CSI Connect
API technology that brings payment automation to your business
You don’t need a PhD in payments. All you need are the right connections. CSI Connect has everything you need to step into a world of innovative payments. We’re not a one-trick pony that creates APIs just for virtual card payments. We offer fully integrated accounts payable APIs, delivering complete batch payments for all transaction types. We also have travel payment APIs locked down along with a roster of smiling travel managers that enjoy the same efficiency and ease as our accounts payable clients.
Think you’re in a vertical we can’t handle? Think again. Our partners include banks, software and ERP systems, Fintech’s, media and advertising agencies, non-profit organizations, construction companies, and many more. Regardless of your industry, we’re a partner that empowers you with the payment platform and API that will work for your business.
Don’t have API capabilities? No problem! We also offer robust FTP services that can handle any .csv or .txt file.
Payments The Way You Need Them
We’re a fast moving and nimble FinTech company inspired by technology and payment trends that let you create and deliver payments exactly the way your business needs to.
Virtual Cards
AP Batches & Payments
Invoices
Webhooks
Travel Payments
Merchants
Total Control Funding
Settlement & Reconciliation
How It Works

Built for Developers, by Developers
Our APIs are built by developers for developers with forward-thinking application development in mind. We have a dedicated team focused on building robust and secure APIs, tailored to your company’s needs based on previous use cases, combined with programming flexibility that allows us to work with any accounting and ERP system. We allow you to focus on building your products.

Built for Innovation
We built our APIs with financial service innovators in mind. We love talking about the future of payments and our software developers love talking APIs. APIs have been described as the engine of innovation. Our APIs have proven to be a major player in the success of our payment innovations and our ability to partner with every vertical as we consistently provide the fastest and most secure payments worldwide.

Built for Visa and Mastercard
CSI is a certified Mastercard processor and has obtained Visa Ready for Business Solutions approval. Using CSI Paysystems you can create and manage secure, virtual credit card numbers with global acceptance through the world’s largest card networks. This not only gives our customers access to innovative payments but it also allows Visa and Mastercard to expand into new services that go far beyond what plastic cards have ever offered.

Built Globally
Headquartered in Bonita Springs, Florida, CSI has 5 global offices with nearly 10,000 customers in 18 countries, across nearly every industry. CSI can process 140 currencies via FX allowing us to run payments anywhere in the world.

CSI Connect Built Securely
Achieve PCI-DSS compliance for your payments just by implementing CSI Paysystems via our APIs.
- CSI maintains PCI-DSS – Level 1 and SOC 2 – Type 2 compliance certifications
- CSI employs the highest level of encryption for data-in-transit and data-at-rest
- CSI ensures tokenization of Primary Account Numbers (PAN) so payment information and instructions are never kept on our servers.
CSI Differentiators
We like to let our experience, innovation-driven teams, global partnerships, and loyal client following speak for itself.
- Over 28 years of experience building innovative payments solutions backed by dynamic teams that consist of the best software developers, finance professionals, relationship managers, and processing geniuses
- Backed by Visa and Mastercard
- API as a Service (AaaS) so our clients can enjoy all the functionality of web services and credit card processing
- The highest level of encryption for data-in-transit and data-at-rest
- Globally trusted by over 10,000 customers across 18 countries and 140 currencies
- Media companies around the globe are rejoicing because of our ghost card APIs which make payments for social ads and specific campaign expenses an easily executed and reconciled process
- Travel Managers far and wide stepping away from their fax machines while creating happier travelers and automated reconciliations
Request the CSI Developer Guide
Our Focus
Your focus should be on running an effective business. Our focus is making it easy.
CSI Connect
API technology that brings payment automation to your business
You don’t need a PhD in payments. All you need are the right connections. CSI Connect has everything you need to step into a world of innovative payments. We’re not a one-trick pony that creates APIs just for virtual card payments. We offer the fully integrated accounts payable APIs, delivering complete batch payments for all transaction types. We also have travel payment APIs locked down along with a roster of smiling travel managers that enjoy the same efficiency and ease as our accounts payable clients.
