How do I fix 40ants-mcp quickload errors in Common Lisp?

Load :jsonrpc first: (ql:quickload :jsonrpc) then (ql:quickload :40ants-mcp). Ultralisp dist required.

What's MCP and why use Common Lisp for servers?

Model Context Protocol — tools for AI models. Lisp: macros, restarts make strong servers; beats Python fragility.

Yes, but Roswell scripts executables easily. SBCL image works, less portable.

SBCL crashes. Dependencies mock you. Building an MCP server in Common Lisp shouldn't feel like medieval torture — but it does, until now.

theAIcatchup Apr 11, 2026 4 min read

Load jsonrpc before 40ants-mcp to avoid install hell. 𝕏
Common Lisp's macros make MCP tools dynamic and restartable — a hidden edge over Python. 𝕏
Full setup: SBCL, Roswell, Quicklisp, Ultralisp; Roswell script for easy deployment. 𝕏

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#40ants-mcp #Common Lisp #MCP server #Model Context Protocol

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Originally reported by Dev.to