hunt-spa-api

92 / 100 · Low risk

Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By elementalsouls/Claude-BugHunter (GitHub) · security · 5,515 stars · scanned at commit d5dcc53

Discover a single-page-app's hidden backend API from its public JS bundle, then test that API for broken access control / missing authentication. One of the highest-yield web plays in modern recon — SPAs ship their entire backend route map to the browser, and the API behind them is frequently missing the auth middleware the login page implies. Built from an authorized engagement where this play found an unauthenticated financial API that an ASM scan reporting hundreds of "Criticals" completely …

Works with any agent that supports SKILL.md skills.

What this skill can do

Sends data to these websites: console.target.com, console.target.com$j, api.target.com

The author does not mention this. Expected for a security skill.

Found in 4 places.

skills/hunt-spa-api/SKILL.md, line 26curl -s https://console.target.com/ -o index.html
skills/hunt-spa-api/SKILL.md, line 38curl -s "https://console.target.com$j" -o "bundles/$(echo "$j"|tr '/' '_')"
skills/hunt-spa-api/SKILL.md, line 68curl -s -X POST https://api.target.com/api/users -H 'Content-Type: application/json' -d '{}'

Show 1 more

skills/hunt-spa-api/SKILL.md, line 77curl -s -o /tmp/r -w "[%{http_code}] $r\n" -X POST -H 'Content-Type: application/json' -d '{}' "https://api.target.com/api/v2/$r"

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.

Found in 6 places.

skills/hunt-spa-api/SKILL.md, line 26curl -s https://console.target.com/ -o index.html
skills/hunt-spa-api/SKILL.md, line 36mkdir bundles
skills/hunt-spa-api/SKILL.md, line 44B=bundles/*.js

Show 3 more

skills/hunt-spa-api/SKILL.md, line 60grep -oE '[0-9]+:"[a-f0-9]+"' bundles/*main*.js # {chunkId:"hash"} pairs
skills/hunt-spa-api/SKILL.md, line 68curl -s -X POST https://api.target.com/api/users -H 'Content-Type: application/json' -d '{}'
skills/hunt-spa-api/SKILL.md, line 76for r in <routes>; do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'hunt-spa-api' ] || [ -L ~/.agents/skills/'hunt-spa-api' ]; then echo 'A skill folder named hunt-spa-api already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/elementalsouls/Claude-BugHunter' "$d" && git -C "$d" checkout --quiet 'd5dcc5347675ed431488e0a0e46749e4918aa194' -- 'skills/hunt-spa-api' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/hunt-spa-api' ~/.agents/skills/'hunt-spa-api' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'hunt-spa-api' ~/.claude/skills/'hunt-spa-api' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-10	`d5dcc53`	92
2026-11-08	`42a3ab1`	92
2026-11-06	`3e71af0`	92