api-fuzzing-bug-bounty SKILL.md skillC
api-fuzzing-bug-bounty from zebbern/claude-code-guide is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add zebbern/claude-code-guide/api-fuzzing-bug-bounty@v1.1Pins v1.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- C, 15 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- zebbern/claude-code-guide
- Path
skills/api-fuzzing-bug-bounty/SKILL.md- Versions recorded
- 3
- Latest version
- v1.1, committed May 31, 2026
- First version recorded
- Jan 4, 2026
- Size
- 10,286 bytes
- Repository stars
- 4,666
- License
- MIT
This skill should be used when the user asks to "test API security", "fuzz APIs", "find IDOR vulnerabilities", "test REST API", "test GraphQL", "API penetration testing", "bug bounty API testing", or needs guidance on API security assessment techniques.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# API Fuzzing for Bug Bounty ## Purpose 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 API-specific attack vectors. ## Inputs/Prerequisites - Burp Suite or similar proxy tool - API wordlists (SecLists, api_wordlist) - Understanding of REST/GraphQL/SOAP protocols - Python for scripting - Target API endpoints and documentation (if available) ## Outputs/Deliverables - Identified API vulnerabilities - IDOR exploitation proofs - Authentication bypass techniques - SQL injection points - Unauthorized data access documentation --- ## API Types Overview | Type | Protocol | Data Format | Structure | |------|----------|-------------|-----------| | SOAP | HTTP | XML | Header + Body | | REST | HTTP | JSON/XML/URL | Defined endpoints | | GraphQL | HTTP | Custom Query | Single endpoint | --- ## Core Workflow ### Step 1: API Reconnaissance Identify API type and enumerate endpoints: ```bash # Check for Swagger/OpenAPI documentation /swagger.json /openapi.json /api-docs /v1/api-docs /swagger-ui.html …
Read the whole file at its exact version.
How to install
mdr add zebbern/claude-code-guide/api-fuzzing-bug-bounty@sha256:b09dbcb762f0c1a2The line at the top of this page pins the label v1.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wlpnnhws5zay73h5)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 4, 2026 and May 31, 2026, about one every 74 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1 latest | 2026-05-31 | 164971d | 10,286 B | C | view · diff |
| v1.1 | 2026-01-20 | 27bf883 | 10,290 B | C | view · diff |
| git:20260104.9174e17 | 2026-01-04 | 9174e17 | 10,245 B | C | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://127.0.0.1:8443)
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10286 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
zebbern/claude-code-guide · 4,666 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wlpnnhws5zay73h5 GET https://markdownregistry.com/api/v1/resolve?ref=zebbern/claude-code-guide/api-fuzzing-bug-bounty GET https://markdownregistry.com/api/v1/blob/b09dbcb762f0c1a2315761b9d07b47a6fdc31a68a0cb888e40cb12b54c3ede68
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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