DataFast
Web analytics with revenue attribution over a remote MCP server (OAuth): ask about your visitors, top pages, traffic sources and revenue.
Hosted MCP Server
npx add-mcp 'https://datafast.app/api/mcp'Installs into Claude Code, Codex, Cursor and more
Documentation
Free until you are ready to connect revenue
Know what bringspaying customers
Connect website visits to completed payments. See which source, campaign, and landing page creates sales — then spend your time and budget on what works.
No credit card. Cookieless first-party tracking, with a session-only option.
Try it on your website
Check your analytics setup before signing up
Enter any public page. DataFast will inspect its HTML for common analytics tools and show a real result—free, with no account required.
Example revenue dashboard
Sample data
Visitors
12,847
Pageviews
34,291
Sales
327
Paying Sources
5
Revenue
$8,432
Top Sources
4,231$3,291
Twitter/X
2,847$1,832
ProductHunt
1,543$1,205
892$643
Direct
634$412
Top Pages
/8,432
/pricing4,291
/features2,143
/blog/seo-guide1,832
/signup1,205
Try the live demo — no signup required
<1KB
Gzipped Script
1 line
To Install
0
Cookies
$0
To Start
Start tracking in 2 minutes
Three steps. That's it.
Add the script
One line of code. Under 1KB gzipped. Loads in milliseconds.
<script defer src="https://datafast.app/js/script.js" data-website-id="YOUR_ID"></script>
2
Send completed payments
Use one server-side API call from Stripe, LemonSqueezy, Paddle, or your own checkout.
Revenue API
3
Grow with data
See which sources bring paying customers and invest in what works.
Answer the questions that change what you do next
Where did this sale come from?
Attribute Stripe revenue to the source and campaign that introduced the customer.
Which page creates customers?
Compare landing pages by revenue, not pageviews or bounce rate alone.
Where should I invest next?
Put more time and budget into channels with proven revenue per visitor.
DataFast FAQ
What is DataFast?
DataFast is a revenue-first web analytics tool for founders. It connects website visits to completed payments so you can see which source, campaign, and landing page creates paying customers instead of stopping at traffic counts.
Is DataFast free?
Yes. DataFast is free until you are ready to connect revenue, including 5,000 events per month with no credit card required. You only move to a paid plan when you start attributing completed payments.
How is DataFast different from Google Analytics?
DataFast is revenue-first. Instead of optimizing for clicks and pageviews, it connects website visits to completed payments so you can see which source, campaign, and landing page actually creates paying customers. The tracking script is under 1KB gzipped and it uses no cookies.
Does DataFast need a tracking script?
Yes, one line. You add a single script tag that is 652 bytes gzipped and loads asynchronously, so it stays out of your site's critical path. To attribute revenue you also make one server-side API call when a payment completes.
Is DataFast open source?
Yes. You can inspect the tracker and host the stack yourself when you need full data ownership.
Start tracking revenue today
Add one script tag. Send completed payments. See revenue per source.
5,000 events/month free. No credit card required.