Create a CloudWatch Events scheduled rule using an Amazon SDK

    public static void putCWRule(CloudWatchEventsClient cwe, String ruleName, String roleArn) {

        try {
            PutRuleRequest request = PutRuleRequest.builder()
                .name(ruleName)
                .roleArn(roleArn)
                .scheduleExpression("rate(5 minutes)")
                .state(RuleState.ENABLED)
                .build();

            PutRuleResponse response = cwe.putRule(request);
            System.out.printf(
                    "Successfully created CloudWatch events rule %s with arn %s",
                    roleArn, response.ruleArn());

        } catch (
            CloudWatchException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Create the client in a separate module and export it.

import { CloudWatchEventsClient } from "@aws-sdk/client-cloudwatch-events";
// Set the AWS Region.
const REGION = "REGION"; //e.g. "us-east-1"
// Create an Amazon CloudWatch service client object.
export const cweClient = new CloudWatchEventsClient({ region: REGION });

Import the SDK and client modules and call the API.

// Import required AWS SDK clients and commands for Node.js
import { PutRuleCommand } from "@aws-sdk/client-cloudwatch-events";
import { cweClient } from "./libs/cloudWatchEventsClient.js";

// Set the parameters
export const params = {
  Name: "DEMO_EVENT",
  RoleArn: "IAM_ROLE_ARN", //IAM_ROLE_ARN
  ScheduleExpression: "rate(5 minutes)",
  State: "ENABLED",
};

export const run = async () => {
  try {
    const data = await cweClient.send(new PutRuleCommand(params));
    console.log("Success, scheduled rule created; Rule ARN:", data);
    return data; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
// Uncomment this line to run execution within this file.
// run();

// Load the AWS SDK for Node.js
var AWS = require('aws-sdk');
// Set the region 
AWS.config.update({region: 'REGION'});

// Create CloudWatchEvents service object
var cwevents = new AWS.CloudWatchEvents({apiVersion: '2015-10-07'});

var params = {
  Name: 'DEMO_EVENT',
  RoleArn: 'IAM_ROLE_ARN',
  ScheduleExpression: 'rate(5 minutes)',
  State: 'ENABLED'
};

cwevents.putRule(params, function(err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data.RuleArn);
  }
});