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Api Fuzzing Bug Bounty

Listed
sickn33·vlatest·backend·MIT

Provides API guidance and assistance for agent workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add sickn33/agentic-awesome-skills --skill api-fuzzing-bug-bounty -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

sickn33

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill failed 1 of 6 checks. A failure is not proof of bad intent; it means something in the code needs a human to look at it before you run it.

  • No undeclared network calls: failed

    Contacts 1 host that is neither well-known infrastructure nor declared in the skill's frontmatter: target.com.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

    Hosts contacted

    127.0.0.1localtarget.comundeclared

    What it found

    • plugins/agentic-awesome-skills-claude/skills/api-fuzzing-bug-bounty/SKILL.md:267contacts target.com
      http://target.com/graphql?query={user(name:"<script>alert(1)</script>"){id}}
    • plugins/agentic-awesome-skills-claude/skills/api-fuzzing-bug-bounty/SKILL.md:270contacts target.com
      http://target.com/example?id=%C/script%E%Cscript%Ealert('XSS')%C/script%E
    • plugins/agentic-awesome-skills-claude/skills/api-fuzzing-bug-bounty/SKILL.md:435contacts target.com
      curl -X POST https://target.com/graphql \

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned sickn33/antigravity-awesome-skills at 5a4cdd9df8.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
5a4cdd9df8
Manifest
skills/api-fuzzing-bug-bounty/SKILL.md
Scanned
1 file, 410 lines
Copies in repo
3 — all of them scanned
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill provides guidance and techniques for testing APIs (REST, SOAP, and GraphQL) during bug bounty hunting and penetration testing engagements. It covers vulnerability discovery, authentication bypasses, insecure direct object reference (IDOR) exploitation, and other API-specific attack vectors. The skill assists in identifying vulnerabilities such as SQL injection points and unauthorized data access within these APIs.

When to use it

  • When conducting a bug bounty program or penetration test on an application with APIs.
  • To identify potential IDOR vulnerabilities by systematically testing user/resource identifiers.
  • For assessing the security of REST, SOAP, or GraphQL API endpoints.

Key capabilities

  • Provides techniques for identifying API types (REST, SOAP, GraphQL).
  • Offers guidance on API reconnaissance, including finding Swagger/OpenAPI documentation and using tools like Kiterunner.
  • Includes strategies for authentication testing, including checking rate limiting and differentiating between mobile and web APIs.
  • Details methods for IDOR exploitation.
  • Covers techniques to identify SQL injection points and unauthorized data access.

Example prompts

  • "How can I enumerate API endpoints?"
  • "What are common authentication bypass techniques for REST APIs?"
  • "Explain how to test for IDOR vulnerabilities."
  • “Describe the structure of a SOAP API.”

Tips & gotchas

  • Authorization Required: This skill is intended only for authorized security assessments, defensive validation, or controlled educational environments. Unauthorized use is prohibited.
  • Prerequisites: Familiarity with REST/GraphQL/SOAP protocols, Burp Suite (or similar proxy tool), API wordlists, and basic Python scripting are required to effectively utilize this skill.
  • Documentation Needed: Having target API endpoints and documentation significantly improves the effectiveness of the techniques described.