API
Application Programming Interface
Leverage “The Stream”
Cloud-based Platform • Advanced Print Technology • Extensive Knowledge Producing Mail
Our API allows you to leverage LetterStream’s services, giving you the flexibility to build solutions that fit your needs. We offer three primary modes: Partnership, Automation, and Monetization modes, each using the same API and designed to serve different business models and relationships. Learn more below about each Mode.
Pick A Plan
Understand LetterStream API Options
- Simplify the process for your customers to send mail
- Our API allows you to push documents to your client’s LetterStream dashboard.
- Support and billing handled by LetterStream
- Automate your internal process of sending mail
- We become your in-house virtual mail room
- Send one or thousands
- Earn income from the print and mail process
- Maximize the benefits to your users and earn revenue
- Set your own prices
- LetterStream is hidden in the background
- Monetize your mail forms
Partnership
- You are looking for a print-to-mail solution to enhance your capabilities
- LetterStream controls the billing relationship with your customer
- LetterStream controls the pricing to your customer
- LetterStream supports the customer service relationship
- The user pays for printing-and-mailing through LetterStream’s online portal
- You simplify the loading of jobs into your customer’s LetterStream account
- LetterStream prints and mails the customers documents
Automation
- You are wanting to automate printing-and-sending mail
- You want to reduce staff, headaches, or supply chain management
- You want LetterStream to bill your organization
- You are LetterStream’s customer
- You are supported by LetterStream’s customer care team
- Documents may come from one or many divisions within your organization, but are sent to LetterStream from your organization only (no external customer)
Monetization
- You are looking to monetize print-to-mail from your customer
- You control billing relationship with your customer, while LetterStream bills you
- You control pricing to your customer
- LetterStream doesn’t know your customer
- You provide your customers with customer service and/or all help
- You push your documents to LetterStream for print-to-mail
- LetterStream Prints and mails the documents
Partnership Mode
The Partnership mode is ideal for businesses that want to send their customer’s documents to LetterStream, while we handle everything else — from billing to customer service. Your solution simplifies the loading of jobs into your customer’s LetterStream account. Your customers interact directly with us, and you benefit by offering them access to a reliable, on-demand print-and-mail platform without internal overhead.
- Devote less internal resources (time, staff, cost) to non-revenue generating processes (cost center) — outsource the print and mail process
- Streamline the print and mail process across multiple business centers
- Control costs and increase accountability
- Offer solutions you would not otherwise have without adding overhead
- Allow LetterStream to handle the customer care relationship
- LetterStream handles the billing process
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Automation Mode
The Automation path is for companies that want to outsource their internal mail operations. Whether it’s an enterprise with multiple departments or a platform that generates high volumes of outbound mail, these customers use the LetterStream API to send documents to us for printing and mailing — and we bill them directly. We act as their mailroom and manage support, ensuring a hands-off experience after integration.
- Remove humans from sending process
- Send unlimited quantities (with no minimum)
- Activity reporting at account level
- Leverage the power of StreamLogic while replacing your mailroom
Monetization Mode
With Monetization, your business remains front and center. You use the LetterStream API behind the scenes, but maintain full control over your customer relationship — including pricing, billing, and support. We never interact with or even see your end users. This mode is perfect for platforms or SaaS companies looking to offer mail services under their own brand while using LetterStream as the engine behind the scenes.
- Looking to monetize a current print and mail process
- Maximize benefits to users and earn revenue at the same time
- You control client-side billing relationship
- Your customer does not know LetterStream exists
- You control pricing
- Fully automated bi-directional integration
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Need Help Sending Larger Corporate Mailings?
We Make Mailing A Breeze!
Frequently Asked Questions
What Integration Modes Does LetterStream Support?
Automation: The Automation path is for companies that want to outsource their internal mail operations. Whether it’s an enterprise with multiple departments or a platform that generates high volumes of outbound mail, these customers use the LetterStream API to send documents to us for printing and mailing — and we bill them directly. We act as their mailroom and manage support, ensuring a hands-off experience after integration.
