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By developers, for developers

Modernize your IBM i

Modernization means taking the best aspects of your IBM i environment and building upon them. RPG API Express helps your business unlock the true potential of the RPG language.

  • Integrate any API with REST & SOAP capabilities
  • Capture partner data with JSON & XML creation and parsing
  • Develop in 100% RPG without relying on drivers and middleware
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Developer Working on 3 Screens to Build RPG API Express Program
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Simplify your development

RPG API Express is a library of commands and subprocedures designed to simplify and streamline RPG-based API development. Build applications faster with utilities, code generators, and a vast array of other powerful tools.

  • Generate JSON & XML subprocedures
  • Develop programs using a unified API of connected functions to accomplish a variety of tasks
  • Leverage CCSID conversion, MD5 & SHA hashing, and Base64 endocidng and decoding.
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Build fast, responsive systems

RPG API Express is built using 100% RPG, optimizing your development and helping provide lightning fast responses. Gone are the days of waiting for dozens of Java instances to slowly boot up - RPG Express utilizes the IBM i to its fullest capacity.

  • Save hours of development time
  • Build programs faster using our API documentation with example programs and tutorials
  • Build on a variety of operating systems, from 7.1 to 7.5
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Backed by expert-level RPG developers

RPG API Express is the ultimate supported API solution, meaning you will have access to a diverse team of seasoned RPG programmers to solve every one of your needs.

  • You’ve got development questions, we’ve got answers
  • Know that our team can help you during critical transitions
  • Don’t risk it with open source; have a production-ready team to help
RPG API Implementations

Connect to APIs with RPG API Express

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Google Maps API

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The Google Maps API web services contain a collection of HTTP interfaces to Google services providing geographic data for your maps applications. This collection includes the following APIs: Directions API, Distance Matrix API, Elevation API, Geocoding API, Time Zone API, and the Places API. Further documentation on all of the available web services can be found here.
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AWS Documentation

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Amazon provides a wide range of enterprise class web services for businesses in categories including networking, storage, content delivery, analytics, mobile services and more. Some common services include Amazon EC2, Amazon Glacier, Amazon S3, Amazon MWS, and many more. Check out what you can do with Amazon.com by clicking below. Check out what you can do with Amazon.com by reviewing documentation here.
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Wordpress REST API

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The WordPress API provides a way for applications to work with your WordPress site via sending and consuming JSON data. This API allows you to make use of a swath of API tools native to WordPress, such as: FileSystem API, Plugins API, Options API, Metadata API, Shortcodes API, Theme Adjustment APIs, Widgets API, and many others. These can all help you make the most of WordPress with REST APIs.
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CRM Application API

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SugarCRM provides a CRM (customer relationship management) application with various different editions. A comprehensive developer guide is available as an introduction to basic CRM concepts and aids in providing familiarity with the Sugar system. Check out the resources available here.
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CRM SOAP API

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Salesforce provides another CRM alternative and has been a leader in the CRM application development community for years. With five “editions” now available to choose from, there is a solution available for businesses of all sizes. The complete SOAP API Developer’s Guide can be found here.
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eCommerce Documentation

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Adobe Commerce has been touted as “The most flexible enterprise-class platform to power your business.” Offering both a Commerce Merchant and Cloud Infrastructure edition, multiple deployment options exist to scale in line with your eCommerce business needs. Complete documentation on their available REST web services is available here.
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FedEx Shipping API

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Similar to UPS, FedEx allows businesses to easily access shipping, rating, tracking and many other features. Their developer resource center provides information on various web services allowing you to compare shipping rates, compare transit times, create shipping labels, process return shipments, and complete international shipping. Using RPG APIs, you can connect to a variety of postal web services. For more information visit FedEx’s documentation site here.
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LTL Shipping API

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Formerly known as Yellow Freight, YRC Freight APIs help you seamlessly integrate LTL shipping data into your core business applications. Available APIs include the Terminal Location API, Tracking API, Rate Quote API, and Document API. Documentation on these and more can be found here.
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Sales Tax Tables API

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TaxCloud provides a FREE sales tax calculation web service interface. By leveraging the TaxCloud API you’re able to access sales tax tables which appropriately calculate sales tax and remit sales tax appropriately based on product attributes, geographic locations, and more. For more information, visit the TaxCloud API documentation here.
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Data Validation API

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Experian provides data quality services for both postal addresses and email addresses. With Experian data services you can ensure your address data is accurate BEFORE populating internal databases. Postal address validation tools facilitate the standardization of data to USPS specs. Learn more about Experian here.
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Payment Transaction APIs

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PayPal provides a collection of classic APIs and REST APIs that facilitate simple payment transactions using PayPal or credit cards. Classic APIs provide for more complex payment transactions including subscriptions. Check out detailed documentation for the API of your choice here.
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Fleet Management API

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Descartes provides an easy and affordable way to plan, optimize, dispatch routes, track, and monitor delivery fleets in real time. It optimizes both static routes and dynamic routes to maximize efficiency by taking into account geographic zones, time windows and other physical constraints when planning delivery fleets. Listen to Shari Wiseman, current Kato Integrations customer, elaborate here.

See examples of RPG API Express in production

Read more
  • Integrations

Unlocking Elliott Beach Rental APIs with RPG API Express

RPG API Express helps develop Elliott Beach Rentals' data exchange capabilities through an API to connect with security mechanisms.
  • 3 min read
  • Kato Integrations Team
  • Integrations

Document Conversion With the IBM Bluemix API and Watson

Kato Integrations shows you how to communicate with the IBM Bluemix APIs using RPG API Express, the ultimate web service toolkit!
  • 4 min read
  • Kato Integrations Team
  • Integrations

Customers Use Professional Services to Consume Affirm API

A long-standing customer of ours needed to communicate via the merchant tools at Affirm API. RPG API Express helped make that happen.
  • 2 min read
  • Kato Integrations Team

RPG development is a hard job; RPG API Express lets you take it easy

Ready to get started? Get in touch with us for a fully featured 30-day trial of RPG API Express.

Try RPG API Express free for 30 days

Need reinforcements for a big project? Try Professional Services!

RPG API Express is truly comprehensive, but sometimes you just need more manpower. Hire our team to help build out your next API project.

Learn more

We've rebranded!

We're thrilled to announce that Krengeltech has officially rebranded to Kato Integrations. We believe that the new name better represents the power and versatility of our integrations, and we can't wait for you to see what's in store.