Apex Callout

In plain words: External API integration in Lightning Web Components (LWC) allows Salesforce components to send requests to third-party web services—such as toll calculation, mapping, or payment gateways. In Salesforce, you can invoke external endpoints either directly from JavaScript using the browser's fetch() API (with CSP Trusted Sites enabled) or securely through an Apex callout using Named Credentials . Connecting Salesforce applications with external web services is a core requirement in logistics, fleet management, and finance. For instance, querying a toll calculation service allows transportation teams to estimate route costs dynamically from an Account or Work Order page. Below, we break down how to configure network permissions and execute external API requests cleanly from an LWC component.