Arcjet Plugin — Security skill for Claude Code

Arcjet Plugin for AI Coding Agents

[Arcjet](https://arcjet.com) is the runtime security platform that ships in your AI code. Detect prompt injection, authorize agent tool calls, redact sensitive data, and block bots and abuse. Real-time security building blocks you call inside your app, before an action happens.

The [Arcjet plugin](https://github.com/arcjet/arcjet-plugin) turns any supported AI coding agent into a security expert. It pre-loads agents with knowledge of the Arcjet security platform and automatically injects the right guidance based on what you're working on — framework-specific SDK patterns, protection rules, and best practices.

• MCP integration — connects to the Arcjet MCP Server for traffic analysis, request inspection, IP investigation, and remote rule management
• CLI integration — invokes the Arcjet CLI for authentication, site/key setup, live request streaming, and remote rule management
• Security-aware coding rules — framework-specific guidance activates automatically when you work in route handlers, API endpoints, and AI/LLM code
• Skills — task-oriented workflow sourced from arcjet/skills for adding protection to any code path (HTTP routes and non-HTTP code)
• Security analyst agent — investigates threats, analyzes traffic, and manages rules via MCP

Installation

Cursor and ChatGPT/Codex add **marketplaces** (a git repo that catalogs plugins), not a lone plugin URL. Use the marketplace commands below for those hosts. Other agents can still install the plugin from the repo root.

Cursor

Add this GitHub repository as a marketplace, then install the `arcjet` plugin:

• In Customize, paste https://github.com/arcjet/arcjet-plugin
• Or run:

agent plugin marketplace add https://github.com/arcjet/arcjet-plugin

ChatGPT / Codex

codex plugin marketplace add arcjet/arcjet-plugin