nREPL MCP Server
MCP server providing access to a running nREPL (network REPL) server for Clojure. Enables AI agents to evaluate Clojure expressions, inspect runtime state, call functions, and interact with a live Clojure environment through the nREPL protocol — enabling AI-assisted Clojure development and runtime analysis.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Full JVM code execution. Development only. nREPL network access must be restricted. Never expose on production.
⚡ Reliability
Best When
A Clojure developer using nREPL-based interactive development wants AI agents to assist with coding, debugging, and runtime exploration through the nREPL connection.
Avoid When
You don't use Clojure. Also: providing agents access to a production nREPL is a significant security risk — use development/staging environments only.
Use Cases
- • Evaluating Clojure code expressions in a live REPL from coding agents
- • Inspecting runtime state and data structures from Clojure debugging agents
- • Running Clojure tests and analyzing results from development agents
- • Interactive Clojure development with AI assistance through live REPL access
Not For
- • Teams not using Clojure (language-specific tool)
- • Production runtime access without strict sandboxing (REPL has full runtime access)
- • ClojureScript development (nREPL is primarily for JVM Clojure)
Interface
Authentication
No authentication for nREPL connection — security depends on nREPL server configuration and network access. Use SSH tunnels for remote nREPL.
Pricing
Free open source. nREPL is free and part of Clojure ecosystem.
Agent Metadata
Known Gotchas
- ⚠ nREPL provides FULL Clojure runtime access — only use in development environments
- ⚠ Long-running evaluations can block nREPL session — implement timeouts
- ⚠ Clojure's dynamic nature means agents can modify runtime state — use carefully
- ⚠ nREPL port should never be exposed on production systems without strong auth
Alternatives
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Scores are editorial opinions as of 2026-03-07.