api-security-testing skillA
api-security-testing is agent-read markdown (skill) from usestrix/strix: Security-test a REST, GraphQL, or gRPC API with Strix — autonomous agents that enumerate endpoints from an OpenAPI/GraphQL schema (or by crawling), then actually exploit the API-specific vulnerability classes in the OWASP API Security Top 10 (2023) — broken object-level authorization (BOLA/IDOR), broken object property level authorization (excessive data exposure and mass assignment), broken function-level authorization, unrestricted resource consumption, SSRF, injection, and auth/token flaws. E.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Security-test an API APIs fail differently from web UIs: there is no rendered surface to crawl, the interesting bugs are authorization-shaped rather than injection-shaped, and the same endpoint behaves differently per token. This workflow targets those specifics with Strix's autonomous agents, using the current [OWASP API Security Top 10 (2023)](https://owasp.org/API-Security/editions/2023/en/0x11-t10/) as the coverage checklist. For the web-app equivalent, the current edition is the OWASP Top 10:2025 — see **owasp-top-10-testing**. Install, LLM setup, full CLI flags, and the managed-cloud path are in the **penetration-testing-with-strix** skill. Read it if `strix --version` fails or the target is not an API. For a run with no Docker and no LLM key, the same binary drives the managed platform: `strix cloud login`, then `strix cloud scans start ...` (details in **managed-pentesting-with-strix**). ## 1. Gather what the agents need APIs are near-impossible to test blind, so collect first: | Input | Why it matters | |---|---| …
Read the whole file at its exact version.
How to install
mdr add usestrix/strix/api-security-testing@git:20260917.46d7bdbmdr add usestrix/strix/api-security-testing@sha256:bd04c90d87be2353Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_xdg3lsegnlpyw2gm)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260917.46d7bdb latest | 2026-09-17 | 46d7bdb | 6,331 B | A | view · diff |
| git:20260901.42baa7c | 2026-09-01 | 42baa7c | 6,290 B | A | view · diff |
| git:20260820.d6a3ca7 | 2026-08-20 | d6a3ca7 | 5,700 B | A | view · diff |
| git:20260820.9099710 | 2026-08-20 | 9099710 | 5,389 B | A | view · diff |
| git:20260820.2cc8167 | 2026-08-20 | 2cc8167 | 6,100 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6331 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
- pass: No link to a raw IP address
- pass: No script tag
Source
usestrix/strix · 64,366 stars · license Apache-2.0 · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xdg3lsegnlpyw2gm GET https://markdownregistry.com/api/v1/resolve?ref=usestrix/strix/api-security-testing GET https://markdownregistry.com/api/v1/blob/bd04c90d87be2353ebefee33363af0818746345e25c80ed36f63fcdd2b25509c
Your agent 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.