Liminality
Breaks complex questions into sub-questions with tools. Liminality is a Model Context Protocol (MCP) server maintained by Physea. It connects to MCP-compatible clients such as Claude Desktop, Cursor, Cline, and other agents that speak the protocol. It is categorized under AI/Reasoning, AI/Workflow and Tool/Server.
What is this MCP
Liminality is a hosted MCP server that decomposes complex questions, decisions, or multi-step tasks into their constituent sub-questions. It grounds each sub-question to appropriate tools or endpoints and provides a reusable, scored route that can be executed and verified.
How to use this MCP
Connect to the MCP server athttps://liminality.physea.ai/mcp using either X-API-Key header authentication or OAuth 2.1. The first 50 solves on any API key are free. The server accepts complex queries and returns structured routes with tool bindings for each sub-question component.
What this MCP can be used for
This MCP excels at multi-step reasoning tasks, decision analysis, and complex problem-solving where breaking down a problem into actionable steps is valuable. It's particularly useful for repeated agent workflows where solved routes can be stored and replayed, reducing costs over time. It's less beneficial for simple single-lookup queries where direct tool access would suffice.
AIMCP authority
DR and traffic signal for the AIMCP public domain.
Frequently asked questions
What is the Liminality MCP server?
Liminality is a Model Context Protocol server from Physea. It lets MCP-compatible AI clients call its tools over a standard interface, so agents like Claude, Cursor, and Cline can use it without custom integration.
How do I connect Liminality to my AI client?
Add Liminality to your MCP client configuration (Claude Desktop, Cursor, or Cline) as a stdio or SSE server, then restart the client so it picks up the new server.
Is Liminality free to use?
Liminality is listed on AIMCP for free. Any API keys or accounts required by the underlying service are set by its provider.
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