How to integrate PostHog MCP with Atomic Agent

Connect Atomic Agent to PostHog MCP. List active feature flags and their rollout, summarize experiment results for signup flow, and more using natural language, with authentication handled for you.

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PostHog is a product analytics platform for tracking user behavior, feature flags, experiments, and errors. Use it to understand product metrics, validate features, and surface issues quickly.

1 Tools

Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including PostHog.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a PostHog account. See the Atomic Agent documentation for installation instructions.

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How Atomic Agent connects to PostHog

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect PostHog to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in PostHog. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your PostHog account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

What is the PostHog MCP server, and what's possible with it?

The PostHog MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your PostHog account. It provides structured and secure access to your product data, feature flags, experiments, and error tracking, so your agent can analyze user behavior, inspect feature flags, evaluate experiments, and investigate errors on your behalf.

  • Product usage analysis: Have your agent analyze PostHog product data to explain how people use your application.
  • Feature flag insights: Let the agent inspect your feature flags and answer questions about their configuration and usage.
  • Experiment analysis: Direct your agent to evaluate PostHog experiments and summarize their results.
  • Error investigation: Instruct your agent to review error tracking data and help identify recurring application issues.
  • PostHog knowledge queries: Have your agent consult available PostHog knowledge sources when answering questions about PostHog, your project, or company-specific knowledge.

Use PostHog from Atomic Agent

With your account connected, ask Atomic Agent to work with PostHog in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

Every PostHog MCP action and event your agent gets out of the box.

Exec

### PostHog knowledge sources Check the knowledge sources before you answer, but only for a request about PostHog itself, the user's PostHog project and its data, or company-specific knowledge such as internal terms, policies, or team decisions.

FAQ

Frequently asked questions

With a standalone PostHog MCP server, the agents and LLMs can only access a fixed set of PostHog tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from PostHog and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right PostHog tools.

Yes, absolutely. You can configure which PostHog scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your PostHog data and credentials are handled as safely as possible.

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