mcp-builder

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Check before installing.

By malob/nix-config (GitHub) · coding · 464 stars · scanned at commit 02235cf

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

Works with any agent that supports SKILL.md skills.

What this skill can do

Downloads and installs other software

The author does not mention this.

Found in 10 places.

configs/claude/skills/mcp-builder/SKILL.md, line 64- **v1** (`@modelcontextprotocol/sdk`): receives bug and security fixes only. Use it only when the project's `package.json` already depends on `@modelcontextpro
configs/claude/skills/mcp-builder/SKILL.md, line 66If the project already uses v1, tell the user once, in a sentence or two, that v2 (`@modelcontextprotocol/server`) is the current stable release, that v1 receiv
configs/claude/skills/mcp-builder/SKILL.md, line 152- Test with MCP Inspector: `npx @modelcontextprotocol/inspector`

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configs/claude/skills/mcp-builder/reference/evaluation.md, line 387pip install -r scripts/requirements.txt
configs/claude/skills/mcp-builder/reference/evaluation.md, line 392pip install anthropic mcp
configs/claude/skills/mcp-builder/reference/evaluation.md, line 556pip install -r scripts/requirements.txt
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 121- `bin` plus the `#!/usr/bin/env node` line at the top of `src/index.ts` let hosts launch the server with `npx -y {service}-mcp-server`
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 684- For manual exploration, `npx @modelcontextprotocol/inspector node dist/index.js` opens an interactive UI
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 712npx @modelcontextprotocol/codemod@latest v1-to-v2 .
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 714npx tsc --noEmit

Sends data to these websites: api.anthropic.com

The author does not mention this.

Found in 19 places.

configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 415import axios, { AxiosError } from "axios";
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 451const response = await axios({
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 476const response = await axios.get(`${API_URL}/resource/${resourceId}`);

Show 16 more

configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 482return axios.get(`${API_URL}/resource/${resourceId}`)
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 550"axios": "^1.7.9",
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 600import axios, { AxiosError } from "axios";
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 644const response = await axios({
configs/claude/skills/mcp-builder/reference/node_mcp_server.md, line 944- [ ] Error handling uses proper type guards (e.g., `axios.isAxiosError`, `z.ZodError`)
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 167const response = await fetch(url, {
configs/claude/skills/mcp-builder/reference/node_mcp_server_v2.md, line 315response = await fetch(url, {
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 214if isinstance(e, httpx.HTTPStatusError):
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 222elif isinstance(e, httpx.TimeoutException):
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 235async with httpx.AsyncClient() as client:
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 253async with httpx.AsyncClient() as client:
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 260response = requests.get(f"{API_URL}/resource/{resource_id}") # Blocks
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 384async with httpx.AsyncClient() as client:
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 396if isinstance(e, httpx.HTTPStatusError):
configs/claude/skills/mcp-builder/reference/python_mcp_server.md, line 404elif isinstance(e, httpx.TimeoutException):
configs/claude/skills/mcp-builder/scripts/evaluation.py, line 17from anthropic import Anthropic

Can call paid AI services billed to you

The author does not mention this.

Found in 1 place.

configs/claude/skills/mcp-builder/scripts/evaluation.py, line 17from anthropic import Anthropic

Safer alternatives

Low-risk skills in the same category (coding) that look related. Check that one does what you need.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'mcp-builder' ] || [ -L ~/.agents/skills/'mcp-builder' ]; then echo 'A skill folder named mcp-builder already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/malob/nix-config' "$d" && git -C "$d" checkout --quiet '02235cfdc2d6b8b57813bca95f653c35698bc270' -- 'configs/claude/skills/mcp-builder' && mkdir -p ~/.agents/skills && cp -R "$d"/'configs/claude/skills/mcp-builder' ~/.agents/skills/'mcp-builder' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'mcp-builder' ~/.claude/skills/'mcp-builder' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-09	`02235cf`	70
2026-11-07	`d8eef80`	70

Also found in

Identical copies of this skill exist at:

anthropics/skills/skills/mcp-builder
boisenoise/skills-collections/skills/anthropic-mcp-builder
stanfish06/skillquarium/skills/mcp-builder