# How to use public API

**URL:** <https://discuss.elastic.co/t/how-to-use-public-api/177249>\
**Category:** APM\
**Created:** [April 17, 2019, 9:14am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249 "2019-04-17T09:14:31Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [April 17, 2019, 9:14am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/1 "2019-04-17T09:14:31Z")

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The public API use in official website is only show some api's method , but I don't know how to contact with my project.

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**Author:** ![felixbarny](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/felixbarny/32/27341_2.png) [@felixbarny](https://discuss.elastic.co/u/felixbarny)\
**Post date:** [April 17, 2019, 9:34am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/2 "2019-04-17T09:34:55Z")

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Based on your previous topics, I assume you are using the Java agent?

Which information do you feel is missing from the documentation: [https://www.elastic.co/guide/en/apm/agent/java/current/public-api.html](https://www.elastic.co/guide/en/apm/agent/java/current/public-api.html)

Best,  
Felix

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [April 17, 2019, 9:49am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/3 "2019-04-17T09:49:02Z")

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I don't know weather new a class in my project?

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**Author:** ![felixbarny](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/felixbarny/32/27341_2.png) [@felixbarny](https://discuss.elastic.co/u/felixbarny)\
**Post date:** [April 17, 2019, 10:00am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/4 "2019-04-17T10:00:25Z")

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I’m sorry but I don’t understand what you mean.

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [April 17, 2019, 11:26am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/5 "2019-04-17T11:26:10Z")

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Thanks! I mean I should create a class use public api in my java project?

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**Author:** ![felixbarny](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/felixbarny/32/27341_2.png) [@felixbarny](https://discuss.elastic.co/u/felixbarny)\
**Post date:** [April 17, 2019, 11:50am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/6 "2019-04-17T11:50:49Z")

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You can use the public API from within your existing classes.

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**Author:** ![hyhong](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@hyhong](https://discuss.elastic.co/u/hyhong)\
**Post date:** [April 17, 2019, 12:40pm UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/7 "2019-04-17T12:40:10Z")

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Ok,thanks.I will try it.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 8, 2019, 8:40am UTC](https://discuss.elastic.co/t/how-to-use-public-api/177249/8 "2019-05-08T08:40:11Z")

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