This gist shows an autotask that can be used with OpenZeppelin Defender on the free tier without relayer

keeper_auto_task.js

// Settings edited by user
const YOUR_KEEP3R_ADDRESSS = "";
const YOUR_KEEP3R_PRIVATE_KEY = "";

// Code starts here
const { ethers } = require("ethers");
const privateKey = Buffer.from(YOUR_KEEP3R_PRIVATE_KEY, 'hex');

const UniswapOracleV2 = "UniswapOracleV2";
const HegicPoolKeep3r = "HegicPoolKeep3r";
const YearnV1EarnKeep3r = "YearnV1EarnKeep3r";

const abis = {
    UniswapOracleV2: [{"inputs":[{"internalType":"address","name":"_keep3r","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"KP3R","outputs":[{"internalType":"contract IKeep3rV1","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address","name":"tokenOut","type":"address"}],"name":"consult","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"granularity","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastUpdated","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"observationIndexOf","outputs":[{"internalType":"uint8","name":"index","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"pairObservations","outputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"uint256","name":"price0Cumulative","type":"uint256"},{"internalType":"uint256","name":"price1Cumulative","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pairs","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_governance","type":"address"}],"name":"setGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_keep3r","type":"address"}],"name":"setKeep3r","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"update","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"length","type":"uint256"}],"name":"updateFor","outputs":[{"internalType":"bool","name":"updated","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pair","type":"address"}],"name":"updatePair","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"updateable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"i","type":"uint256"},{"internalType":"uint256","name":"length","type":"uint256"}],"name":"updateableFor","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"updateableList","outputs":[{"internalType":"address[]","name":"list","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"windowSize","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"work","outputs":[],"stateMutability":"nonpayable","type":"function"}],
    HegicPoolKeep3r: [{"inputs":[{"internalType":"address","name":"_keep3r","type":"address"},{"internalType":"address","name":"_hegicPool","type":"address"},{"internalType":"uint256","name":"_minETHRewards","type":"uint256"},{"internalType":"uint256","name":"_minWBTCRewards","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DustSent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"rewards","type":"uint256"}],"name":"ForcedClaimedRewards","type":"event"},{"anonymous":false,"inputs":[],"name":"GovernorAccepted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"hegicPool","type":"address"}],"name":"HegicPoolSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"keep3r","type":"address"}],"name":"Keep3rSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"eth","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"wbtc","type":"uint256"}],"name":"LotsBought","type":"event"},{"anonymous":false,"inputs":[],"name":"ManagerAccepted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_minETHRewards","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_minWBTCRewards","type":"uint256"}],"name":"MinRewardsSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"pendingGovernor","type":"address"}],"name":"PendingGovernorSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"pendingManager","type":"address"}],"name":"PendingManagerSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"rewards","type":"uint256"}],"name":"RewardsClaimedByKeeper","type":"event"},{"inputs":[],"name":"ETH_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"HegicPool","outputs":[{"internalType":"contract IHegicPoolV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"acceptManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_eth","type":"uint256"},{"internalType":"uint256","name":"_wbtc","type":"uint256"}],"name":"buyLots","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"forceClaimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"governor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"keep3r","outputs":[{"internalType":"contract IKeep3rV1","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minETHRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minWBTCRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"sendDust","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_hegicPool","type":"address"}],"name":"setHegicPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_keep3r","type":"address"}],"name":"setKeep3r","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minETHRewards","type":"uint256"},{"internalType":"uint256","name":"_minWBTCRewards","type":"uint256"}],"name":"setMinRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_pendingGovernor","type":"address"}],"name":"setPendingGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_pendingManager","type":"address"}],"name":"setPendingManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"workable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}],
    YearnV1EarnKeep3r: [{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"BASE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"KP3R","outputs":[{"internalType":"contract IKeep3rV1","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IYERC20","name":"_token","type":"address"}],"name":"shouldRebalance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokens","outputs":[{"internalType":"contract IYERC20[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"work","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"workable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}],
}

class KeeperJob {
    constructor(name, addr, workableFunctionName, workFunctionName) {
        this.name = name;
        this.abi = abis[name];
        this.addr = addr;
        this.workableFunctionName = workableFunctionName;
        this.workFunctionName = workFunctionName;
    }
}

const jobs = [
    new KeeperJob(UniswapOracleV2, "0x127a2975c4E1c75f1ed4757a861bbd42523DB035", "updateable", "work"),
    new KeeperJob(HegicPoolKeep3r, "0x5DDe926b0A31346f2485900C5e64c2577F43F774", "workable", "claimRewards"),
    new KeeperJob(YearnV1EarnKeep3r,"0xe7F4ab593aeC81EcA754Da1B3B7cE0C42a13Ec0C", "workable", "work"),
]

// Entrypoint for the Autotask
exports.handler = async function(credentials) {
  const provider = ethers.getDefaultProvider('mainnet');
  const signer = new ethers.Wallet(privateKey, provider, { speed: 'fastest', YOUR_KEEP3R_ADDRESSS });

  for (var i = 0; i < jobs.length; i++)
  {
    const job = jobs[i];
    const contract = new ethers.Contract(job.addr, job.abi, signer);
    // Run work if needed
    if (await contract[job.workableFunctionName]()) {
        console.log(job.name + " workable");
        const tx = await contract[job.workFunctionName]();
        console.log(tx.hash);
    } else {
        console.log(job.name + " not workable");
    }
  }
}