Eliminating the thick-client refresh cycle

A regional bank's helpdesk team of 200 agents all rely on a legacy 3270 application to look up customer accounts. Every OS upgrade or workstation middleware replacement requires re-imaging machines and re-deploying the 3270 emulator client — a weeks-long process managed by a stretched IT team. With Connect/3270, agents open their session from any browser on any device. IT retires the client entirely.

Closing the middleware attack surface

A government agency undergoes a security audit and discovers their existing web-to-host solution routes all 3270 traffic through a third-party middleware server sitting in the DMZ — a significant and previously unaudited attack vector. Switching to Connect/3270 moves the entire session stack onto z/OS, where SAF access controls already govern every transaction. The middleware server is decommissioned.

"Our auditors asked where the 3270 data goes between the browser and CICS. Now the answer is: nowhere it didn't already have to go."

Automating month-end CICS batch workflows

A logistics company runs month-end reporting by having operators manually navigate a series of CICS screens — entering dates, triggering jobs, confirming outputs — a process that takes 3 hours and is prone to input errors. A developer uses the Connect/3270 REST API to script the entire sequence in Python. The workflow now runs unattended, triggered by a scheduler, and completes in under 10 minutes.

AI agent reads and acts on mainframe screens

An insurance firm wants to modernise claims processing without rewriting their core z/OS application. Using the Connect/3270 REST API, they connect an AI agent (built on Claude) that reads claim data directly from CICS screens, extracts structured information, applies business rules, and flags exceptions — all without a human operator in the loop. The mainframe application is untouched; the AI handles the interpretation layer.