IBM CICS Transaction Gateway provides secure access to CICS from Java applications, using Internet protocols (for example TCP/IP). CICS TG has an API to allow programmers to use the features of a J2EE-compliant runtime environment.

The CICS Universal Client

CICS Universal Client

The CICS Universal Client enables users to access transactions or programs on a CICS application server from a remote machine. It communicates with the CICS server via a selection of protocols ....

is a part of the CICS Transaction Gateway, sometimes sold separately, which allows similar connections from C, C++ and COBOL to CICS.

The Help for CICS Transaction Gateway is available to read online
and also in their
Information Center