# PHP curl call from localhost return UNAUTHENTICATED\_API\_CALL **URL:** \ **Category:** ⚙️ API\ **Created:** [July 12, 2022, 2:28pm UTC](https://community.rapyd.net/t/php-curl-call-from-localhost-return-unauthenticated-api-call/21827 "2022-07-12T14:28:28Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Community\_Team](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@Community\_Team](https://community.rapyd.net/u/Community_Team)\ **Post date:** [July 12, 2022, 2:52pm UTC](https://community.rapyd.net/t/php-curl-call-from-localhost-return-unauthenticated-api-call/21827/2 "2022-07-12T14:52:23Z")
Thanks @manoj, I know for when you use localhost for certain complete, cancel and error urls in the parameters, you will have to use [ngrok](https://ngrok.com/). [https://community.rapyd.net/t/complete-cancel-and-error-urls](https://community.rapyd.net/t/complete-cancel-and-error-urls) However this may be an issue due to the signature request. From the error response, this may be due to a couple things: 1. All spaces and other whitespace outside of strings must be removed. 2. Numbers should be sent in strings, not as integers/numbers. Here are some resources that may help: - [Rapyd API Request Signatures and How to Calculate](https://community.rapyd.net/t/rapyd-api-request-signatures-and-how-to-calculate/1256) - [Verify Webhook Signature? - #2 by Minh\_Nguy\_n\_Van](https://community.rapyd.net/t/verify-webhook-signature/1383/2) - [How to verify Webhook Signature with PHP script](https://community.rapyd.net/t/how-to-verify-webhook-signature-with-php-script/1382) - [Rapyd Integrations: How to Integrate Checkout into your Online Shopping Cart using Python - YouTube](https://youtu.be/yL5TK4JfP7s) I would also take a look around your body and and how it may not be parsed correctly. --- _[View the full topic](https://community.rapyd.net/t/php-curl-call-from-localhost-return-unauthenticated-api-call/21827)._