CEO of Arcjet (helping developers protect their apps). Co-Founder of Console (the best tools for developers). Researching sustainable computing at the University of Oxford.
What's new in Arcjet (2026-04-17). MCP server, a new AI coding agent plugin for Claude Code and Cursor, and new weekly security briefings via email.
The expertise required to apply security correctly can now live inside the agent, not inside the developer's head or a separate team's backlog.
Introducing Arcjet prompt injection detection. Catch hostile instructions before inference. Works with Next.js, Node.js, Flask, FastAPI, and any JavaScript / TypeScript or Python application.
We’ve just released v1.0 of the Arcjet JavaScript SDK. After more than two years of building, testing, and iterating in public, the
2025 was a defining year for Arcjet. We made deliberate progress across product, platform, and company, translating a clear focus into meaningful results. Over
The Arcjet Python SDK allows you to implement rate limiting, bot detection, email validation, and signup spam prevention in FastAPI and Flask style applications.
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