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.
npx agentmods add instructions/misterboe/webtools-mcp-server/claude-mdgit clone --depth 1 https://github.com/misterboe/webtools-mcp-serverWrote 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.
[](https://agentmods.dev/instructions/misterboe/webtools-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/misterboe/webtools-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/misterboe/webtools-mcp-server/claude-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.02102 | $0.02102 |
| Opus 5 | $0.01051 | $0.01051 |
| Sonnet 5 | $0.00420 | $0.00420 |
| Haiku 4.5 | $0.00210 | $0.00210 |
Grade A, and why
webtools-mcp-server CLAUDE.md 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Overview
This is a Model Context Protocol (MCP) server that provides comprehensive web analysis tools including HTML extraction, screenshot capture, debugging, performance analysis, and Lighthouse audits. The server is built with Node.js, uses Puppeteer for browser automation, and is designed to be used with Claude Desktop.
Commands
Development Commands
npm start- Start the MCP servernpm test- Run testsnpm run inspect- Start MCP Inspector for debugging and testing toolsnpm install- Install dependenciesnode src/index.js- Direct server execution
Installation & Usage
npm install -g @bschauer/webtools-mcp-server- Global installationnpx @bschauer/webtools-mcp-server- Direct execution via npxnode src/index.js --help- Show configuration help and token optimization options
Token Usage Optimization
- Default: All tools loaded (~10.3k tokens)
- ENABLED_TOOLS environment variable: Control which tools are loaded
- --tools CLI argument: Override tool selection
- Available presets: ALL, BASIC (~1k tokens), WEB, DEBUG, PERFORMANCE, FULL_ANALYSIS
- Individual tools: Comma-separated list of specific tools
Architecture
Core Components
Entry Points:
src/index.js- Main entry point that starts the serversrc/server.js- Server configuration and request handling
Tool System:
src/tools/- Individual tool implementationshtml.js- HTML extraction and markdown conversionscreenshot.js- Screenshot capture with device emulationdebug.js- Debug console with layout thrashing detectionlighthouse.js- Lighthouse audit integrationperformance/- Performance analysis tools (trace, coverage, web vitals, network)
Configuration:
src/config/- Configuration filestool-definitions.js- Tool schemas and parameter definitionscapabilities.js- Server capabilities declarationdevices.js- Device emulation profilesnetwork_conditions.js- Network condition profiles
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.
- 4d ago First seen · 200 lines · 2,102 tokens per session scan A f44c1590b2db
webtools-mcp-server CLAUDE.md is an instructions file published in the GitHub repository misterboe/webtools-mcp-server (0 stars, last pushed 1y ago), licensed MIT. It adds 2,102 tokens to every session, about $0.0105 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.
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cc-websearch CLAUDE.md
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sniff AGENTS.md
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fast-browser CLAUDE.md
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sendblue-browser-use AGENTS.md
Instructions for sendblue-api/sendblue-browser-use, covering agents.md — sendblue-browser-use, what this repo is, setup, common commands and health (no auth).