time
Upload PDFs and addresses directly from your system
Specify mail class (First-Class, and Certified Mail online)
Monitor job status through webhooks or queries
Access delivery confirmations, return receipts, and tracking data automatically

It’s flexible, lightweight, and developer-friendly—built with clean documentation, real code samples, and the support your team actually wants (instead of a 72-page manual with no index).

Need to get HIPAA notices out fast? Want tracking for every customer notice sent as Certified Mail? Done.

Real-World Example: A Law Firm Gets Its Thursdays Back

A midsize legal firm once spent every Thursday printing, assembling, and mailing compliance letters. Tracking Certified Mail was a manual task involving green cards and spreadsheets.

Now, as soon as a case hits a specific milestone in their legal software, a Certified Mail job is sent automatically through the API. It includes:

The correct recipient
A templated letter
Real-time tracking
Optional electronic return receipt

No late nights. No manual entry. Just automated compliance—and a team that gets to leave the office on time.

Why It’s About More Than Time-Saving

Sure, automation saves time. But when you’re sending critical, regulated, or time-sensitive mail, it also reduces risk. Manual processes come with built-in error potential.

For industries like:

Healthcare (HIPAA timelines and privacy requirements)
Legal (court deadlines and delivery proof)
Finance (statement timing and compliance notices)
HOAs (violation notices, ballot delivery, late fees)

…the LetterStream API provides a secure, trackable, and documented system for sending mail online, with the confidence of a digital audit trail.

No Platform Overhaul Required

This isn’t a rip-and-replace. You don’t have to change your CRM, build a new dashboard, or train your entire team.

In fact, you don’t even have to start big.

Many of our customers begin by automating one simple use case—like sending First-Class statements each month—and scale from there.

Need help from our team? We’ve got you.

Why Our Smartest Customers Use the API

It’s not just about convenience. It’s about building systems that:

Reduce human error
Create consistency across teams
Maintain compliance
Free up time for high-impact work

Instead of reacting to last-minute mail needs, your business can operate with proactive, automated workflows that scale with you—without breaking under pressure. That’s the real win.

LetterStream makes print and mail a breeze!

How to Transform the Way You Send Mail With APIs

In today’s digital age, the term “API” is a buzzword that’s gaining traction across various industries. But what exactly is an API, and why is it crucial for businesses, particularly those aiming to streamline their operations when it comes to sending mail online? Well, let us tell you. We believe in leveraging technology to simplify processes, and our print and mail APIs are designed to do just that. Let’s dive into the world of APIs and discover how they can revolutionize your mailing needs.

What is an API?

API stands for Application Programming Interface. In simple terms, an API is a set of rules and protocols that allows different software applications to communicate with each other. Imagine APIs as the middlemen that facilitate interactions between software systems, enabling them to share data and perform tasks seamlessly. APIs are essential for integrating different systems, allowing them to work together efficiently and effectively.

The Power of APIs in Mailing Services

For businesses such as Homeowners Associations (HOAs), law firms, government agencies, healthcare providers and other enterprises, sending mail is a regular but critical task. In the past, this involved manual processes that were time-consuming and prone to errors. However, with the creation and power of APIs, these tasks can now be automated, reducing the workload and increasing accuracy for businesses.

Here’s where we come in. We offer robust print and mail APIs that allow businesses to send mail automatically through our website. Our send mail APIs are designed to integrate smoothly with your existing systems, making the process of sending mail as easy as a few clicks. Whether you need to send invoices, legal documents, annual meeting notices, past-due notices, check mailing APIs or postcards our APIs handle it all with accuracy and speed.

How LetterStream Incorporates APIs

computer with a bunch of envelopes flying out of it and into a mailbox

Our journey with APIs is driven by our commitment to innovation and efficiency. By incorporating APIs, we enable businesses to automate their mailing processes, saving time and reducing costs and who wouldn’t want that? Here’s how it works:

Seamless Integration: Our APIs are designed to integrate effortlessly with your software, whether you use a custom-built solution or popular platforms. This means you can send mail directly from your application without needing to switch between different systems.
Automation at Its Best: Once integrated, our APIs handle the entire mailing process automatically. From printing to postage, everything is managed through our secure and reliable system. You can schedule mailings and track deliveries all through the print-on-demand API.
Customization and Flexibility: We understand that every business has unique needs. Our APIs are highly customizable, allowing you to tailor the process according to your specific requirements. Whether you need to send bulk mailings or individual letters, our API integration offers the flexibility you need.

