Api Fuzzing Bug Bounty

Api Fuzzing Bug Bounty is a skill for Claude Code, Codex from mayurrathi/awesome-agent-skills. It costs 53 tokens per session (2,768 once invoked), scanned A, original, no licence file.

A skill for testing the security of APIs, which are interfaces that let software exchange data. It covers fuzzing, REST and GraphQL APIs, penetration testing, and finding possible IDOR vulnerabilities, where one user may access another user's data.

In plain words
What is it for?
Use it to test REST or GraphQL APIs, fuzz API inputs, check for IDOR issues, and perform API penetration testing in an authorized setting.
Why use it?
It helps look for security weaknesses that normal feature tests may miss, including incorrect access controls and unexpected input handling.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to test REST or GraphQL APIs, fuzz API inputs, check for IDOR issues, and perform API penetration testing in an authorized setting.

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Install with agentmods
npx agentmods add skills/mayurrathi/awesome-agent-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 mayurrathi/awesome-agent-skills --skill api-fuzzing-bug-bounty
Clone the repo
git clone --depth 1 https://github.com/mayurrathi/awesome-agent-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/mayurrathi/awesome-agent-skills/api-fuzzing-bug-bounty/github.svg)](https://agentmods.dev/skills/mayurrathi/awesome-agent-skills/api-fuzzing-bug-bounty)
Your own site
<a href="https://agentmods.dev/skills/mayurrathi/awesome-agent-skills/api-fuzzing-bug-bounty"><img src="https://agentmods.dev/badge/skills/mayurrathi/awesome-agent-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/mayurrathi/awesome-agent-skills/api-fuzzing-bug-bounty"><img src="https://agentmods.dev/badge/skills/mayurrathi/awesome-agent-skills/api-fuzzing-bug-bounty.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,768 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 unknown No closer match found 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 $0.00053 $0.02768
Opus 5 $0.00026 $0.01384
Sonnet 5 $0.00011 $0.00554
Haiku 4.5 $0.00005 $0.00277

Measured 11d ago against content hash 2ceca19a50c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, 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 11d 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 \
skills/api-fuzzing-bug-bounty/SKILL.md · 439 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 11d ago First seen · 439 lines · 53 tokens per session scan A 2ceca19a50c4

Subscribe to this mod's changes

Api Fuzzing Bug Bounty is a skill published in the GitHub repository mayurrathi/awesome-agent-skills (8 stars, last pushed 6mo ago), with no licence file. It adds 53 tokens to every session and 2,768 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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