offensive-api-abuse

SnailSploit/Claude-Red Security Coding & code review

offensive-api-abuse is a skill in SnailSploit/Claude-Red, last changed 25 Aug 2026. It can touch credentials, run shell commands, reach the network and name web addresses — read the findings before installing.

From the author

Advanced API exploitation methodology focused on business logic abuse and sophisticated attack patterns that bypass traditional security controls. Covers business logic bypass through API call chaining and workflow manipulation. Addresses GraphQL-specific attacks including batching for credential brute-force, query depth exploitation, and introspection abuse. Includes pagination exploitation for data exfiltration, webhook hijacking for SSRF and data interception, and resource exhaustion through algorithmic complexity attacks. Covers race conditions in API transactions using parallel request techniques. Provides comprehensive JWT manipulation including algorithm confusion, kid injection, jku/x5u abuse, and claim tampering. Details API key leakage detection across source repositories, client-side code, and error messages. Covers undocumented endpoint discovery through predictable naming, debug routes, and source map analysis. Tooling includes Arjun, ParamSpider, jwt_tool, and GraphQL Voyager. Designed for authorized penetration testers targeting business logic layers that automated scanners miss.

How much a skill can do, not whether it is risky.

Pattern check

Nothing flagged

That isn't proof the skill is harmless.

Commit a8de813 · 3 Nov 2026

How the check works

Pattern check: nothing flagged

That isn't proof the skill is harmless.

Install

Each tab says whether it installs commit a8de813, the one we checked, or the latest version.

OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. SnailSploit/Claude-Red/Skills/api/offensive-api-abuse (opens in a new tab)

Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.

Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie and Amp. With This project, Any agent also reaches Antigravity and Claude Code reaches Cline. Kiro needs the folder copied by hand.

Pinned to commit a8de813, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .claude/skills &&mkdir .claude/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .claude/skills/offensive-api-abuse/ &&rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Claude Code docs

Pinned to commit a8de813, the one we checked.

Skills in the Claude apps belong to your account rather than to a project.

Make offensive-api-abuse.zip, with the skill folder at the top level:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&out="$(mktemp -d)" &&cp -R "$tmp"/Skills/api/offensive-api-abuse "$out"/offensive-api-abuse &&(cd "$out" && zip -qr - offensive-api-abuse) > offensive-api-abuse.zip &&rm -rf "$tmp" "$out"

In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose offensive-api-abuse.zip.

On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.

Claude apps docs

Pinned to commit a8de813, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .agents/skills &&mkdir .agents/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .agents/skills/offensive-api-abuse/ &&rm -rf "$tmp"

Codex picks up new skills on its own; restart it if this one does not appear.

Codex docs

Pinned to commit a8de813, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .cursor/skills &&mkdir .cursor/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .cursor/skills/offensive-api-abuse/ &&rm -rf "$tmp"

Cursor docs

Pinned to commit a8de813, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .github/skills &&mkdir .github/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .github/skills/offensive-api-abuse/ &&rm -rf "$tmp"

In a running Copilot CLI session, run /skills reload.

Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.

gh skill install SnailSploit/Claude-Red Skills/api/offensive-api-abuse/SKILL.md@a8de813edc9f66f60d44cfe42d47750e89d9930b --agent github-copilot --scope project

Copilot & VS Code docs

Pinned to commit a8de813, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .gemini/skills &&mkdir .gemini/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .gemini/skills/offensive-api-abuse/ &&rm -rf "$tmp"

In a running session, run /skills reload.

Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.

gemini skills install https://github.com/SnailSploit/Claude-Red.git --path Skills/api/offensive-api-abuse --scope workspace

Gemini CLI docs

Pinned to commit a8de813, the one we checked.

OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/SnailSploit/Claude-Red.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin a8de813edc9f66f60d44cfe42d47750e89d9930b &&git -C "$tmp" sparse-checkout set -- Skills/api/offensive-api-abuse &&git -C "$tmp" checkout -q a8de813edc9f66f60d44cfe42d47750e89d9930b &&mkdir -p .agents/skills &&mkdir .agents/skills/offensive-api-abuse &&cp -R "$tmp"/Skills/api/offensive-api-abuse/. .agents/skills/offensive-api-abuse/ &&rm -rf "$tmp"

Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.

npx skills@1.7.4 add SnailSploit/Claude-Red --skill offensive-api-abuse

Agent Skills docs

Read SKILL.md first

MIT

Licence

10.3k

Repo stars

Folder last changed

Publisher

Files

Checked

3 Nov 2026

What it can touch

From the files and frontmatter at commit a8de813. This is how much a skill can do, not whether it is risky.

Touches credentials
It reads, asks for or contains keys, tokens, passwords or similar secrets.
SKILL.md:215 (opens in a new tab) · SKILL.md:298 (opens in a new tab)
Runs shell commands
Its instructions or files give the agent commands to run on your computer.
Reaches the network
It sends or fetches data over the internet, for example with curl, an HTTP library or a package install.
Names web addresses
It mentions outside web addresses the agent may visit. We list them but don't follow them.
Outside links we did not follow

Pattern check

Pattern check: nothing flagged · commit a8de813 · 3 Nov 2026

We checked every text file in this skill, at commit a8de813 on 3 Nov 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check works Report an incorrect finding

Outside links we did not follow

http://internal-api.local:3000/health
http://elasticsearch.internal:9200/_cat/indices
https://target.example.com$
https://owasp.org/API-Security/editions/2023/en/0x11-t10/
https://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/10-Business_Logic_Testing/
https://graphql.org/learn/security/
https://portswigger.net/web-security/race-conditions
https://github.com/ticarpi/jwt_tool
https://github.com/s0md3v/Arjun
https://github.com/devanshbatham/ParamSpider

Show 2 more

https://github.com/graphql-kit/graphql-voyager
https://datatracker.ietf.org/doc/html/rfc7519

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

Agent Skills specFails
The open format from agentskills.io, held to the strictest version of each rule among the agents we check.
- Error
  The description is 1,111 characters; the limit is 1,024. D2
  Fix: Shorten it to 1,024 characters or fewer, and move detail into the body.
- Warning
  The body is about 5,306 tokens (approx.); the spec suggests under 5,000. B2
  Fix: Move detail into reference files that the agent reads only when needed.
- Note
  There is no license field, so readers can't tell whether they may reuse the skill. O2
  Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.
Claude CodePasses
Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.
- Note
  The body is about 5,306 tokens (approx.); the spec suggests under 5,000. After compaction Claude Code keeps only the first 5,000 tokens of a skill. B2
  Fix: Move detail into reference files that the agent reads only when needed.
Claude apps & API uploadFails
Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.
- Error
  The description is 1,111 characters; the limit is 1,024. Anthropic's validator rejects it. D2
  Fix: Shorten it to 1,024 characters or fewer, and move detail into the body.
- Note
  The body is about 5,306 tokens (approx.); the spec suggests under 5,000. Anthropic's guidance says the same. B2
  Fix: Move detail into reference files that the agent reads only when needed.
OpenAI (Codex & API)Fails
Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.
- Error
  The description is 1,111 characters; the limit is 1,024. Codex has no limit, but OpenAI's upload follows the spec. D2
  Fix: Shorten it to 1,024 characters or fewer, and move detail into the body.
VS Code & CopilotPasses with warnings
VS Code reads skills one folder below .github/skills, .claude/skills or .agents/skills and falls back to the folder name when the name is missing or differs; GitHub's Copilot docs require the exact name SKILL.md.
- Warning
  The description is 1,111 characters; the limit is 1,024. VS Code cuts it at 1,024 characters. D2
  Fix: Shorten it to 1,024 characters or fewer, and move detail into the body.

