api-fuzzing-bug-bounty

api-fuzzing-bug-bounty is a skill for Claude Code, Codex from diegosouzapw/awesome-omni-skills. It costs 86 tokens per session (5,274 once invoked), scanned A, a copy of api-fuzzing-bug-bounty-v2, MIT.

An authorized security-testing guide for finding weaknesses in REST, SOAP, and GraphQL APIs. It covers techniques such as checking authentication, access controls, and IDOR, where one user may access another user's data.

In plain words
What is it for?
Use it for bug bounty work, penetration tests, and defensive checks of API endpoints, authentication, and access controls.
Why use it?
It helps security testers find API vulnerabilities before attackers do, within approved assessments or controlled labs.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex; mentions Gemini CLI; mentions OpenCode.

Good fit Use it for bug bounty work, penetration tests, and defensive checks of API endpoints, authentication, and access controls.

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Install with agentmods
npx agentmods add skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add diegosouzapw/awesome-omni-skills --skill api-fuzzing-bug-bounty
Clone the repo
git clone --depth 1 https://github.com/diegosouzapw/awesome-omni-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for api-fuzzing-bug-bounty

README.md
[![agentmods](https://agentmods.dev/badge/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty/github.svg)](https://agentmods.dev/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty)
Your own site
<a href="https://agentmods.dev/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty"><img src="https://agentmods.dev/badge/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for api-fuzzing-bug-bounty

Your own site · 80×15
<a href="https://agentmods.dev/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty"><img src="https://agentmods.dev/badge/skills/diegosouzapw/awesome-omni-skills/api-fuzzing-bug-bounty.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,274 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 98% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00086 $0.05274
Opus 5 $0.00043 $0.02637
Sonnet 5 $0.00017 $0.01055
Haiku 4.5 $0.00009 $0.00527

Measured 9d ago against content hash ce74880f42d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

api-fuzzing-bug-bounty scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST https://target.com/graphql \
Origin

This is a copy

98% identical to api-fuzzing-bug-bounty-v2 — 18 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/api-fuzzing-bug-bounty/SKILL.md · 579 lines

How it starts

The opening of the file, as written. The whole thing — 579 lines — stays where its author put it; the contents beside it link to each section on GitHub.

API Fuzzing for Bug Bounty

Overview

This public intake copy packages plugins/antigravity-awesome-skills-claude/skills/api-fuzzing-bug-bounty from https://github.com/sickn33/antigravity-awesome-skills into the native Omni Skills editorial shape without hiding its origin.

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses the external_source block in metadata.json plus ORIGIN.md as the provenance anchor for review.

AUTHORIZED USE ONLY: Use this skill only for authorized security assessments, defensive validation, or controlled educational environments. # API Fuzzing for Bug Bounty

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: Purpose, Inputs/Prerequisites, Outputs/Deliverables, API Types Overview, GraphQL-Specific Testing, Endpoint Bypass Techniques.

When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

  • This skill is applicable to execute the workflow or actions described in the overview.
  • Use when the request clearly matches the imported source intent: Provide comprehensive techniques for testing REST, SOAP, and GraphQL APIs during bug bounty hunting and penetration testing engagements. Covers vulnerability discovery, authentication bypass, IDOR exploitation, and....
  • Use when the operator should preserve upstream workflow detail instead of rewriting the process from scratch.
  • Use when provenance needs to stay visible in the answer, PR, or review packet.
  • Use when copied upstream references, examples, or scripts materially improve the answer.
  • Use when the workflow should remain reviewable in the public intake repo before the private enhancer takes over.

Read the full file on GitHub · 579 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 579 lines · 86 tokens per session scan A ce74880f42d2

Subscribe to this mod's changes

api-fuzzing-bug-bounty is a skill published in the GitHub repository diegosouzapw/awesome-omni-skills (140 stars, last pushed 2mo ago), licensed MIT. It adds 86 tokens to every session and 5,274 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 98% identical to api-fuzzing-bug-bounty-v2, differing in 18 lines, and is treated as a copy.