What it does

Pageviews bucketed by viewport width: mobile_xs (<480), mobile (<768), tablet (<1024), desktop (<1440), desktop_xl (≥1440). Each row carries `percentage`, a percentage of all human pageviews in the period: 58.3 means 58.3%. Real usable viewport, not screen resolution.

Example prompts

Ask Claude (or any MCP client connected to mcp-analytics) something like:

Mobile vs desktop on mysite.com — what's the breakdown?

The client will pick viewport_breakdown automatically based on the prompt and your account's available sites.

Arguments

Name Type Required Description / Default
site_id string required Site identifier from list_sites (8-character base32, e.g. 'wjxayhdd').
period string optional Time window. Keywords: today, yesterday, last_7_days, last_30_days, last_90_days, last_12_months. Or a custom date range YYYY-MM-DD..YYYY-MM-DD (inclusive).
default: last_7_days
conversion_event string optional Optional custom event name (case-sensitive, from list_events) to treat as the conversion. Each row then gains conversion_base (units in that row), converted (how many of them fired the event anywhere in the period) and conversion_rate (ratio 0–1: 0.05 means 5%; null when no unit is attributed to the row: it has no browser sessions/visitors at all, e.g. purely server-ingested traffic, or — on privacy_mode=all sites in top_referrers/top_sources/top_entry_pages — the row was never any visitor's first entry in the period, even though it has sessions). The response gains a site-wide `conversion` block: conversion_base (units in the period), converted (how many fired the event), conversion_rate (ratio 0–1: 0.05 means 5%), `unit` and a `note` to relay. Use it to compare conversion rates between rows — absolute counts alone favour whatever row has the most traffic. The unit depends on the site's privacy_mode: 'session' on strict and balanced sites (no identity survives UTC midnight there, so only conversions within one visit count), 'visitor' on privacy_mode=all sites (first-party cookie, so a visitor who arrives Monday and converts Thursday counts as converted, if both days are inside the period). The auto-tracked 'pageview' and 'engagement' are rejected — pick one of the site's own events.

How to call it directly

If you're integrating from your own code rather than a chat client, this is the JSON-RPC payload:

curl -X POST https://mcp-analytics.com/mcp \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "viewport_breakdown",
    "arguments": {
      "site_id": "abc12345"
    }
  }
}'

Token comes from /settings after you sign up. Replace any required arguments above.

Related tools

  • get_timeseries: Time-bucketed metric over a period.
  • top_pages: Most-viewed URL paths.
  • list_sites: List all sites on the authenticated account.
  • breakdown: Breakdown of visits by browser, os, device_type, or country (country empty in MVP).
  • remove_site: Soft-delete a site.