Vitrus analytics MCP server

Open-source, cookie-free web analytics. Every number carries the SQL that produced it — and an AI summary can't ship a number it can't prove. One process, on your own server.

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Quickstart

You need Bun 1.3 or newer. That is the whole list.

git clone https://github.com/Vitrus-Dev/vitrus && cd vitrus
bun install && bun run build:tracker
alias vitrus="bun $PWD/packages/cli/src/cli.ts"

vitrus init                                   # creates ./vitrus.db and a secret salt
vitrus site add "My site" example.com         # prints your script tag
VITRUS_PASSWORD="a long secret" vitrus start  # ingest + dashboard on http://localhost:3000

Then one line in your site's :

<script defer data-site="SITE_ID" src="https://YOUR-HOST/v.js"></script>

No Docker Compose file, no database server, no migration step. Rather not run it? app.vitrus.dev is the same engine, hosted, with a free plan — and the live demo opens the full hosted dashboard on sample data, no account needed.

Every number opens the query that made it

Click a figure and you get the SQL that ran, its parameters, the window and the result — not a description of the number, the number's origin. It is the same evidence the AI summary is checked against.

That matters more now that models write the reports. When an AI-written sentence contains a number that is not in the evidence, Vitrus drops the sentence before it reaches you:

Visitors are down 18% against the previous period. [e1]
The drop coincides with the last deploy. [e1, e7]
✗ dropped: "The new theme caused a 41.7% fall in conversion."
   → 41.7 is in no evidence record, and "caused" is a claim nobody can make from this data.

A whole analytics product

Shortened. The full README is on GitHub.