Benefits of Using APIs

Our print and mail APIs offer significant advantages across various industries. By automating the mailing process, businesses can save time, reduce costs, and enhance efficiency. Here are some key benefits:

Automation: APIs allow for the automatic sending of various mail types, such as First-Class Mail for notices and billing statements, Certified Mail and FedEx 2Day for eviction notices and legal communications, flats for larger mailings and postcards for community information and news. This reduces the need for manual intervention and minimizes the risk of errors.

Security: With built-in security features, our APIs ensure that sensitive information, such as legal documents and patient communications, is handled with the utmost care, complying with relevant regulations and standards.

Efficiency: By streamlining the process of sending mail, businesses can ensure timely communication with their audiences. Whether it’s sending official notices and forms, or communicating important information, API printing and mailing enables quick and efficient mail distribution.

Cost Savings: Automating mailing processes reduces administrative burdens and operational costs. Businesses can allocate resources more effectively, focusing on core business needs rather than manual mailing tasks.

Scalability: Our APIs are designed to handle varying volumes of mail, from individual letters to bulk mailings. This scalability makes it easy for businesses to manage their mailing needs as they grow.

By leveraging our snail mail APIs, businesses can enhance their communication strategies, maintain compliance with regulations, and improve overall operational efficiency. Explore the LetterStream API Partnership to enhance your business operations today!

Send Mail Magically With The LetterStream API

LetterStream API Solution

Ever wish for an even faster way to send out USPS First-Class and Certified Mail?

Our website already saves countless hours of tedious work involved with sending mail, but you might be sending so much mail that you need an even faster way.

If so, the LetterStream API might be the solution you need. It allows you to automatically send thousands of pieces of mail instantly through a behind-the-scenes connection to LetterStream computer systems. Most APIs require programmers to implement them, and ours is no different in that regard, but some of our clients have implemented it in just a few days.

Our API is being used by many different types of companies, including software companies, collection agencies, billing companies, etc. and even individuals who need to send a lot of mail quickly. It has access to many of the mailing products available on our website including postcards, first-class letters, invoices, statements, newsletters, checks and certified mail.

You can advertise your partnership with LetterStream or keep it quiet and price the mailings to your customer however you see fit; because with the API your users and customers can send real mail without even knowing about LetterStream.

To learn more, click here to get detailed information about our API, or simply contact us to get started.

LetterStream Joins ACA International – Visit Us At The Expo This Week!

ACAinternationalLogo

LetterStream‘s ability to send First-Class and Certified Mail with ease, one-at-a-time and in bulk, is attracting the attention of credit departments and collection agencies.

ACA International, the Association of Credit and Collection Professionals, is a not-for-profit trade association for professional businesses and individuals in the credit and collection industry.

By establishing an affiliate membership with ACA, LetterStream will have a greater presence in the collection and credit market and can highlight their unique solutions in the field.

Sending Certified Mail during a collection process can be a time consuming process. However, with LetterStream’s easy-to-use website, Certified Mail can often be created and mailed the same day. In addition, online tracking and signature reporting tools provide easy access to the important documents that prove the mailing followed proper collection practices.

For industry collection software and service bureaus that send large quantities of mail from various departments, LetterStream’s API allows automatic transmitting of letter data directly to LetterStream for printing and mailing. This process makes all the work involved in printing and mailing completely disappear.

Visit LetterStream at the ACA International Spring Forum and Expo in Scottsdale, Arizona this week.

2013 Spring Forum & Expo
March 20-22, 2013
Talking Stick Resort – Scottsdale, Ariz.

CAI Trade Show in Las Vegas

LetterStream Homepage

We just returned from a trip to Las Vegas for the 2012 National CAI Trade Show.

This show was the debut of our new booth and newly redesigned brochures. We enjoyed seeing many of our customers at this show; it’s always great fun to hear how we liberate them from the folding and stuffing process of getting a mailing out the door.

It was great to see the traction of our mail-making API. Several of the software companies attending were already displaying the LetterStream partner logo and many others expressed interest in connecting to our servers via the API in order to send postcards, first-class mail and certified mail.

Currently we have partners consisting of community management software companies, collection companies, legal document prepares and large certified mail senders integrating with us.

Follow this link to learn more about the LetterStream API