I try to do callout to my apex rest service from first to second dev org, but got CalloutException

Question

String endPoint = 'https://wise-otter-ngj5eu-dev-ed.salesforce.com/services/apexrest/v1/getAccounts/';
Http h2 = new Http();
HttpRequest req1 = new HttpRequest();
req1.setHeader('Authorization','Bearer ' + accessToken);
req1.setHeader('Content-Type','application/json');
req1.setHeader('accept','application/json');
req1.setMethod('GET');
req1.setEndpoint(endPoint);
HttpResponse res1 = h2.send(req1);

String trimmedResponse = res1.getBody().unescapeCsv().remove('\\');
system.debug('@@@RESPONSE@@'+trimmedResponse);

Error on line 10, column 1: System.CalloutException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 503 Service Unavailable" AnonymousBlock: line 10, column 1

Postman works fine, but I cant do the same with apex

Answer 1

The endpoint on the code is missing .my. between the dev-ed and salesforce.

From https://wise-otter-ngj5eu-dev-ed.salesforce.com to https://wise-otter-ngj5eu-dev-ed.my.salesforce.com.

So, replace the endpoint into the code to:

String endPoint = 'https://wise-otter-ngj5eu-dev-ed.my.salesforce.com/services/apexrest/v1/getAccounts/';