I want to make an Http Post request with Bearer Authentication to my api using my Arduino Mkr Wifi 1010, but I couldn't find the appropriate library to do something like this (code generated with one made with Postman):

    POST /api/v1/rilevamento/transaction/commit HTTP/1.1
Host: www.....:8082
Authorization: Bearer eyJhb.......
Content-Type: application/json
Content-Length: 233

    "id": 0,
    "dispositivo": "sesto",
    "nomeutente": "MyName",
    "cognomeutente": "MySurname",
    "mailutente": "[email protected]",
    "data": "2020-11-23T09:23:03.142+00:00",
    "temperatura": 37.5

Can you tell me where to find this library? I tried WifiNiNa httpClient, ArduinoHttpClient, HTTPClient and other but I couldn't get any response or even enter in the method of my api on debug.

1 Answer 1


The "Authorization" is simply an HTTP header. So add it in your request like:

http.addHeader("Authorization", token);

The value of "token" is just the string "Bearer " followed by your authorization string. Don't neglect the SPACE after the word "Bearer". It will look like:

"Bearer eyJhb......"

On the Arduino MKR WiFi 1010 you use the WiFiNINA library which is slightly different. Here is some example code:

  if (client.connect(server, 80)) {
    client.println("POST /test/post.php HTTP/1.1");
    client.println("Host: www.targetserver.com");
    client.println("Content-Type: application/x-www-form-urlencoded");
    client.print("Content-Length: ");

The variable authorizationHeader will have the "Authorization: Bearer xxxxx...." authorization string.

Or you can replace the client.println(authorizationHeader); by:

client.print("Authorization: Bearer ");

to avoid dealing with concatenations, etc.

client can be an instance of WiFiSSLClient which works with both WiFi101 and WiFiNINA.

  • I believe this is made with HTTPClient which is for ESP modules, can I use it with my MKR Wifi?
    – Riccardo
    Commented Nov 24, 2020 at 15:51
  • With the MKR WiFi 1010 you use the WiFiNINA library which is slightly different. I've updated my answer with the relevant details.
    – jwh20
    Commented Nov 24, 2020 at 17:18

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