This is a really simple webhook implementation that gets Api.ai classification JSON (i.e. a JSON output of Api.ai /query endpoint) and returns a fulfillment response.
More info about Api.ai webhooks could be found here: Api.ai Webhook
It's a workitem create service to create checkbook
The services takes the
workitemtype parameter from the action, performes create for workitemtype.
The service packs the result in the Api.ai webhook-compatible response JSON and returns it to Api.ai.