title: How to get the value of a JSON key using Postman?
body: <p>I have an API that returns JSON. Using Postman, I want to send a <code>GET</code> request that returns the value of a key.</p>
  
  <p><code>GET http://localhost/user/1</code> will return:</p>
  
  <pre><code>{
      "firstName": "First",
      "lastName": "Last",
  }
  </code></pre>
  
  <p>I've tried...</p>
  
  <p><code>GET http://localhost/user/1.firstName</code>
  or
  <code>GET http://localhost/user/1:firstName</code>:</p>
  
  <pre><code>{
      "error": "E_UNKNOWN",
      "status": 500,
      "summary": "Encountered an unexpected error",
      "raw": {
          "code": "ER_BAD_FIELD_ERROR",
          "errno": 1054,
          "sqlState": "42S22",
          "index": 0
      }
  }
  </code></pre>
  
  <p><code>GET http://localhost/user/1?firstName</code> will return:</p>
  
  <pre><code>{
      "firstName": "First",
      "lastName": "Last",
  }
  </code></pre>
  
  <p>I want to send something like <code>GET http://localhost/user/1?firstName</code> that returns:</p>
  
  <pre><code>{
      "firstName": "First"
  }
  </code></pre>
  
  <p>Is this possible? Thanks for your help.</p>