# HTTP output for stadtpuls.com IoT platform

**URL:** <https://discuss.elastic.co/t/http-output-for-stadtpuls-com-iot-platform/296777>\
**Category:** Logstash\
**Created:** [February 9, 2022, 6:09pm UTC](https://discuss.elastic.co/t/http-output-for-stadtpuls-com-iot-platform/296777 "2022-02-09T18:09:04Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [February 11, 2022, 10:31pm UTC](https://discuss.elastic.co/t/http-output-for-stadtpuls-com-iot-platform/296777/4 "2022-02-11T22:31:43Z")

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You unconditionally remove the [app\_id] field in the second mutate, so it will not exist when the event reaches the output section.

If you want to use the app\_id in the output section but do not want it sent to the output then use `[@metadata][app_id]`. Then you can test it in the conditional but it will not be sent on with the event.

I hope that helps. It is not entirely clear what you are asking.

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