Example Cloudflare Worker to batch requests.

worker.js

addEventListener('fetch', event => {
  event.respondWith(handle(event))
})

let batch = null;

/**
 * @param {FetchEvent} event
 */
async function handle(event) {
  let request = event.request
  let text = await request.text()

  if (batch === null) {
    console.log("starting new batch with:", text)
    batch = [text];

    // Asynchronously accumulate and send a batch.
    // event.waitUntil() tells Workers not to
    // cancel this process once the response is
    // returned.
    event.waitUntil(handleBatch());
  } else {
    console.log("adding to batch:", text)
    batch.push(text);
  }

  return new Response("accepted: " + text)
}

async function handleBatch() {
  await sleep(10000)
  let batchToSend = batch
  batch = null

  console.log("send batch:", batchToSend)
  // INSERT YOUR CODE TO HANDLE A BATCH HERE
}

function sleep(ms) {
  return new Promise(resolve => {
    setTimeout(resolve, ms)
  })
}