What API or protocol was used to integrate your service with marketplace platforms in your previous company?

In the previous company, RESTful API was used for integrating the service with marketplaces, as most platforms provide such an interface.

Main features of the integration:

• Use of HTTP methods (GET, POST, PUT, DELETE) for interacting with marketplace resources.
• Authentication via OAuth 2.0 or API keys.
• Handling of JSON or XML data formats.
• Implementation of the client-side in Java using libraries for HTTP requests, such as Spring RestTemplate or HttpClient.

Example of a request to get a list of products:

RestTemplate restTemplate = new RestTemplate();
String url = "https://api.marketplace.com/v1/products";
HttpHeaders headers = new HttpHeaders();
headers.set("Authorization", "Bearer " + accessToken);
HttpEntity<String> entity = new HttpEntity<>(headers);

ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);
String productsJson = response.getBody();

This approach provided reliable and scalable integration with external services.