REST API Part 6

API Callout In Salesforce

So far you have seen how to create Salesforce API. Now, If we want to call an API of any external Application like Stripe, Hubspot, Google Sheets, or Google Slides from Salesforce.

To call an API in Salesforce, HTTP, HTTPRequest, and HTTPResponse classes are used. Here below is the code sample for API callout of currency conversion.

public static void callAPI() {
    // Instantiate a new Http object
    Http h = new Http();

     // Instantiate a new HTTP request, specify the method (GET) as well as the endpoint
    HttpRequest req = new HttpRequest();
     // Setting endpoint
    req.setEndpoint(url);
     // Setting Endpoint
    req.setMethod('GET');
     // Setting URL
    String url = 'https://currency-converter5.p.rapidapi.com/currency/convert?format=json&from=AUD&to=CAD&amount=1);
     // Setting Headers
    req.setHeader('X-RapidAPI-Key', 'Your X-RapidAPI-Key');
    req.setHeader('X-RapidAPI-Host': 'Your X-RapidAPI-Host');
    // Send the request, and return a response
    HttpResponse res = h.send(req);
}

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