crawlforge-mcp: Skill for Claude Code

.claude/skills/mcp-implementation/SKILL.md

mcp-implementation is a skill for Claude Code from mysleekdesigns/crawlforge-mcp. It costs 44 tokens per session (496 once invoked), scanned A, original, MIT.

A coding guide for building CrawlForge MCP servers, which let AI applications call tools through a shared protocol. It covers tool registration, input checking, web scraping, and server structure.

In plain words
What is it for?
Use it when adding server tools, defining input schemas with Zod, handling URLs and extraction errors, and organizing MCP server code.
Why use it?
It provides established implementation patterns for connecting scraping logic to AI-callable tools and validating incoming data.

Skill for Claude Code

Written for Claude Code: context: fork in frontmatter. Also seen: agent in frontmatter.

This is mysleekdesigns/crawlforge-mcp's own configuration. It tells Claude Code how to work on crawlforge-mcp 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 crawlforge-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mysleekdesigns/crawlforge-mcp. 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/mysleekdesigns/crawlforge-mcp/main/.claude/skills/mcp-implementation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mysleekdesigns/crawlforge-mcp

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-implementation

README.md
[![agentmods](https://agentmods.dev/badge/skills/mysleekdesigns/crawlforge-mcp/mcp-implementation.svg)](https://agentmods.dev/skills/mysleekdesigns/crawlforge-mcp/mcp-implementation)
Your own site
<a href="https://agentmods.dev/skills/mysleekdesigns/crawlforge-mcp/mcp-implementation"><img src="https://agentmods.dev/badge/skills/mysleekdesigns/crawlforge-mcp/mcp-implementation.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 496 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00044 $0.00496
Opus 5 $0.00022 $0.00248
Sonnet 5 $0.00009 $0.00099
Haiku 4.5 $0.00004 $0.00050

Measured 7d ago against content hash fdfb6ae7f5f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

mcp-implementation 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 7d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/test-tool.sh, scripts/validate-schema.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/skills/mcp-implementation/SKILL.md · 69 lines

What it actually says

MCP Implementation Skill

You are an MCP server implementation specialist with deep expertise in the Model Context Protocol SDK and web scraping technologies.

Core Competencies

  1. MCP SDK Implementation - Tool registration, schema validation, transport
  2. Web Scraping Integration - URL handling, content extraction, error handling
  3. Code Quality - ES modules, Zod validation, clean patterns

Server Structure

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { z } from "zod";

Tool Implementation Pattern

For detailed patterns, see: implementation-patterns.md

server.registerTool(
  'tool_name',
  {
    description: 'Clear description of tool purpose',
    inputSchema: zodSchema
  },
  withAuth('tool_name', async (params) => {
    // Validate, execute, return
    return { content: [{ type: "text", text: JSON.stringify(result) }] };
  })
);

CrawlForge Tool Categories

For credit-efficient usage, see: credit-optimization.md

Category Tools Credits
Basic fetch_url, extract_text, extract_links, extract_metadata 1
Advanced scrape_structured, search_web, extract_content, summarize_content 2-3
Premium crawl_deep, map_site, batch_scrape, deep_research, stealth_mode 5-10

Quality Checklist

  • Proper Zod schemas
  • Error handling for all edge cases
  • No duplicate code
  • Follows MCP SDK patterns
  • Works with stdio transport
  • Executable via npx

Key Libraries

  • @modelcontextprotocol/sdk - Core MCP functionality
  • zod - Schema validation
  • cheerio or jsdom - HTML parsing
  • sanitize-html - Content sanitization
Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 7d ago First seen · 69 lines · 44 tokens per session scan A fdfb6ae7f5f9

Subscribe to this mod's changes

mcp-implementation is a skill published in the GitHub repository mysleekdesigns/crawlforge-mcp (2 stars, last pushed today), licensed MIT. It adds 44 tokens to every session and 496 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 2026-08-31.

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