// MCP TOOL REFERENCE

MCX (MODULAR CODE EXECUTION) TOOLS

18 tools from the MCX (Modular Code Execution) MCP Server, categorised by risk level.

View the MCX (Modular Code Execution) policy →

// ALL 18 MCX (MODULAR CODE EXECUTION) TOOLS

READ 11 tools

Read mcx_fetch Fetch URL, convert to markdown, index in FTS5, and optionally search. Caches 24h - same URL returns cached ... Read mcx_file Process file with code. File content available as $file. Supports fuzzy paths - partial names are resolved... Read mcx_find Fast fuzzy file search with frecency ranking. Query syntax: - Read mcx_grep SIMD-accelerated content search across files. Query examples: - Read mcx_list List all available MCX adapters and skills with their methods and descriptions. Read mcx_related Find files related to a given file by analyzing imports and exports. Returns: - Files that import the give... Read mcx_search Three search modes: ## Mode 1: Spec Exploration (code param) Query $spec with JS. All $refs pre-resolved. ... Read mcx_stats Session statistics: indexed content, searches, executions, variables. Read mcx_tasks List or check background tasks started with mcx_spawn. Examples: - mcx_tasks() → list all tasks - mcx_task... Read mcx_tree Navigate large JSON results without loading full content. Examples: - mcx_tree({ path: Read mcx_upgrade Get command to upgrade MCX to latest version.

WRITE 2 tools

Write mcx_edit Edit a file. Two modes: **Line mode** (PREFERRED - minimal context): mcx_edit({ file_path, start: 10, end:... Write mcx_write Create or overwrite a file. Bypasses native Write

EXECUTE 5 tools

Execute mcx_batch Run multiple executions and searches in one call. Bypasses throttling. Examples: - mcx_batch({ executions:... Execute mcx_doctor Run diagnostics to check MCX health: runtime, database, adapters, sandbox. Execute mcx_execute Execute JavaScript/TypeScript code in an isolated sandbox. NOT for file/content search - use mcx_find (fil... Execute mcx_run_skill Run a registered MCX skill by name. Available skills: [${skillNames}] ${skillList} Execute mcx_spawn Run code in background, returns immediately with task ID. Examples: - mcx_spawn({ code:

// FAQ

How many tools does the MCX (Modular Code Execution) MCP server have? +

The MCX (Modular Code Execution) MCP server exposes 18 tools across 3 categories: Read, Write, Execute.

How do I enforce policies on MCX (Modular Code Execution) tools? +

Route the MCX (Modular Code Execution) server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do MCX (Modular Code Execution) tools fall into? +

MCX (Modular Code Execution) tools are categorised as Read (11), Write (2), Execute (5). Each category has a recommended default policy.

Enforce policy on every MCX (Modular Code Execution) tool call.

Deterministic rules across all 18 MCX (Modular Code Execution) tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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