# caido-mode

Wires your agent into Caido: search HTTP history with HTTPQL, probe with proxied curl, and hand requests off as named Replay sessions.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 2700 installs · ★ 285
- Author: caido
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/caido/skills/tree/HEAD/skills/caido-mode/SKILL.md
- Updated: 2026-08-13
- HTML: https://affpapa.org/en/nevibecode/skills/caido-mode

## What it does

The skill ships a CLI over Caido's API, built on the official `@caido/sdk-client`. It lives at `~/.claude/skills/caido-mode/caido-client.ts`, runs as `npx tsx caido-client.ts <command>`, and prints JSON unless told otherwise.

Two modes, and mixing them up wastes time. For testing, you pull a real authenticated request out of history, cache its headers and cookies into a curl config once with `export-curl --config`, then probe with `curl -K auth.cfg "$BASE/path"` so every request lands in Caido. For handoff, you materialize the request as a named Replay session inside a named collection — that is the only way the operator can see and re-run it.

The config is a static snapshot on purpose. It carries every auth header from the base request, including ones you would not guess like `X-Browser-Validation` and `Origin`, and inlines cookies without a cookie jar so rotated `Set-Cookie` values never overwrite good ones. `Content-Type` gets dropped, so pass it yourself on every POST and PUT. Bruteforce and fuzzing stay off the proxy — batches of 100+ requests bloat history, so run those direct and bring interesting hits back. PAT auth is recommended.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add caido/skills --skill caido-mode -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/caido-mode/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/caido-mode/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add caido/skills --skill caido-mode -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/caido-mode/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add caido/skills --skill caido-mode -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/caido-mode/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install caido/skills caido-mode
```

2. **Manually: put the files in place**
- File: `.github/skills/caido-mode/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add caido/skills --skill caido-mode -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/caido/skills --path skills/caido-mode
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/caido-mode/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add caido/skills --skill caido-mode -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/caido/skills/tree/HEAD/skills/caido-mode/SKILL.md

## When to use it
- find an authenticated request in history with HTTPQL
- cache target cookies and headers into a reusable config
- test for IDOR by swapping an id in the path
- hand a specific request to the operator as a named Replay session
- test path traversal without curl collapsing `../`

## Example prompts
- Search Caido history for requests to target.com/api/user and show them compactly
- Export the auth from request 8431 into a config and probe /api/user/999 with curl
- Create a Replay session named idor-user for this request in the target.com collection

## Source text · SKILL.md · MIT

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BEGIN THIRD-PARTY FILE add636f58875c631
```text
---
name: caido-mode
description: Full Caido SDK integration for Claude Code. Search HTTP history with HTTPQL, test with curl proxied through Caido (caching auth in reusable static curl config files), add match & replace rules, and organize handoffs into named replay sessions and collections - all via the official @caido/sdk-client. PAT auth recommended.
tags: [worker]
---

# Caido Mode Skill

A CLI over Caido's API (built on the official `@caido/sdk-client`) for HTTP-history-driven
testing. The tool lives at `~/.claude/skills/caido-mode/caido-client.ts`; every command is
`npx tsx caido-client.ts <command>` and outputs JSON unless noted.

## How to operate (read this first)

There are **two distinct modes**:

1. **Testing → use `curl`, always proxied through Caido.** Find a real authenticated request in
   history, cache its auth into a reusable curl config (a faithful static snapshot of its headers
   + cookies), then probe with `curl -K auth.cfg "$BASE/path"`. **All traffic must go through
   Caido** (the config carries the
   proxy), so every request lands in HTTP history.
2. **Handoff → use replay sessions + collections.** Only when handing a request (or a set) to the
   *user* do you materialize it as a named replay session inside a named collection.

Hard rules:

- **Everything goes through Caido — except high-volume bruteforce/fuzzing.** Never curl a single
  target request directly; always via the Caido proxy (the generated config does this; otherwise add
  `-x <proxy>`). **The one exception:** don't proxy bruteforce/fuzzing tools (`ffuf`, etc.) or any
  batch of **100+ requests at once** through Caido — it bloats HTTP history. Run those **direct** (no
  `-x`), then bring any interesting hit *back* into Caido (re-send it through the proxy / promote to
  Replay) to investigate and hand off.
- **Test with `curl`.** Don't spin up replay sessions for probing — that's handoff only.
- **To show the operator a request, send it to Replay.** Whenever you want the operator to *see* a
  specific request, create a **named replay session** for it (in a named collection if there's more
  than one) — that's how they inspect and re-run it in Caido. A request you tested via curl only
  becomes something the operator can work with once you promote it into Replay
  (`create-session <id> --name …`, or `send-raw … --name …` for a crafted one).
- **Cache auth in files, don't re-paste it.** Use `export-curl --config` once per target; then
  reference the config. Don't dump cookies/JWTs into every command (or repeatedly into context).
- **If you hand the operator a runnable command, make it a FULL self-contained curl** (all headers
```
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