# Querying API On Input With Variables

**URL:** <https://discuss.elastic.co/t/querying-api-on-input-with-variables/273688>\
**Category:** Logstash\
**Created:** [May 21, 2021, 4:31pm UTC](https://discuss.elastic.co/t/querying-api-on-input-with-variables/273688 "2021-05-21T16:31:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wwalker](https://avatars.discourse-cdn.com/v4/letter/w/43a26b/32.png) [@wwalker](https://discuss.elastic.co/u/wwalker)\
**Post date:** [May 21, 2021, 4:31pm UTC](https://discuss.elastic.co/t/querying-api-on-input-with-variables/273688/1 "2021-05-21T16:31:18Z")

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I am trying to hit a HTTP API with time constraints included. The API allows you to pull results since a specified time in the format of `yyyy-MM-dd'T'HH:mm:ss:SSS z`. Is there an input that would allow me to specify this dynamically based on the last time a call was made? The JDBC input, for example, has this capability in it for SQL calls with the `:sql_last_value` variable.

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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:** [May 21, 2021, 5:30pm UTC](https://discuss.elastic.co/t/querying-api-on-input-with-variables/273688/2 "2021-05-21T17:30:33Z")

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In short you cannot do that with an input. There is a much longer response about doing it with a filter [here](https://discuss.elastic.co/t/get-service-now-com-data/244320/2).

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 18, 2021, 5:31pm UTC](https://discuss.elastic.co/t/querying-api-on-input-with-variables/273688/3 "2021-06-18T17:31:11Z")

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