posthog_query

Run an ad-hoc HogQL (SQL) query against a PostHog project's events.

SERVERUnClick SOURCE@unclick/mcp-server

High RISK CLASS

Category Execute

Parameters 42 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/posthog-query.md

WHAT IT DOES

What posthog_query does on UnClick

AI agents invoke posthog_query to trigger actions in UnClick. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

Parameter	Type	Required	Description
`host`	string	—	PostHog host (default https://us.posthog.com)
`query`	string	Yes	HogQL/SQL query (e.g. select count() from events)
`api_key`	string	Yes	PostHog Personal API key
`project_id`	string	—	PostHog project id (can be a saved default)

Parameters from the server's own tool schema.

RISK

Why posthog_query is rated High

This tool executes arbitrary SQL-like queries against a PostHog project. While the primary use case is reading analytics data, the ability to run ad-hoc HogQL/SQL queries means it could execute complex or destructive operations depending on what HogQL supports.

From the tool's definition "Run an ad-hoc HogQL (SQL) query against a PostHog project's events"

Risk signalsAccepts URL/endpoint input (host) · Handles credentials or secrets (api_key)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs posthog_query safely

PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For posthog_query, this is the rule to start with:

posthog_query Rate-limited

posthog_query stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "posthog_query": {
      "limits": [
        {
          "counter": "posthog_query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every posthog_query call is checked against it from then on.

FAQ

Questions about posthog_query

What does the posthog_query tool do? +

Run an ad-hoc HogQL (SQL) query against a PostHog project's events. It is categorised as a Execute tool in the UnClick MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does posthog_query accept? +

posthog_query accepts 4 parameters: host, query, api_key, project_id. Required: query, api_key. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on posthog_query? +

Register the UnClick MCP server in PolicyLayer and add a rule for posthog_query: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches UnClick. Nothing to install.

What risk level is posthog_query? +

posthog_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit posthog_query? +

Yes. Add a rate_limit block to the posthog_query rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block posthog_query completely? +

Set action: deny in the PolicyLayer policy for posthog_query. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides posthog_query? +

posthog_query is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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