Simple integrations for your IBM i

RPG-based IBM i toolkits designed to simplify your integration needs

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Enhance your IBM i like never before. Get in touch to learn more.

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RPG-based solution

A 100% RPG-based solution saves you from hybridizing your development with open source, helping you create the most secure integration on your IBM i. RPG API Express helps you develop secure programs up to current TLS standards.


RPG API experts

Get access to a team of RPG development experts for assistance when you need it. Our professional services staff has implemented hundreds of APIs using both REST and SOAP for JSON and XML environments. We extend your team's capabilities to ensure every project is delivered on-time at the highest quality.


Hyper responsive

Our one-solution approach gives you the ability to connect your IBM i to 3rd party applications, giving you access to valuable partner data without having to rely on a patchwork of open source options. Accelerate application development with a suite of tools to build RPG-based web APIs.

What We Offer

Comprehensive API solutions for your IBM i environment

RPG API Express

Our complete, all-in-one API solution
  • Written in 100% RPG
  • Fully team supported
  • Integrate with REST and SOAP APIs
  • Compose and parse JSON & XML
  • Secure, dependable TLS encryption

API Toolkits

Pre-built API toolkits for specific problems
  • Connect with popular APIs
  • Real-time communication
  • Seamless integration with RPG code
  • Postal and credit card solutions
  • Build at lightning speeds

Kato Spaces

Cost-effective IBM i cloud hosting
  • Most affordable hosting solution
  • 99.990% uptime guarantee
  • Loads of pre-installed software
  • Month-to-month contracts
  • 100% free setup, no commitment

RPG API Express lets you connect with these powerful APIs...

Professional Services

Kato Professional Services extends your team

Customer Stories

Hear from our customers

Your Team

Our service benefits your entire team

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RPG Developer

Resolve all of your API requirements with a uniform, versatile toolkit of RPG subprocedures

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IT Manager

Implement an agile, tailored solution for your integration needs within a matter of days

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Beat the competition while building a sustainable, scalable enterprise

Try RPG API Express free

Get in touch with us for a fully featured 30-day trial of RPG API Express.

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Customer Feedback

Our team of expert IBM i developers work with you to provide answers and customized solutions for your next API project.


Our Process

Discuss, develop, and deploy - with only a few short steps, you'll receive a solution to your API problem.


No Obligation

We'll let you try RPG API Express 100% free of charge with zero billing information required.

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.