For developers

Web analytics built for developers

A light asynchronous script, events from your code, JavaScript errors and Core Web Vitals, and your data available through a REST API and an MCP server.

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Errors and performance of real users

JavaScript errors with message, file and line, and Core Web Vitals by page and device, from your real visitors.

JavaScript errors with file, line and stack
LCP, INP, CLS, FCP and TTFB
By page, browser and device

Events from your code

Call _ovt('key') when something happens in your app and it becomes a goal with source, campaign and value.

One function, no SDK
Single-page apps measured automatically
Your own domain for the script

API and MCP

Read your metrics in JSON from your scripts, or ask your assistant in Claude Code or Cursor.

REST API with the same filters as the panel
MCP server with 15 tools
Tokens you can regenerate at any time

Integrations

Frequently asked questions

Do I need an SDK?

No. One script tag and, if you want events, a global function: _ovt().

Does it work with React, Vue, Next.js or Astro?

Yes. Page changes through the browser history count as page views.

Is there an API rate limit?

The REST API accepts up to 2 requests per second per token. The MCP server has no limit.

Any MCP client

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Start measuring in 5 minutes

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