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.
npx skills add tmolavi/mcp-agent-skills-hub --skill api-security-testinggit clone --depth 1 https://github.com/tmolavi/mcp-agent-skills-hubWrote 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.
[](https://agentmods.dev/skills/tmolavi/mcp-agent-skills-hub/api-security-testing)<a href="https://agentmods.dev/skills/tmolavi/mcp-agent-skills-hub/api-security-testing"><img src="https://agentmods.dev/badge/skills/tmolavi/mcp-agent-skills-hub/api-security-testing/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.
<a href="https://agentmods.dev/skills/tmolavi/mcp-agent-skills-hub/api-security-testing"><img src="https://agentmods.dev/badge/skills/tmolavi/mcp-agent-skills-hub/api-security-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00030 | $0.00957 |
| Opus 5.5 | $0.00012 | $0.00383 |
| Sonnet 5.5 | $0.00006 | $0.00191 |
| Haiku 4.5 | $0.00003 | $0.00096 |
Grade A, and why
api-security-testing scanned grade A with 0 findings 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to api-security-testing — 22 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.
How it starts
The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Security Testing Workflow
Overview
Specialized workflow for testing REST and GraphQL API security including authentication, authorization, rate limiting, input validation, and API-specific vulnerabilities.
When to Use This Workflow
Use this workflow when:
- Testing REST API security
- Assessing GraphQL endpoints
- Validating API authentication
- Testing API rate limiting
- Bug bounty API testing
Workflow Phases
Phase 1: API Discovery
Skills to Invoke
api-fuzzing-bug-bounty- API fuzzingscanning-tools- API scanning
Actions
- Enumerate endpoints
- Document API methods
- Identify parameters
- Map data flows
- Review documentation
Copy-Paste Prompts
Use @api-fuzzing-bug-bounty to discover API endpoints
Phase 2: Authentication Testing
Skills to Invoke
broken-authentication- Auth testingapi-security-best-practices- API auth
Actions
- Test API key validation
- Test JWT tokens
- Test OAuth2 flows
- Test token expiration
- Test refresh tokens
Copy-Paste Prompts
Use @broken-authentication to test API authentication
Phase 3: Authorization Testing
Skills to Invoke
idor-testing- IDOR testing
Actions
- Test object-level authorization
- Test function-level authorization
- Test role-based access
- Test privilege escalation
- Test multi-tenant isolation
Copy-Paste Prompts
Use @idor-testing to test API authorization
Phase 4: Input Validation
Skills to Invoke
api-fuzzing-bug-bounty- API fuzzingsql-injection-testing- Injection testing
Actions
- Test parameter validation
- Test SQL injection
- Test NoSQL injection
- Test command injection
- Test XXE injection
Copy-Paste Prompts
Use @api-fuzzing-bug-bounty to fuzz API parameters
Phase 5: Rate Limiting
Skills to Invoke
api-security-best-practices- Rate limiting
Actions
- Test rate limit headers
- Test brute force protection
- Test resource exhaustion
- Test bypass techniques
- Document limitations
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.
- 1mo ago First seen · 177 lines · 30 tokens per session scan A 5eb0a027aa11
api-security-testing is a skill published in the GitHub repository tmolavi/mcp-agent-skills-hub (8 stars, last pushed 1mo ago), licensed MIT. It adds 30 tokens to every session and 957 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to api-security-testing, differing in 22 lines, and is treated as a copy.
Other skills, from other repositories
documentation-and-adrs
Records decisions and documentation. Use when you need to document an architecture decision (ADR) or the reasoning behind a design choice, when changing public APIs, shipping features, or when you need to record context that future engineers and agents will need to understand the codebase.
ai-output-validation
Validates, parses, and sanitizes AI-generated outputs before they reach end users or downstream systems. Structured output enforcement, schema validation, and fallback handling.
integration-testing
Test real system boundaries, not mocks of mocks. Integration tests verify that components work together, not that they work in isolation.
code-simplification
A code-review and refactoring guide for making existing code easier to read while keeping its behavior unchanged. Refactoring means changing how code is organized without changing what it does.
shipping-and-launch
A production-release checklist and planning guide for putting software in front of real users. It covers testing, security, monitoring, staged rollout, and rollback, which means returning to the previous working version.
taming-copilot
Your mission is to be a precise, surgical assistant that respects existing code, follows user commands absolutely, and avoids any unsolicited changes.