cloudflare-mcp-server

cloudflare-mcp-server is a skill for Claude Code from secondsky/claude-skills. It costs 26 tokens per session (488 once invoked), scanned A, original, MIT.

A guide and toolkit for building MCP servers on Cloudflare Workers. MCP, or Model Context Protocol, is a standard that lets AI tools call functions and access data provided by a server.

In plain words
What is it for?
It is for creating MCP tools, data resources, reusable prompts, and server connections using Cloudflare Workers.
Why use it?
It explains the parts of an MCP server and how to run them on Cloudflare, reducing the work needed to connect AI tools to your services.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the cloudflare-mcp-server plugin — 1 skill, 3 MCP servers shipped together

Good fit It is for creating MCP tools, data resources, reusable prompts, and server connections using Cloudflare Workers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/secondsky/claude-skills/cloudflare-mcp-server
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.

Any agent
npx skills add secondsky/claude-skills --skill cloudflare-mcp-server
Clone the repo
git clone --depth 1 https://github.com/secondsky/claude-skills

Made for: Claude Code.

Or install cloudflare-mcp-server, the plugin that ships this one along with the rest of its 1 skill, 3 MCP servers.

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 cloudflare-mcp-server

README.md
[![agentmods](https://agentmods.dev/badge/skills/secondsky/claude-skills/cloudflare-mcp-server.svg)](https://agentmods.dev/skills/secondsky/claude-skills/cloudflare-mcp-server)
Your own site
<a href="https://agentmods.dev/skills/secondsky/claude-skills/cloudflare-mcp-server"><img src="https://agentmods.dev/badge/skills/secondsky/claude-skills/cloudflare-mcp-server.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 488 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00026 $0.00488
Opus 5 $0.00013 $0.00244
Sonnet 5 $0.00005 $0.00098
Haiku 4.5 $0.00003 $0.00049

Measured 4d ago against content hash 2a1c59bb9f5c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

cloudflare-mcp-server 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.

The scan reads SKILL.md. This mod also ships 8 executable files (templates/basic-mcp-server.ts, templates/basic-mcp.ts, templates/mcp-bearer-auth.ts, …), 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.

plugins/cloudflare-mcp-server/skills/cloudflare-mcp-server/SKILL.md · 70 lines

What it actually says

Cloudflare MCP Server

Last Updated: 2025-11-21

Quick Start

import { McpServer } from '@modelcontextprotocol/sdk';

const server = new McpServer({
  name: 'my-server',
  version: '1.0.0'
});

server.tool('getTodo', async ({ id }) => ({
  id,
  title: 'Task',
  completed: false
}));

export default server;

Core Concepts

  • Tools: Functions AI can call
  • Resources: Data AI can access
  • Prompts: Reusable templates
  • Transports: SSE, HTTP, WebSocket

Example Tool

server.tool('searchDocs', {
  description: 'Search documentation',
  parameters: {
    type: 'object',
    properties: {
      query: { type: 'string' }
    }
  },
  handler: async ({ query }) => {
    return { results: [...] };
  }
});

Resources

Core Documentation

  • references/quick-start-guide.md (704 lines) - Official Cloudflare templates, complete step-by-step workflow, 5-minute setup
  • references/core-concepts.md (66 lines) - MCP fundamentals: tools, resources, prompts, transports
  • references/worker-basics.md (326 lines) - Worker & Durable Objects basics, transport selection, HTTP fundamentals
  • references/stateful-servers.md (246 lines) - Durable Objects integration, WebSocket hibernation, cost optimization, common patterns
  • references/production-deployment.md (814 lines) - Deployment & testing, configuration reference, authentication patterns, 22 known errors with solutions

Templates

  • templates/basic-mcp.ts - Minimal MCP server
  • templates/tools-example.ts - Tool definitions
  • templates/durable-object-mcp.ts - Stateful MCP with DO
  • templates/websocket-mcp.ts - WebSocket transport

Official Docs: https://modelcontextprotocol.io | Cloudflare: https://developers.cloudflare.com/workers/runtime-apis/durable-objects/

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. 4d ago First seen · 70 lines · 26 tokens per session scan A 2a1c59bb9f5c

Subscribe to this mod's changes

cloudflare-mcp-server is a skill published in the GitHub repository secondsky/claude-skills (215 stars, last pushed today), licensed MIT. It adds 26 tokens to every session and 488 once invoked, about $0.0001 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 2026-09-03.