- Log into your Salesforce organization and click on the Gear icon in the upper right corner and select Setup.
- In the left menu select Settings > Security > Remote Site Settings or just type Remote Site Settings in the search bar. Remote Site Settings section will appear.
- Click on the New Remote Site button.
- Fill in fields Remote Site Name and Remote Site URL (Please see figure 4b).
Then click Save button.
You can find Remote Site URL here