arcjet-js

by arcjet · Developer Tools · ★ 693

arcjet-js is a project with MCP support by arcjet. Runtime security for AI apps and agents: prompt injection detection, tool-call authorization, sensitive-data redaction, bot protection, and rate limiting. Drop it into your JS/TS code. It has 693 GitHub stars and ranks #173 of 2217 in Developer Tools by stars.

Category: Developer Tools
Author: arcjet
GitHub stars: 693
This week: Tracking since 18 Oct 2026
Language: TypeScript
License: Apache-2.0 (open source)
Last update: 2026-10-23 (yesterday)
Links: Source Website

agent-security
ai-agents
ai-security
application-security
bot-detection
llm-security
mcp
pii-detection
prompt-injection-detection
rate-limiter
runtime-security
tool-authorization
+1 more

How to install arcjet-js

Install steps differ per project, so follow the README in the arcjet-js repository. Most MCP servers start with a single command (npx -y <package>, uvx <package> or a Docker image) that you add to your client's config. The install guide shows where that goes in Claude Code, Claude Desktop, Cursor and VS Code.

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Frequently asked questions

What is arcjet-js?

arcjet-js is a project with MCP support by arcjet in the Developer Tools category. Runtime security for AI apps and agents: prompt injection detection, tool-call authorization, sensitive-data redaction, bot protection, and rate limiting. Drop it into your JS/TS code. It has 693 GitHub stars and ranks #173 of 2217 in Developer Tools by stars.

Is arcjet-js free and open source?

Yes. arcjet-js is published under the Apache-2.0 license, so you can run, modify and self-host it at no cost. If it connects to a paid service, that service's own pricing and API terms still apply. Check the repository for the exact license text before using it commercially.

What are the alternatives to arcjet-js?

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Data last updated 25 October 2026. Stars and downloads are refreshed every day from GitHub and npm.