# Can I use drop in API Components in client side (ReactJs) directly? CORS Policy Error **URL:** https://discuss.dwolla.com/t/can-i-use-drop-in-api-components-in-client-side-reactjs-directly-cors-policy-error/7812 **Category:** API Support **Created:** [February 7, 2022, 1:26pm UTC](https://discuss.dwolla.com/t/can-i-use-drop-in-api-components-in-client-side-reactjs-directly-cors-policy-error/7812 "2022-02-07T13:26:10Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![spencer](https://sea2.discourse-cdn.com/dwolla/user_avatar/discuss.dwolla.com/spencer/32/2143_2.png) [@spencer](https://discuss.dwolla.com/u/spencer) #### Post date: [February 8, 2022, 5:26pm UTC](https://discuss.dwolla.com/t/can-i-use-drop-in-api-components-in-client-side-reactjs-directly-cors-policy-error/7812/2 "2022-02-08T17:26:10Z")
Hi @Ank , this looks to be the same error response as the thread below. Please let us know if you have any follow up questions after reviewing! > [@CORS header missing on HTTP 201 response](https://discuss.dwolla.com/t/cors-header-missing-on-http-201-response/7817/2): > > Hi @mikewhat , Dwolla’s API blocks CORS requests for security purposes. Referenced in this thread: [Dwolla.post giving me a CORS error - #2 by shreya](https://discuss.dwolla.com/t/dwolla-post-giving-me-a-cors-error/7652/2) I’d recommend either moving these calls to your back-end server or utilize our [drop-in components library](https://developers.dwolla.com/concepts/drop-in-components) which is allows you to utilize pre-built UI components to make isolated calls to Dwolla. --- _[View the full topic](https://discuss.dwolla.com/t/can-i-use-drop-in-api-components-in-client-side-reactjs-directly-cors-policy-error/7812)._