How to integrate PostHog MCP with Hermes

Connect Hermes 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

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your PostHog account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

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What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating PostHog with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to PostHog

Ask your agent to connect to PostHog, or simply request any PostHog-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new PostHog connection.


Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to PostHog or request any PostHog-related task. It will prompt you to authenticate and authorize access.

5. Done!

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.

Way Forward

With PostHog connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

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. Hermes 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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