AI Developer Tool / MCP Server

An MCP server that gives agents a sandboxed Lisp REPL

A blog post describing ptc_runner’s MCP server and code-mode approach, where agents run short-lived untrusted programs inside a small Lisp REPL instead of Python or JavaScript.

Clear22/30
Useful24/30
Specific16/20
Complete16/20
An MCP server that gives agents a sandboxed Lisp REPL screenshot

Why it was accepted

The page clearly describes an AI-adjacent developer tool: an MCP server for agent code execution. It explains the purpose, the sandbox model, the Lisp-based execution environment, and how clients can use the server via tools like lisp_eval. There is enough visible detail to support a useful public listing.

Weakness

The snapshot does not show installation steps, supported clients beyond general MCP compatibility, pricing/licensing, or a complete command/config example. The visible example also cuts off before showing the full code mode flow.

Review status

25 days ago #587 ↑ +6

Last evaluated 25 days ago. Current rank #587. Up 6 spots in the rankings.

Score history

78

Related listings

state-harness screenshot
89

AI Developer Tool / LLM Agent Monitoring

Runtime safety net for LLM agents that detects runaway token growth, classifies failure patterns, and suggests fixes without extra LLM calls. The project includes a Rust core, Python SDK, examples, benchmarks, and benchmark claims across multiple models and runs.

OpenWorkers screenshot
87

AI Developer Tool / Research Assistant

OpenWorkers is a thesis-focused research assistant that searches literature, verifies citations, critiques ideas, and produces structured research support without writing the prose for the student.

Raidho screenshot
#233 Raidho
85

AI Developer Tool / Coding Agent

Raidho is an open-source coding agent that separates planning and execution across different model providers and adds durable VSA-based memory across runs. The repo includes install steps, provider options, CLI usage, and benchmark evidence.

Klent screenshot
#251 Klent
85

AI Developer Tool / Agent Guardrails

Klent is an AI agent guardrails product that sits between agents and their tools, letting teams allow, deny, pause, rewrite, or redirect tool calls with policies, human approval flows, and audit trails.