Prerequisite: Your primary domain (company.com) is hosted on Cloudflare.

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Create Cloudflare Worker

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

Create a Cloudflare worker

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Add custom domain

Once the worker is created, navigate to the worker settings and then Triggers > Custom Domains. Click on Add Custom Domain to then add your following domains into the list.

Cloudflare worker custom domain

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

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Edit Worker Script

Click on Quick edit 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);
  }

  return await fetch(request);
}

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

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Reach out to Mintlify team

Once completing the Cloudflare setup, the Mintlify team will setup the subdirectory settings in your deployment. Reach out over email or in our community.

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