# Api Security

> API security testing - GraphQL, REST API, WebSocket, and Web-LLM attack techniques.

- **Type:** Skill
- **Install:** `agentstack add skill-transilienceai-communitytools-api-security`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [transilienceai](https://agentstack.voostack.com/s/transilienceai)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [transilienceai](https://github.com/transilienceai)
- **Source:** https://github.com/transilienceai/communitytools/tree/main/skills/api-security
- **Website:** https://www.transilience.ai/

## Install

```sh
agentstack add skill-transilienceai-communitytools-api-security
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# API Security

Test API endpoints for security vulnerabilities across REST, GraphQL, WebSocket, and LLM-integrated APIs.

## Techniques

| Type | Key Vectors |
|------|-------------|
| **GraphQL** | Introspection, batching attacks, nested query DoS, field suggestion |
| **REST API** | BOLA/IDOR, mass assignment, rate limiting, auth bypass, versioning |
| **WebSocket** | Cross-site hijacking, message manipulation, auth flaws |
| **Web-LLM** | Prompt injection via API, excessive agency, data exfiltration |

## Workflow

1. Discover API endpoints and documentation (Swagger, GraphQL schema)
2. Map authentication and authorization mechanisms
3. Test per API type using appropriate techniques
4. Validate data exposure and access control flaws
5. Capture evidence with HTTP request/response logs

## Reference

- `reference/graphql*.md` - GraphQL attack techniques and labs
- `reference/scenarios/rest/*.md` - REST API security testing (BOLA/BOPLA, mass assignment, SSPP, content-type confusion)
- `reference/websockets*.md` - WebSocket vulnerability testing
- `reference/web-llm*.md` - Web-LLM attack techniques and labs

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [transilienceai](https://github.com/transilienceai)
- **Source:** [transilienceai/communitytools](https://github.com/transilienceai/communitytools)
- **License:** MIT
- **Homepage:** https://www.transilience.ai/

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** yes
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-transilienceai-communitytools-api-security
- Seller: https://agentstack.voostack.com/s/transilienceai
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.