- Remove humans from sending process
- Send unlimited quantities (with no minimum)
- Activity reporting at account level
- Leverage the power of StreamLogic while replacing your mailroom
Monetization: With Monetization, your business remains front and center. You use the LetterStream API behind the scenes, but maintain full control over your customer relationship — including pricing, billing, and support. We never interact with or even see your end users. This mode is perfect for platforms or SaaS companies looking to offer mail services under their own brand while using LetterStream as the engine behind the scenes.
- Looking to monetize a current print and mail process
- Maximize benefits to users and earn revenue at the same time
- You control client-side billing relationship
- Your customer does not know LetterStream exists
- You control pricing
- Fully automated bi-directional integration
Partnership: The Partnership mode is ideal for businesses that want to send their customer’s documents to LetterStream, while we handle everything else — from billing to customer service. Your solution simplifies the loading of jobs into your customer’s LetterStream account. Your customers interact directly with us, and you benefit by offering them access to a reliable, on-demand print-and-mail platform without internal overhead.
- Devote less internal resources (time, staff, cost) to non-revenue generating processes (cost center) — outsource the print and mail process
- Streamline the print and mail process across multiple business centers
- Control costs and increase accountability
- Offer solutions you would not otherwise have without adding overhead
- Allow LetterStream to handle the customer care relationship
- LetterStream handles the billing process
How Do I Get Started With The API?
The API is not enabled by default—you may request access, and once approved, sample files, code, and documentation become available in your LetterStream account under “My Account.”
You will need just a few hours time from a software developer to implement our API code into your application.
Book time with Aaron for a LetterStream Demo or if you have specific questions.
Can I Track And Get Status Updates From Mail Send Via The API?
Yes.
After submission, you can poll job status, receive callbacks/webhooks for status updates (every ~4 hours), and access tracking info, delivery confirmations, and return receipts for Certified Mail.
Does LetterStream Process My Mailing Immediately After Submission?
Yes, once paid, 95% of all mail is sent by the next business day.
Mail jobs submitted via the API are processed once they are paid. You may use a “PrePay” option and set up low balance alerts to automate uninterrupted processing.
What Are The Features Of The Partnership API Mode?
- You are looking for a print-to-mail solution to enhance your capabilities
- LetterStream controls the billing relationship with your customer
- LetterStream controls the pricing to your customer
- LetterStream supports the customer service relationship
- The user pays for printing-and-mailing through LetterStream’s online portal
- You simplify the loading of jobs into your customer’s LetterStream account
What Are The Features Of The Automation API Mode?
- You are wanting to automate printing-and-sending mail
- You want to reduce staff, headaches, or supply chain management
- You want LetterStream to bill your organization
- You are LetterStream’s customer
- You are supported by LetterStream’s customer care team
- Documents may come from one or many divisions within your organization, but are sent to LetterStream from your organization only (no external customer)
What Are The Features Of The Monitization API Mode?
- You are looking to monetize print-to-mail from your customer
- You control billing relationship with your customer, while LetterStream bills you
- You control pricing to your customer
- LetterStream doesn’t know your customer
- You provide your customers with customer service/help
- You push your documents to LetterStream for print-to-mail
| API Features What you get | Partners LetterStream Website/Branding | Automation Removes Humans | Monetization No LetterStream Branding |
|---|---|---|---|
| Send One or More Pieces | ✔️ | ✔️ | ✔️ |
| Automated Send Mail Process | ✔️ | ✔️ | ✔️ |
| Your Branding On LetterStream’s Website | ✔️ | ✔️ | ✔️ |
| Customer Support To Integration Partner | ✔️ | ✔️ | ✔️ |
| Certified Mail Capable Account | ✔️ | ✔️ | ✔️ |
| Online Mailing Status | ✔️ | ✔️ | ✔️ |
| Certified Mail Tracking Information Available | ✔️ | ✔️ | ✔️ |
| Send w/Out LetterStream’s Website | — | ✔️ | ✔️ |
| Fund Account Outside Shopping Cart | — | ✔️ | ✔️ |
| Activity Reports | — | ✔️ | ✔️ |
| Programmer Needed To Activate | — | ✔️ | ✔️ |
| Control Your Pricing | — | ✔️ | ✔️ |
| LetterStream Brand Can Be Hidden | — | — | ✔️ |
| Billing Relationship | — | — | ✔️ |
| Customer Support of User | ✔️ | — | — |
| No Programmers Needed | — | — | — |