MCP Analytics in PostHog Web

Use the PostHog web app to explore MCP tool usage. After your server sends events, open MCP Analytics. The views use $mcp_tool_call events to show dashboards, sessions, tool quality, and intent clusters.

Before you start

1. Install MCP Analytics – install the SDK in your MCP server so tool calls are captured.
2. Open the web app – no install needed, just sign in to PostHog.

What you can do here

Each tab answers a different question.

Dashboard

The dashboard shows session counts, tool calls, error rates, and p95 latency. It also shows clients, harnesses, tool usage, and errors over time.

Activity

The activity feed shows tool calls as they arrive. Use it to check instrumentation or observe a release.

Sessions

The sessions view lists MCP sessions, with notable sessions first. Open a session to read its tool calls, intents, and errors in order. This is similar to Session Replay for agents. Apply filters to create a playlist, then move between sessions in the detail view.

Tool quality

Per-tool stats: call volume, error rate, latency, and the failure modes behind them. Select a tool to inspect its failed calls and error details.

Select Create fix task to start a coding agent for a failing tool. Choose the repository where the agent works. The agent opens a pull request. This uses the same process as a Self-driving report for a server you own.

The button requires a connected GitHub integration. See PostHog Desktop for the full process.

Intent clustering

Groups what agents said they were trying to do into themes, so you can see the jobs your server actually gets used for. Includes a journey view of how agents move between tools within a cluster. Intent comes from $mcp_intent plus generated session summaries.

Ask PostHog AI

PostHog AI can query this data in the web app. Ask it to explore sessions, inspect tool quality, analyze intent clusters, or suggest tool improvements. Select Ask PostHog AI in a view to open it with a relevant question.

Build your own views

Every signal is a normal PostHog event, so you aren't limited to these tabs. Query $mcp_* events in product analytics, the SQL editor, and dashboards. See sample queries for recipes.

Related

• Query the same data from your editor over MCP.
• Pull it into your own systems with the API.
• Find the properties for each event in the event reference.