api-validation

api-validation is a skill for Claude Code, Codex from brennhill/Kaboom-Browser-AI-Devtools-MCP. It costs 30 tokens per session (235 once invoked), scanned A, original, AGPL-3.0.

An API-checking skill for examining how software sends requests and returns responses. An API is a way for programs to exchange data, while a contract or schema describes the expected request and response shape.

In plain words
What is it for?
Use it to validate API contracts, compare behavior with a specification, and check request or response data.
Why use it?
It helps find incorrect responses, mismatches with the documented specification, and schema drift—when the real API changes away from what clients expect.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

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/brennhill/kaboom-browser-ai-devtools-mcp/api-validation
Any agent
npx skills add brennhill/Kaboom-Browser-AI-Devtools-MCP --skill api-validation
Clone the repo
git clone --depth 1 https://github.com/brennhill/Kaboom-Browser-AI-Devtools-MCP

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.

agentmods badge for api-validation

README.md
[![agentmods](https://agentmods.dev/badge/skills/brennhill/kaboom-browser-ai-devtools-mcp/api-validation.svg)](https://agentmods.dev/skills/brennhill/kaboom-browser-ai-devtools-mcp/api-validation)
Your own site
<a href="https://agentmods.dev/skills/brennhill/kaboom-browser-ai-devtools-mcp/api-validation"><img src="https://agentmods.dev/badge/skills/brennhill/kaboom-browser-ai-devtools-mcp/api-validation.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 235 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 5.1 $0.00030 $0.00235
Opus 5 $0.00015 $0.00118
Sonnet 5 $0.00006 $0.00047
Haiku 4.5 $0.00003 $0.00023

Measured 6d ago against content hash 94f22da36bb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

api-validation 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 6d 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.

npm/kaboom-agentic-browser/skills/api-validation/SKILL.md · 43 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 6d ago First seen · 43 lines · 30 tokens per session scan A 94f22da36bb0

Subscribe to this mod's changes

api-validation is a skill published in the GitHub repository brennhill/Kaboom-Browser-AI-Devtools-MCP (65 stars, last pushed yesterday), licensed AGPL-3.0. It adds 30 tokens to every session and 235 once invoked, about $0.0002 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 2026-08-30.