SKILL.md

Read SKILL.md on GitHub

Files

1 file

Path	Size
SKILL.md (opens in a new tab)	21.9 KB

More from SnailSploit/Claude-Red

Skill	What it can touch	Pattern check	Licence	Updated
offensive-active-directoryActive Directory attack methodology for internal network red team engagements. Covers reconnaissance (BloodHound, PowerView, ADExplorer), credential abuse (Kerberoasting, ASREProasting, NTLM relay, LLMNR/NBT-NS poisoning), privilege escalation (ACL abuse, GPO abuse, unconstrained/constrained delegation), lateral movement (Pass-the-Hash, Pass-the-Ticket, Overpass-the-Hash, WMI/WinRM/PsExec), persistence (Golden/Silver/Diamond Tickets, DCSync, DCShadow, AdminSDHolder, Skeleton Key), forest trust attacks, ADCS abuse (ESC1-ESC15), and modern MDI/Defender for Identity evasion. Use when assessing on-prem AD, hybrid AD/Entra ID environments, or ADCS deployments. Touches credentials +2 more Pattern check: Nothing flaggedMITUpdated 6 May 2026	Touches credentials Runs shell commands +1 more	Pattern check: Nothing flagged	MIT	6 May 2026
offensive-advanced-redteamComprehensive red team operations methodology covering full engagement lifecycle from planning through reporting. Addresses engagement scoping and rules of engagement negotiation, multi-tier C2 infrastructure design with redirectors and domain fronting, malleable traffic profiles and beacon tradecraft, OPSEC discipline including attribution avoidance and indicator management, EDR and AMSI evasion techniques using direct syscalls and unhooking, data collection with chain-of-custody controls, and structured reporting with purple team debrief workflows. Covers assumed-breach, external-to-internal, insider threat, and hybrid physical-cyber engagement scenarios with MITRE ATT&CK mapping throughout. Targets operators planning or executing adversary simulation engagements against mature defenders. Touches credentials +4 more Pattern check: 1 item to reviewMITUpdated 25 Aug 2026	Touches credentials Downloads software +3 more	Pattern check: 1 item to review	MIT	25 Aug 2026
offensive-ai-security Names web addresses Pattern check: 2 items to reviewMITUpdated 6 May 2026	Names web addresses	Pattern check: 2 items to review	MIT	6 May 2026
offensive-anti-forensicsAnti-forensics and evidence destruction techniques for red team operators conducting authorized engagements. Covers log clearing on Windows (wevtutil, Clear-EventLog, ETW provider patching) and Linux (journal truncation, utmp/wtmp binary editing, syslog manipulation), timestamp manipulation via Timestomp and SetMACE to defeat timeline analysis, filesystem-level anti-forensics including NTFS Alternate Data Streams for payload hiding and secure deletion with sdelete/shred, memory artifact removal to counter live forensics, disk artifact manipulation targeting MFT entries and USN journal records, network forensics evasion through encrypted C2 channels and DNS-over-HTTPS tunneling, and anti-VM/sandbox detection to avoid dynamic analysis environments. Tools: Timestomp, wevtutil, sdelete, shred, MimiPenguin, Invoke-Phant0m. Aligns to MITRE ATT&CK T1070 (Indicator Removal), T1027 (Obfuscated Files or Information), T1497 (Virtualization/Sandbox Evasion). Each technique includes the forensic artifact it targets, the destruction or manipulation method, and the defender perspective so operators understand detection gaps they must account for. Touches credentials +3 more Pattern check: Nothing flaggedMITUpdated 25 Aug 2026	Touches credentials Runs shell commands +2 more	Pattern check: Nothing flagged	MIT	25 Aug 2026
offensive-api-securityComprehensive API security testing methodology covering REST, gRPC, and WebSocket attack surfaces. Addresses the full OWASP API Security Top 10 2023 including BOLA/IDOR, broken authentication, excessive data exposure, rate limiting bypass, BFLA, mass assignment, SSRF, and security misconfiguration. Includes REST-specific attacks such as HTTP verb tampering, content-type switching, and parameter pollution. Covers gRPC exploitation through protobuf interception, reflection API enumeration, and metadata injection. Addresses WebSocket vulnerabilities including origin bypass, message injection, and cross-site WebSocket hijacking. Provides tooling guidance for Burp Suite, Postman, grpcurl, websocat, and mitmproxy. Each technique includes detection signatures and defensive indicators so you understand what artifacts your testing leaves behind. Designed for authorized penetration testing engagements against API-driven architectures. Touches credentials +3 more Pattern check: Nothing flaggedMITUpdated 25 Aug 2026	Touches credentials Runs shell commands +2 more	Pattern check: Nothing flagged	MIT	25 Aug 2026
offensive-basic-exploitation Touches credentials +4 more Pattern check: Nothing flaggedMITUpdated 6 May 2026	Touches credentials Turns off system protections +3 more	Pattern check: Nothing flagged	MIT	6 May 2026

