MCP-Mirror/JohanCodinha_nrepl-mcp-server
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A Model Context Protocol (MCP) server designed for MCP clients, such as Claude Desktop or CLine in VSCode, enabling interaction with a running Clojure nREPL instance.
Tools
Functions exposed to the LLM to take actions
connect
Connect to an nREPL server. Example: (connect {:host "localhost" :port 1234})
eval_form
Evaluate Clojure code in a specific namespace or the current one. Examples:
- Get current namespace: (eval_form {:code "(str ns)"})
- Change namespace: (eval_form {:code "(+ 1 2)" :ns "my.namespace"})
- Load a file: (eval_form {:code "(load-file "src/my_file.clj")"})
- Define and call functions: (eval_form {:code "(defn add [a b] (+ a b))" :ns "math"} then (eval_form {:code "(add 1 2)" :ns "math"})
get_ns_vars
Get all public vars (functions, values) in a namespace with their metadata and current values. Example:
- List main namespace vars: (get_ns_vars {:ns "main"}) Returns a map where keys are var names and values contain:
- :meta - Metadata including :doc string, :line number, :file path
- :value - Current value of the var
Prompts
Interactive templates invoked by user choice
No prompts
Resources
Contextual data attached and managed by the client
nREPL Connection Status
URI: nrepl://status
MIME: application/json
Returns the current nREPL connection status including port and session information
Project Namespaces
URI: nrepl://namespaces
MIME: application/json
Returns a list of all namespaces in the current project
