# Response 415 from Timeline Event API **URL:** \ **Category:** APIs & Integrations\ **Tags:** developer-preview\ **Created:** [September 25, 2018, 10:33am UTC](https://community.hubspot.com/t/response-415-from-timeline-event-api/11342 "2018-09-25T10:33:59Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![system](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/system/32/124_2.png) [@system](https://community.hubspot.com/u/system)\ **Post date:** [September 25, 2018, 10:33am UTC](https://community.hubspot.com/t/response-415-from-timeline-event-api/11342/1 "2018-09-25T10:33:59Z")
Hi Anybody can you please tell me what the meaning of 415 response from api? In response body and header is empty. so not understanding what the issue in my request. ---
**Author:** ![cbarley](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/cbarley/32/82559_2.png) [@cbarley](https://community.hubspot.com/u/cbarley)\ **Post date:** [September 26, 2018, 2:53pm UTC](https://community.hubspot.com/t/response-415-from-timeline-event-api/11342/2 "2018-09-26T14:53:34Z")
Hi [@saiful](https://community.hubspot.com/u/saiful), 415 responses usually indicate unsupported media types, which often arise from the lack of appropriate Headers set. Make sure you have those present. That said, that was just my gut feeling on this - I’ll need your App ID, and an example of a contact where you expect a timeline event to be created in order to dig into this ---
**Author:** ![system](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/system/32/124_2.png) [@system](https://community.hubspot.com/u/system)\ **Post date:** [September 27, 2018, 10:25am UTC](https://community.hubspot.com/t/response-415-from-timeline-event-api/11342/3 "2018-09-27T10:25:10Z")
Hi [@Connor\_Barley](https://community.hubspot.com/u/connor_barley), Thanks for your reply. That issue already has been solved.