posthog-mcp MCP server “This is not a read-only tool, and its reach is exactly the scopes of the personal API key you hand it. Of its 44 tools, 26 read and 18 write, and 5 of those delete production objects (delete-feature-flag, insight-delete, dashboard-delete, experiment-delete, survey-delete). The safety is real and server-enforced: every tool declares its required_scopes and PostHog checks them, so a key minted with only :read scopes mechanically blocks every write and delete. So mint one that way. Create a read-scoped personal API key unless you specifically want an agent creating feature flags in your live project. Second thing to know: the default install points at https://mcp.posthog.com/mcp, a hosted Cloudflare Worker, so your key and query results transit PostHog's own infrastructure (you already trust them with this data, and you can self-host by pointing POSTHOG_BASE_URL at your own worker). Two smaller notes: the docs-search tool sends your question to api.inkeep.com, a third party, and the server reports its own tool-call usage back to PostHog via posthog-node. No filesystem access, no other egress.”