Developer Tools & Repos MCP Servers for HTTP / API

GitHub MCP — wraps the GitHub public REST API (no auth required for public endpoints)

GitLab MCP — wraps the GitLab REST API v4 (BYO API key)

Barcode / GTIN validation MCP (EAN-13, UPC-A, EAN-8, GTIN-14).

Hex.pm MCP — package registry for the Elixir & Erlang ecosystems.

Homebrew formulae.brew.sh MCP.

HTML entities MCP.

ISBN validation & conversion MCP.

LaunchDarkly MCP Pack — wraps the LaunchDarkly REST API v2

pub.dev MCP — package registry for Dart & Flutter.

QR Code MCP — wraps api.qrserver.com (free, no auth)

Search the Plainsight playbook and review code against proven best practices.

PowerShell backtick-escape count, input discarded

programming identifier charset, value discarded

Lean 4 MCP server: compile, prove theorems, and formalize math with Mathlib.

Detect npm download-pumping before adding a dependency: real usage vs inflated counter.

Generate QR codes from text or URLs. Returns base64 PNG. x402 micropayment.

Generate QR codes for URLs, PIX, Wi-Fi, vCards, WhatsApp and more. For AI agents.

Quoted-printable length, text discarded

Generates cryptographically random integers in a given range, using crypto/rand.

Valida regex, cron y SQL contra ejecucion real. Pago por llamada via x402/USDC.

Summarize repository changes for a release.