Hi Sunil,

While there isn't any out of the box integration support for DB2 it does look like DB2 supports REST:

https://www.ibm.com/support/knowledgecenter/en/SSEPEK_11.0.0/restserv/src/tpc/db2z_restservices.html

I'm not sure if the version of DB2 you're on supports that or not but if it does that would be the best route.

Otherwise, there is this custom broker from the K2 Market but, as you may already know, you would have to validate it against K2 Five as it isn't a formal supported component of the product:

http://community.k2.com/t5/K2-blackpearl/IBM-i-or-AS400-Service-Broker/ba-p/1113

Thanks,

Jimmy