Open-Source Directory — Claude / Anthropic

Claude
Tools

A curated index of extensions, plugins, MCP servers, hooks, and integrations for Claude — discovered from GitHub and refreshed daily.

Repository Growth — Last 30 Days

8261entries
★ starsA–Z name

PSYCHO-Py800MCP

★ 1
@saitoomituru

MCP bridge for oscilloscope, logic analyzer, and microscope automation. AI-driven waveform analysis and schematic-aware measurement with Claude.

updated Jul 2026

thespin-extensions

★ 1
@shaferllc

Official thespin.ad agent extensions — sponsored line for Claude Code, VS Code/Cursor, Codex CLI, Gemini CLI

updated Aug 2026

claude-engineering-coach

★ 1
@nnhhoang

A native Claude Code plugin that coaches you on your AI coding — analyze local Claude Code (and Codex/OpenCode) sessions via MCP tools and /coach commands. Local-only, read-only. Not a VS Code/Copilot extension. Reuses microsoft/ai-engineering-coach (MIT).

updated Aug 2026

claude-p-gateway

★ 1
@preston176

Self-hosted Anthropic-compatible HTTP gateway that proxies /v1/messages to a locally-authenticated `claude -p`, so a Claude.ai subscription powers your tooling instead of metered API credits.

updated Jul 2026

skillselion-mcp

★ 1
@skillselion

MCP server to search Skillselion's curated directory of Claude Code skills, MCP servers & plugin marketplaces, ranked by installs and GitHub stars.

updated Sep 2026

jeffrey-censor-extension

★ 1
@sayhi7562

A project that wants to test Claude code by writing code to follow the prompt

updated Jun 2026

ClaudeForge

★ 1
@cziraattila123-cell

A professional CLI tool for developers to interact with the Anthropic Claude API

updated Jun 2026

claude-toolbox

★ 1
@JayOfemi

Open library of small, install-and-own Claude Code skills and commands, including a wording linter and a pre-public secret scanner.

updated Jul 2026

hpsilab-quant-finance-mcp

★ 1
@haiyunsky

Quant finance MCP server for stock analysis, options analytics, implied volatility, Monte Carlo simulation, AI prediction, and backtesting.

updated Oct 2026

spinix-vscode

★ 1
@pranavred

Open client source of the Spinix VS Code / Claude Code extension — pings you when your AI agent finishes and shows perks/offers on the spinner. Backend is separate.

updated Jul 2026

claude_for_phcode

★ 1
@ryuuiro

extensión claude code para phoenix code

updated Jul 2026

pi-cc-vscode-ext

★ 1
@JoeHelbing

Pi extension exposing VS Code context through Claude Code's local IDE bridge

updated Sep 2026

free-to-use-claude-code

★ 1
@Rajeshwar-dev

About Use claude code and codex for free in the terminal, VSCode extension, and discord like OpenClaw (voice supported)

updated Oct 2026

resend-mcp-server

★ 1
@blw10210

Claude generated Resend MCP Server for Claude Cowork

updated Jun 2026

claude-code-toolcall-recovery

★ 1
@MufanQiu

Claude Code Stop hook that auto-recovers from malformed tool calls (model emits a tool call as text, e.g. dropping the antml: prefix) instead of stalling the session.

updated Jul 2026

kie

★ 1
@aryangv

Trending dev-tool radar + Claude Code extension recommender, as a keyless MCP server for Claude Code and Cursor

updated Jul 2026

pi-permission-modes

★ 1
@aprimediet

Claude Code style permission modes extension for pi coding agent

updated Jul 2026

anthropic-news-bot

★ 1
@devbret

AI-powered news discovery tool which explores topics via APIs by using Anthropic’s Claude model and surfaces the most significant stories in a dashboard.

updated Oct 2026

extensions

★ 1
@yarrasys

Open-source agent skills for Claude Code & the AI-agent ecosystem. Install: npx skills add yarrasys/skills@<name>. First skill: kdbx (per-project/per-env KeePassXC credentials).

updated Jul 2026

claude-roslyn-lsp

★ 1
@erinloy

Roslyn C#/VB language server for Claude Code: one shared per-workspace server, analyzer shadow-copying so builds never lock, native .slnx and .NET 10, with a refactoring MCP and an extension API for live systems.

updated Sep 2026

repolith

★ 1
@ethanrickyjrjr-wq

The coordination layer for parallel AI coding agents — plan-time conflict catch, edit gate, auto-resume — plus monorepo ergonomics for multi-repo workspaces. CLI + MCP server + VS Code extension.

updated Aug 2026

stars-cash-flow-mcp

★ 1
@govRosMedia

MCP server, AI skill & Hermes tool for the Stars Cash Flow reseller API — buy & manage real Telegram Stars CPA / SMM orders (subscribers, boosts, bot starts) from Claude, ChatGPT or any AI agent. JustAnotherPanel-compatible.

updated Jun 2026

claude-api-starter

★ 1
@Lazaro549

Clean Python starter kit for the Anthropic Claude API — basic chat, streaming, tool use and ReAct agents.

updated Sep 2026

opencode-compaction-guard

★ 1
@viiqswim

OpenCode plugin: prevent & auto-recover from the 'tool_use without tool_result' error after compaction or interrupted tool calls

updated Aug 2026
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