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Step 1: Create an API Key

Create an API key in Promptwatch. Go to Settings → API Keys in your Promptwatch dashboard.

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Step 2: Create a Worker

Create a new Cloudflare Worker in your account:
  1. Go to your Cloudflare dashboard → Workers & Pages
  2. Click Create Worker
  3. Give it a name (e.g., promptwatch-analytics)
  4. Replace the default code with the script below

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Step 3: Worker Script

Copy the following script and paste it into the Cloudflare Worker editor: 
/**
 * Cloudflare Worker - stream page views to analytics server
 *
 * Sends JSON in the expected crawler logs schema.
 * Content type filtering is handled server-side.
 */
export default {
  async fetch(request, env, ctx) {
    const { pathname, search } = new URL(request.url);

    // 1. Make the upstream request (cache/origin)
    const response = await fetch(request);
    
    const contentType = response.headers.get("content-type")?.split(";")[0];
    const queryString = search.startsWith("?") && search.length > 1 ? search.slice(1) : null;

    // 2. Build the log object
    const log = {
      timestamp: new Date().toISOString(),
      status_code: response.status,
      request_method: request.method,
      request_path: pathname,
      query_string: queryString,
      content_type: contentType,
      client_ip: request.headers.get("CF-Connecting-IP") || null,
      hostname: request.headers.get("Host") || null,
      user_agent: request.headers.get("User-Agent") || null,
      referrer: request.headers.get("Referer") || null,
    };

    // 3. Fire-and-forget upload - never delays the visitor
    ctx.waitUntil(
      fetch(env.ANALYTICS_ENDPOINT, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          "X-API-Key": env.ANALYTICS_KEY,
        },
        body: JSON.stringify(log),
      }).catch(() => {}), // swallow network errors
    );

    return response;
  },
};

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Step 4: Environment Variables

In your Worker settings, add these environment variables: 
ANALYTICS_ENDPOINT=https://logs.promptwatch.com/event
ANALYTICS_KEY=YOUR_API_KEY
Replace YOUR_API_KEY with your actual API key.

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Step 5: Deploy to a Route

Deploy your Worker to a route:
  1. Go to your domain’s Workers Routes in Cloudflare
  2. Add a new route: yourdomain.com/*
  3. Select your Worker from the dropdown
  4. Save and deploy
The Worker will intercept all requests to your domain. It transparently passes through all traffic while logging HTML page views to Promptwatch.

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Step 6: Finish

Once deployed, your Worker will automatically send crawler logs to Promptwatch.