Cloudflare

Host documentation at a /docs subpath using Cloudflare Workers

Create Cloudflare Worker

Navigate to the Workers & Pages > Create application > Create worker. You should be presented with the following screen where you can create a new Cloudlfare worker.

Keep in mind: If your DNS provider is Cloudflare you should not use proxying for the CNAME record

Add custom domain

Once the worker is created, click Configure worker. Navigate to the worker Settings > Triggers. Click on Add Custom Domain to add your desired domain into the list - we recommend you add both the version with and without www. prepended to the domain.

If you have trouble setting up a custom subdirectory, contact our support team and we’ll walk you through upgrading your hosting with us.

Edit Worker Script

Click on Edit Code and add the following script into the worker’s code.

Edit DOCS_URL by replacing [SUBDOMAIN] with your unique subdomain and CUSTOM_URL with your website’s base URL.

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

async function handleRequest(request) {
  try {
    const urlObject = new URL(request.url);
    // If the request is to the docs subdirectory
    if (/^\/docs/.test(urlObject.pathname)) {
      // Then Proxy to Mintlify
      const DOCS_URL = "[SUBDOMAIN].mintlify.dev";
      const CUSTOM_URL = "[YOUR_DOMAIN]";

      let url = new URL(request.url);
      url.hostname = DOCS_URL;

      let proxyRequest = new Request(url, request);

      proxyRequest.headers.set("Host", DOCS_URL);
      proxyRequest.headers.set("X-Forwarded-Host", CUSTOM_URL);
      proxyRequest.headers.set("X-Forwarded-Proto", "https");

      return await fetch(proxyRequest);
    }
  } catch (error) {
    // if no action found, play the regular request
    return await fetch(request);
  }
}

Click on Deploy and wait for the changes to propagate (it can take up to a few hours).