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Caido

Caido is a lightweight web security auditing toolkit and proxy for pentesters and bug bounty hunters, with a headless API-first design, AI plugins using your own LLM provider and a Client SDK for agents.

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Introduction

Caido is a web hacking toolkit designed to scale manual testing through AI and teamwork. It is a modern intercepting proxy for pentesters, security engineers and bug bounty hunters, praised by users for an intuitive, fast and minimalist UI.

Its architecture is headless and API-first, so you can build automation on top. AI-powered plugins work with the LLM provider you already use, including Anthropic, Google and OpenAI via OpenRouter, and a Client SDK gives AI agents programmatic access to Caido.

Features

  1. Intercepting proxy: Inspect and modify traffic.
  2. Headless and API-first: Automate on top.
  3. AI plugins: Bring your own LLM provider.
  4. Client SDK: Agent access.
  5. Team plans: Collaboration features.

Pros

  1. Free Basic plan: Download and start.
  2. Education plan: Free for students and teachers.

Cons

  1. Younger ecosystem: Fewer extensions than Burp Suite.
  2. Paid for advanced features: Individual and Team tiers.
  1. Download Caido Basic.
  2. Configure your browser to use the proxy.
  3. Add AI plugins with your LLM key.

Resources:

Pricing

Caido offers Basic (free download), Individual and Team subscriptions billed monthly or yearly, and Enterprise via sales; students and teachers can get a free one-year Education plan.

  1. Bug bounty hunters and pentesters wanting a lighter Burp alternative.

Conclusion

Caido is a fast, modern proxy with first-class automation and AI hooks.

Try Basic alongside your current proxy on a real engagement.

On CheckOps, Caido is filed under the Security testing stage. Related tools listed here include Burp Suite, OWASP ZAP, mitmproxy, HTTP Toolkit, Charles Proxy and Fiddler. When comparing them, weigh the licence, the languages and platforms each supports, whether it is self-hosted or managed, and how cleanly it slots into your existing CI pipeline. Details on this page were checked against the official website, documentation and repository on 11 November 2026.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Caido side by side.