FIVE Persona Engine is a Model Context Protocol (MCP) server: 160K deductive JSON persona constraints. 0 drift breaks in 120 turns. Free API, no key. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.
It runs locally: the Python package five-mcp (via uvx) speaks MCP over stdio on your machine. No credentials are required — it works out of the box. The current release is v1.1.1.
You'll find FIVE Persona Engine in the Development category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain FIVE Persona Engine for kiro0x, claim this listing to verify ownership, earn the Verified badge, and keep the details current.