What is api-security-checker?

A checker for finding common security problems in API code or requests, such as SQL injection, cross-site scripting, and path traversal. It reports possible issues by severity and includes suggested fixes.

Reviewing API code or requests for injection flaws, unsafe deserialization, XML entity attacks, and other listed web security problems.

It helps spot attack paths during development before they reach a live API. It reduces the need to identify each common vulnerability by hand.

api-security-checker — Skill for Claude Code and Codex by fisker086

Install

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.

Any agent

npx skills add fisker086/AIOps --skill api_security_checker

Clone the repo

git clone --depth 1 https://github.com/fisker086/AIOps

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/fisker086/aiops/api_security_checker/github.svg)](https://agentmods.dev/skills/fisker086/aiops/api_security_checker)

Your own site

<a href="https://agentmods.dev/skills/fisker086/aiops/api_security_checker"><img src="https://agentmods.dev/badge/skills/fisker086/aiops/api_security_checker/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/fisker086/aiops/api_security_checker"><img src="https://agentmods.dev/badge/skills/fisker086/aiops/api_security_checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 11 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 164 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00011	$0.00164
Opus 5.5	$0.00004	$0.00066
Sonnet 5.5	$0.00002	$0.00033
Haiku 4.5	$0.00001	$0.00016

Measured 2mo ago against content hash fd3bcf3abfb7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-security-checker 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 2mo 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.

skills/api_security_checker/SKILL.md · 25 lines

What it actually says

API Security Checker

Checks for common web security vulnerabilities:

SQL Injection detection
XSS (Cross-Site Scripting) detection
Command Injection detection
Path Traversal detection
LDAP Injection detection
XXE detection
Unsafe deserialization

Use builtin_api_security_checker tool with fields:

code: the code or request to check (required)
language: (optional) programming language (default: auto-detect)
check_types: (optional) array of vulnerability types to check

Returns list of potential vulnerabilities with severity and recommendations.

Changes

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.

2mo ago First seen · 25 lines · 11 tokens per session scan A fd3bcf3abfb7

Subscribe to this mod's changes

api-security-checker is a skill published in the GitHub repository fisker086/AIOps (22 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 11 tokens to every session and 164 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Security

api-security-checker next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
api-security-checkerfisker086/AIOps	Skill	22	4mo ago	Apache-2.0	A	11	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	68k	2d ago	Apache-2.0	A	217	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code
fastapi-router-pymicrosoft/skills	Skill	3.2k	yesterday	MIT	A	46	Claude Code
dev-runtimelangwatch/langwatch	Skill	5.0k	yesterday	Apache-2.0	A	172	Claude Code
api-designericrisco/rsc-harness	Skill	503	2d ago	MIT	A	105	Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1	Skill	252	yesterday	MIT	A	106	Claude Code