webmcp-kit

A plugin for adding WebMCP tools to a web application. WebMCP is a way for browser-based agents to use clearly defined actions provided by a website.

In plain words
What is it for?
Use it to inspect a web app, plan the tools it should expose, implement them with the @nekuda/webmcp-sdk package, and verify them in the browser.
Why use it?
It turns the work of exposing app actions to agents into a reviewable implementation process and checks that the resulting tools work in a browser.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add nekuda-ai/webmcp-kit
agentmods
npx agentmods add plugins/nekuda-ai/webmcp-kit/plugin
Clone the repo
git clone --depth 1 https://github.com/nekuda-ai/webmcp-kit

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

webmcp-kit 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 yesterday.

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.

plugin/.claude-plugin/plugin.json · 13 lines

What it actually says

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "webmcp-kit",
  "displayName": "WebMCP Kit",
  "version": "0.6.0",
  "description": "Add WebMCP tools to a web app: read the repo, propose a reviewable tool plan, implement against @nekuda/webmcp-sdk, and verify the tools in a browser.",
  "author": { "name": "nekuda", "url": "https://github.com/nekuda-ai" },
  "homepage": "https://github.com/nekuda-ai/webmcp-kit",
  "repository": "https://github.com/nekuda-ai/webmcp-kit",
  "license": "MIT",
  "keywords": ["webmcp", "model-context", "browser-agents", "nekuda", "agent-tools"]
}
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. yesterday First seen · 13 lines scan A c740f3fe6821

Subscribe to this mod's changes

webmcp-kit is a plugin published in the GitHub repository nekuda-ai/webmcp-kit (24 stars, last pushed 5d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.