# Json request to call flowable engine

**URL:** <https://forum.flowable.org/t/json-request-to-call-flowable-engine/6433>\
**Category:** Flowable Engine\
**Created:** [July 24, 2020, 9:41am UTC](https://forum.flowable.org/t/json-request-to-call-flowable-engine/6433 "2020-07-24T09:41:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![VidyaGaikwad](https://avatars.discourse-cdn.com/v4/letter/v/e480ec/32.png) [@VidyaGaikwad](https://forum.flowable.org/u/VidyaGaikwad)\
**Post date:** [July 24, 2020, 9:41am UTC](https://forum.flowable.org/t/json-request-to-call-flowable-engine/6433/1 "2020-07-24T09:41:17Z")

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Hi all,

I am new to flowable. i have a use case where a service is calling flowable engine and passing an input object (having 5 or more variables) as a json and my process is triggered to call another external service via REST. I am using http task to call RESTful API. I want to use few variables further in my process to call some other external service via REST. Can someone help me in that. Is it possible to pass those variables/parameters.

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**Author:** ![joram](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/joram/32/26_2.png) [@joram](https://forum.flowable.org/u/joram)\
**Post date:** [July 30, 2020, 5:06pm UTC](https://forum.flowable.org/t/json-request-to-call-flowable-engine/6433/2 "2020-07-30T17:06:43Z")

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Process variables are stored until the instance is finished. So if you set them, they’ll be available later on in the process.