Use UrlSearchParams to ensure your code is readable

With JavaScript’s UrlSearchParams function, you can compose API calls that would be recognisable as a set of Postman key/value parameters. For example:

In Postman

In Postman

In JavaScript

const query = new URLSearchParams({
    client_secret: "ASECRETTHING",
    v: "20210201", // All Foursquare API calls need a version. See
    ll: position.coords.latitude + "," + position.coords.longitude, // User's latitude and longitude
    intent: "browse", // Find all venues with the defined 'radius' of 'll'
    radius: "10000", // Distance from starting point to search (metres)
    limit: "10", // Maximum number of values to return (up to 50)
    categoryId: "4d4b7105d754a06374d81259" // Search the 'Food' category. See the list of categories at
  fetch(API_URL + ENDPOINT + query, getOptions);

Something similar in an SDK (Google Places Library)

Often, a system’s SDK/API library is not as intuitive or broadly understood as a standard like Open API. With SDKs, you rely a little more on the developer documentation being easy to follow and consistently constructed.

// Find a food venue
function findRestaurant(location, name) {
  let restaurant_location = new Object (); =;
  restaurant_location.lng =location.lng;
  var request = {
    location: restaurant_location,
    radius: '500',
    name: name
  // Add food venue marker to Google map
  service = new google.maps.places.PlacesService(map);
  service.nearbySearch(request, addMarker);


The advantages of using a system’s provided SDK instead of a REST API (whether that be Open API, a Postman collection, or some other standard) are that it will:

  • Have no deployment issues (such as CORS)
  • Be faster
  • Be more conservative with its use of resources
  • Have more commands
  • Be free of any constraints imposed by a standard API specification.

However, if there is no SDK for your preferred development platform, a REST API may be your only option. For REST APIs, there’s also a significant advantage in the degree of clarity that comes from a standardised approach.