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

8245entries
★ starsA–Z name

anthropic-mock

1
@davidreko

Drop-in mock for the Anthropic SDK. Test agent loops, tool use, and streaming without API calls.

updated May 2026

ClaudeMarketplace

1
@RealDougEubanks

A community-driven collection of custom skills for Claude Code, Anthropic's CLI tool for software engineering with Claude.

updated Jul 2026

shopflow-suite

1
@xiaojiou176-open

Chrome-first shopping extension product family with 8 storefront apps, 1 Suite shell, a reviewer-facing release shelf, and a read-only stdio MCP surface.

updated May 2026

hermes-loop

1
@akijain2000

Self-improving agent extension — creates skills from experience, compresses context iteratively, maintains persistent memory. Runs on Pi or Claude Code. Combines pi-mono + hermes-agent + Skill Factory.

updated May 2026

socials

1
@Brainrot-Creations

Claude Code plugin + MCP server: connect Claude to the Socials browser extension for X, LinkedIn & Reddit (Agent Mode, local WebSocket bridge).

updated Jun 2026

claude-code-extensions

1
@ariana126

My personal Claude Code extensions — skills, subagents, hooks, rules, and other customizations

updated Aug 2026

meridian

1
@amos-whitewolf

Use your Claude Max subscription with OpenCode, Pi, Droid, Aider, Crush, Cline. Proxy that bridges Anthropic's official SDK to enable Claude Max in third-party tools.

updated Apr 2026

claude-code-telegrammer

1
@scitex-ai

Custom Telegram MCP server + TUI auto-responder for Claude Code — 10 MCP tools, SQLite message store, access control, reaction support

updated Aug 2026

Tool-GTM-Analyzer

1
@stefanomartiradonna

GTM diagnostic tool, live at backend-friend.lovable.app. Scores 16 interconnected go-to-market elements from your own docs. Claude tool-use + Supabase, 64-file knowledge layer.

updated Aug 2026

lossless-claude

1
@offendingcommit

Cross-runtime memory bridge between Claude Code and OpenClaw via the lossless-claw LCM SQLite database. MCP recall tools, PreCompact capture hook, SessionStart bootstrap, lcm-recall skill.

updated Apr 2026

claude-quote-generator

1
@Pavan-G-K

A Python-based CLI tool that leverages the Anthropic Claude API to generate, display, and save themed motivational quotes in JSON format.

updated Jun 2026

api-to-tools

1
@SonAIengine

Universal library that converts any API (OpenAPI, WSDL/SOAP, GraphQL, gRPC) into LLM-callable tool definitions

updated Aug 2026

claude-cert-prep

1
@lucasxf

Practice exams and study tools for Anthropic's Claude certifications

updated Apr 2026

claude-advisor

1
@az9713

Anthropic advisor pattern: Claude Code /advisor skill + Advisor Tool API example

updated Aug 2026

rai-sdk

1
@rmagatti

Unified Rust SDK for OpenAI, Anthropic, and OpenRouter: typed models, typestate builders, structured output, tool calling, and streaming

updated Aug 2026

DetroitSportChatBot

1
@geoClink

Detroit Sports Chatbot — AI chatbot with live ESPN scores, Claude API tool use, and prompt engineering eval pipeline. Built with Python and Streamlit.

updated Aug 2026

claude-companion

1
@wjddusrb03

Real-time desktop widget that tracks your Claude Code usage — tokens, costs, tools, streaks, and more.

updated Jul 2026

engineering-os-extension

1
@Jerovino

Engineering Leader OS — Claude Code plugin with skills for daily routines, reviews, meeting prep, and decision logging

updated May 2026

ollama-router-claude-code

1
@kaunainkaisarwani

Use multiple Ollama API keys in a single Claude Code session — keys auto-rotate on rate limits so you never stop coding. Drop-in proxy for any Ollama model (Gemma, Qwen, LLaMA, Mistral). Full tool calling, streaming, smart cooldowns, and auto-failover.

updated Apr 2026

hivecode

1
@JasonDiazTTB

Real-time analytics dashboard for Claude Code — track sessions, tools, files, and costs via MCP

updated Apr 2026

claude-devtools-vscode-extension

1
@pavelpilyak

Cursor/VS Code extension that embeds the Claude DevTools UI (session viewer for Claude Code) as a native tab — macOS only.

updated Apr 2026

mnemoverse-vscode

1
@mnemoverse

Mnemoverse VS Code extension — persistent memory for AI coding assistants. OAuth-powered, syncs with Claude Code, ChatGPT, Cursor and other AI tools.

updated Jun 2026

dart-risk-mcp

1
@anboyu-alt

한국 상장사 금융감독원 DART 공시 분석 - 주가조작·불공정거래 위험 신호 탐지 도구 MCP

updated Aug 2026

AI-coding-agent-harness

1
@Mecha-Aima

Single-process Python harness for a Claude Code-style coding agent: streaming Anthropic Messages, parallel tools, YAML permissions, sessions, skills, MCP (stdio), teams, and optional background workers.

updated Apr 2026
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