Setup a free openai api proxy with cloudflare workers

worker.js

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

async function handleRequest(request) {
  const url = new URL(request.url)
  url.hostname = 'api.openai.com'
  const modifiedRequest = new Request(url.toString(), {
    headers: request.headers,
    method: request.method,
    body: request.body,
    redirect: request.redirect
  })
  return await fetch(modifiedRequest)
}