Hopper: Agentic TN3270 Terminal
The first agentic development environment for the mainframe.
Use AI agents to navigate TN3270, inspect datasets, write JCL, debug jobs, query VSAM, and operate inside z/OS from a modern development environment.
An agent that understands z/OS
Drives ISPF by panel ID, writes column-strict JCL, decodes spool failures into structured diagnostics, and queries VSAM as SQL.
Learn about agentic mainframe development
Compile, test, ship in one prompt
Drives the JCL, parses JES return codes, NEWCOPYs into CICS, and pauses for your approval before every change.
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Debug failed jobs without hunting through SDSF
Hours of SDSF triage in one @-tag. The agent decodes JESMSGLG, JESYSMSG, and SYSUDUMP into the abend code, failing step, and source line.
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A real TN3270 terminal, when you need it
Works exactly like the TN3270 you've used for years. Full PF, PA, and attention-key support.
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Pricing
Hobby
Includes:
- No credit card required
- macOS, Windows, and Linux
- Connect to your own mainframe
- All core Hopper features
Enterprise
Everything in Hobby, plus:
- SAML SSO
- MCP Server Access
- Admin and Model Controls
- Org-wide Privacy Controls
- No Model Training
- Priority Support
- On-prem / VPC Deployment
- SOC 2 & Pen Test Reports
Download Hopper, connect to your LPAR, and start shipping
Join our community
Connect with builders using Hopper, follow product updates, and swap ideas with the Hypercubic team.