SSJS: Retrieve AccessToken in Salesforce

Step By Step process to generate Access Token in Salesforce

1. Go to setup

2. Quick Find: App

3. Click on External Client App Manager

4. Click New

5. Enter below details

   1. External Client App Name : DataCloudAPIMyScript

   2. API Name: DataCloudAPIMyScript

   3. Distribution State: Local

6. OAuth Setting

   1. Callback URL: http://localhost:1717/OauthRedirect

   2. OAuth Scopes: You can select all for safer side

   3. Flow Enablement

      1. Select Enable Client Credentials flow

   4. Security

      1. Select Required scerect for Web Server Flow

      2. Require secret for Refresh Token flow

7. Policies

   1. Permitted Users: All users can self-authorize

   2. Oauth Flows and External Client App Enhancement

      1. Enable Client Credentials flows

      2. Run as Give <username>

      3. Refresh Token Policy

         1. Expire refresh token after specific time

Postman Curl

curl --request POST \

  --url "https://<your-mydomain>.my.salesforce.com/services/oauth2/token" \

  --header "Content-Type: application/x-www-form-urlencoded" \

  --data-urlencode "grant_type=client_credentials" \

  --data-urlencode "client_id=<your_consumer_key>" \

  --data-urlencode "client_secret=<your_consumer_secret>"

SSJS Code

<script runat="server">

Platform.Load("Core", "1.1.1");

try {

    // 🔹 Config (replace with your actual values)

    var tokenUrl = "https://<your-mydomain>.my.salesforce.com/services/oauth2/token";

    var clientId = "<your_consumer_key>";

    var clientSecret = "<your_consumer_secret>";

    // 🔹 Prepare payload (x-www-form-urlencoded)

    var payload = "grant_type=client_credentials" +

                  "&client_id=" + clientId +

                  "&client_secret=" + clientSecret;

    // 🔹 HTTP Request

    var req = new Script.Util.HttpRequest(tokenUrl);

    req.emptyContentHandling = 0;

    req.retries = 2;

    req.continueOnError = true;

    req.method = "POST";

    req.contentType = "application/x-www-form-urlencoded";

    req.postData = payload;

    // 🔹 Send request

    var response = req.send();

    // 🔹 Response Handling

    var statusCode = response.statusCode;

    var responseBody = response.content;

    // 🔹 Logging (you can store this in DE as well)

    Write("<br><b>Status Code:</b> " + statusCode);

    Write("<br><b>Response:</b> " + String(responseBody));

    // Optional: Parse JSON response

    if (statusCode == 200) {

        var jsonResponse = Platform.Function.ParseJSON(String(responseBody));

        var accessToken = jsonResponse.access_token;

        Write("<br><b>Access Token:</b> " + accessToken);

    } else {

        Write("<br><b>Error Occurred while fetching token</b>");

    }

} catch (e) {

    // 🔹 Error Logging

    Write("<br><b>Exception:</b> " + String(e));

}

</script>