All skills in SnailSploit/Claude-Red

Other Security skills

Same category, most repo stars first.

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agent-architecture-auditFull-stack diagnostic for agent and LLM applications. Audits the 12-layer agent stack for wrapper regression, memory pollution, tool discipline failures, hidden repair loops, and rendering corruption. Produces severity-ranked findings with code-first fixes. Essential for developers building agent applications, autonomous loops, or any LLM-powered feature. Use when an agent or LLM feature misbehaves and the failing layer is unknown, or before shipping an agent stack. affaan-m/ECC Runs shell commands Pattern check: Nothing flaggedMITUpdated 11 Aug 2026	Runs shell commands	Pattern check: Nothing flagged	MIT	11 Aug 2026
agent-security-hardeningSecurity hardening guidance for AI agent frameworks that process untrusted content, invoke tools, write workspace files, manage runtime identifiers, or handle credentials. Use when building or reviewing an agent runtime, autonomous worker, tool gateway, memory service, or multi-tenant agent deployment. Do not use for general web application security or offensive testing. affaan-m/ECC Instructions only Pattern check: Nothing flaggedMITUpdated 9 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	9 Oct 2026
ponytail-auditQuality audit of a whole repo: bugs, security holes, what breaks under real load, risky code without tests, slow paths, and what to delete, merge or split. Ranked, each finding explained in plain English. One-shot report, changes nothing. Use for "audit this codebase", "review the whole repo", "find bloat", "what can I delete", /ponytail-audit. DietrichGebert/ponytail Instructions only Pattern check: Nothing flaggedMITUpdated 8 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	8 Oct 2026
csoSecurity audit: supported static findings; qualified profiles add reproduction and repair candidates. (gstack) garrytan/gstack Touches credentials +4 more Pattern check: Nothing flaggedMITUpdated 26 Oct 2026	Touches credentials Runs shell commands +3 more	Pattern check: Nothing flagged	MIT	26 Oct 2026
doubt-driven-developmentSubjects every non-trivial decision to a fresh-context adversarial review before it stands. Use when you want every assumption cross-examined before proceeding, when stress-testing a plan for hidden failure modes, when correctness matters more than speed, when working in unfamiliar code, when stakes are high (production auth, security-sensitive logic, a high-stakes migration, irreversible operations), or any time a confident output would be cheaper to verify now than to debug later. addyosmani/agent-skills Runs shell commands Pattern check: Nothing flaggedMITUpdated 28 Oct 2026	Runs shell commands	Pattern check: Nothing flagged	MIT	28 Oct 2026
security-and-hardeningHardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or external integrations, or when checking a login flow is safe against the OWASP Top Ten. Use when building any feature that accepts untrusted data, manages user sessions or session cookies, or interacts with third-party services. Use when auditing dependencies for known vulnerabilities, triaging package-manager audit findings, or assessing supply-chain risk in a new package. Use when personal data or privacy compliance (GDPR, CCPA) is involved. addyosmani/agent-skills Touches credentials +3 more Pattern check: Nothing flaggedMITUpdated 30 Oct 2026	Touches credentials Runs shell commands +2 more	Pattern check: Nothing flagged	MIT	30 Oct 2026

At a glance

What it can touch

Pattern check

Install

Claude Code

Claude apps

Codex

Cursor

Copilot & VS Code

Gemini CLI

Any agent

What it can touch

Pattern check

Outside links we did not follow

Format check

SKILL.md

Files

More from SnailSploit/Claude-Red

Other Security skills