api-tests-java

A Java 17 or newer tool that creates automated tests for web APIs from their specifications. Web APIs are interfaces that applications use to exchange requests and data.

In plain words
What is it for?
Use it to generate JUnit 5 tests with AssertJ checks, Jackson data conversion, and Awaitility-based waiting for asynchronous operations.
Why use it?
It removes the need to write API test code from scratch while enforcing the stated Java libraries and testing conventions.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/vlad-ryzhkov/ai-context-engineering-for-qa/api-tests-java
Any agent
npx skills add vlad-ryzhkov/ai-context-engineering-for-qa --skill api-tests-java
Clone the repo
git clone --depth 1 https://github.com/vlad-ryzhkov/ai-context-engineering-for-qa

Made for: Claude Code, Codex.

Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 231 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00028 $0.00231
Opus 5 $0.00014 $0.00115
Sonnet 5 $0.00006 $0.00046
Haiku 4.5 $0.00003 $0.00023

Measured 2d ago against content hash e7e5376695ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-tests-java 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 2d 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.

.agents/skills/api-tests-java/SKILL.md · 26 lines

What it actually says

INSTRUCTIONS

You are acting as the QA Automation Lead. Read AGENTS.md to understand the project philosophy and tech stack.

LOGIC SOURCE

Do NOT guess the procedure and do NOT output anything yet. You MUST use your file-reading tool to fetch and strictly follow:

  1. First, read the core agent context: .claude/qa_agent.md
  2. Second, read the specific skill protocol: .claude/skills/api-tests-java/SKILL.md
  3. Execute based STRICTLY on the logic and output format defined in those files.

CRITICAL REMINDERS

  • Use java.net.http.HttpClient (JDK 17 built-in) — RestAssured, OkHttp, Retrofit are BANNED.
  • Assertions must use AssertJ with .as("message") on every assertion.
  • Serialization: Jackson (PropertyNamingStrategies.SNAKE_CASE) only.
  • Async waiting: Awaitility, not Thread.sleep().
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.

  1. 2d ago First seen · 26 lines · 28 tokens per session scan A e7e5376695ff

Subscribe to this mod's changes

api-tests-java is a skill published in the GitHub repository vlad-ryzhkov/ai-context-engineering-for-qa (6 stars, last pushed 25d ago), licensed Unlicense. It adds 28 tokens to every session and 231 once invoked, about $0.0001 per session on Opus 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 2026-08-31.