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mcp-read-website-fast: Instructions file for Claude Code

CLAUDE.md

mcp-read-website-fast CLAUDE.md is an instructions file for Claude Code from just-every/mcp-read-website-fast. It costs 1,225 tokens per session, scanned A, original, MIT.

Repository instructions for working on a web content extractor that turns web pages into clean Markdown text. They describe the project structure and commands for its command-line and MCP interfaces, which let other tools use it.

In plain words
What is it for?
They help maintain URL fetching, robots.txt handling, crawling, page parsing, caching, Markdown conversion, command-line use, and the MCP server.
Why use it?
They give an unfamiliar developer the project context needed to find the right files and run development, build, fetch, cache, and server commands.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is just-every/mcp-read-website-fast's own configuration. It tells Claude Code how to work on mcp-read-website-fast itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-read-website-fast configures →

not rated 161repo 5d ago A scan 1,225 tokens original MIT
View source ↗ just-every/mcp-read-website-fast justevery.com
Reuse

Borrowing it

Nothing to install: this file belongs to just-every/mcp-read-website-fast. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/just-every/mcp-read-website-fast/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/just-every/mcp-read-website-fast

Made for: Claude Code.

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 mcp-read-website-fast CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/just-every/mcp-read-website-fast/claude-md/github.svg)](https://agentmods.dev/instructions/just-every/mcp-read-website-fast/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/just-every/mcp-read-website-fast/claude-md"><img src="https://agentmods.dev/badge/instructions/just-every/mcp-read-website-fast/claude-md/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.

agentmods 80×15 button for mcp-read-website-fast CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/just-every/mcp-read-website-fast/claude-md"><img src="https://agentmods.dev/badge/instructions/just-every/mcp-read-website-fast/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,225 This file is loaded in full into every session.
When invoked 1,225 The same file — it is already loaded in full.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01225 $0.01225
Opus 5 $0.00613 $0.00613
Sonnet 5 $0.00245 $0.00245
Haiku 4.5 $0.00122 $0.00122

Measured 9d ago against content hash cf8cb55ad0f7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mcp-read-website-fast 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 9d 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.

CLAUDE.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 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.

Project Overview

A fast, token-efficient web content extractor that converts web pages to clean Markdown. Designed for LLM/RAG pipelines, it provides both CLI and MCP server interfaces with smart caching, polite crawling, and minimal dependencies.

Core Modules & Files

  • src/crawler/: URL fetching, robots.txt respect, queue management
  • src/parser/: Readability extraction, HTML to Markdown conversion
  • src/cache/: SHA-256 based file caching system
  • src/internal/fetchMarkdown.ts: Core API shared by CLI and MCP
  • src/index.ts: CLI interface using Commander
  • src/serve.ts: MCP server using fastmcp
  • src/utils/: Logger and chunking utilities

Commands

Development

npm run dev fetch <URL>              # Fetch single page in dev mode
npm run dev fetch <URL> --pages 3    # Crawl up to 3 pages
npm run dev clear-cache              # Clear the cache
npm run serve:dev                    # Run MCP server in dev mode

Build & Production

npm run build                        # Compile TypeScript to JavaScript
npm run start                        # Run compiled CLI
npm run serve                        # Run compiled MCP server

Code Quality

npm run lint                         # Run ESLint
npm run typecheck                    # TypeScript type checking
npm test                             # Run tests with Vitest

Architecture

This is a TypeScript-based web content extractor that converts web pages to clean Markdown, designed for LLM/RAG pipelines. It provides both CLI and MCP server interfaces.

Core Components

  1. Fetching & Crawling (src/crawler/):

    • Uses undici for HTTP requests
    • Respects robots.txt via robots-parser
    • Manages crawl queue with configurable concurrency using p-limit

  2. Content Extraction (src/parser/):

    • @mozilla/readability for article extraction (Firefox Reader View engine)
    • jsdom for DOM parsing
    • turndown for HTML→Markdown conversion
    • Converts relative URLs to absolute in markdown output

Read the full file on GitHub · 174 lines

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. 9d ago First seen · 174 lines · 1,225 tokens per session scan A cf8cb55ad0f7

Subscribe to this mod's changes

mcp-read-website-fast CLAUDE.md is an instructions file published in the GitHub repository just-every/mcp-read-website-fast (161 stars, last pushed 5d ago), licensed MIT. It adds 1,225 tokens to every session, about $0.0061 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.

claudecodexcrawlerfastmarkdownmcp
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