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

8240entries
★ starsA–Z name

saas-research-tool

1
@yuvraj-xyz

Give it a SaaS URL, get a full AI-generated sales research report

updated Jun 2026

command-palette-extension-claude

1
@brunolm

PowerToys Command Palette extension that runs `claude -p` and renders the response inline

updated Jun 2026

slack-mcp

1
@adelaidasofia

Multi-workspace Slack MCP server for Claude Code. xoxc/xoxp/xoxb auth, draft+confirm on writes, vault auto-export, prompt-injection scrubber, audit log. 18 tools.

updated Jun 2026

moy-sport-bot

1
@IvanAnis777

Multi-agent AI coaching system · Telegram bot · Anthropic Claude · RAG · Garmin integration · SQLite time-series · tool-calling

updated May 2026

pi-anthropic-bash

1
@code-yeongyu

Anthropic native bash policy extension for the pi coding agent. Ensures native bash tools are present on anthropic-messages payloads when opt-in is enabled and appends bash guidance to the system prompt.

updated Jun 2026

pi-anthropic-tool-search

1
@code-yeongyu

Anthropic native tool-search policy extension for the pi coding agent. Conditionally injects Anthropic tool-search tools based on PI_ANTHROPIC_TOOL_SEARCH and appends tool-search guidance to the system prompt.

updated May 2026

tokenvision

1
@Zarenk

Per-project token usage tracker for Claude Code — live monitor, weekly budget, context-drain diagnostics. Desktop (Electron) + CLI + Chrome extension.

updated May 2026

claude-goal

1
@nuko-nova-dynamics

Goal-bounded autonomous turns for Claude Code — set an objective, set a budget, walk away. Stop-hook continuation engine + tool-equipped completion evaluator.

updated Jul 2026

terraform-provider-anthropic-claude-managed-agents

1
@modus-agendi

Community Terraform / OpenTofu provider for Anthropic Claude Managed Agents. Declaratively manage agents (with tools, MCP servers, skills, multiagent), environments, vaults, custom skill uploads, and memory stores. Secrets via Terraform 1.11 write-only attributes.

updated Jul 2026

Obsidian-mcp

1
@bdwalter

Obsidian community plugin: exposes the vault to Claude (and any MCP client) as a local Streamable HTTP MCP server. Tools, resources, prompts.

updated Jun 2026

ag-ui-claude-agents

1
@mbrian23

Pluggable AG-UI + Claude Agent SDK libraries (server / react / pdf / core) plus a DevOps demo. PDF parity enforced at compile time; skills bundle MCP tools + prompt fragments + bash whitelist.

updated Jul 2026

prompt-cache-optimizer

1
@leonhail-nell

Drop-in wrappers for the Anthropic, OpenAI, and Gemini SDKs that make prompt caching effortless. Measure real cache hit rate from the response usage object, attach dollar savings to every call, canonicalize shuffled tools and RAG document order so a "slightly different" payload still hits the cache.

updated Jun 2026

claude-code-hooks

1
@gerard-labs

Type-safe Claude Code hooks for PHP. Every event, every tool input, every response — fully typed, mutation-tested, and kept in sync with the Anthropic spec by a daily drift job.

updated May 2026

worktrace

1
@BODMAT

Browser extension + web dashboard for AI-assisted dev session tracking

updated Jun 2026

writing-context-rtfm

1
@joaocarlos

A MCP extension built on top of rtfm-ai that it acts as a gatekeeper by taking the agent's task, queries the underlying RTFM index, filters out background noise, and packs only the essential and supporting source chunks into a tight contextualized prompt.

updated Jun 2026

claude-auto-plan-mode-ui

1
@PettHa

Companion VSCode extension that patches Claude Code's webview to add an Auto plan mode entry to the mode picker

updated May 2026

excel-live-mcp

1
@arttiongson

Excel Claude Code Token Optimized MCP Server. Read-only live Excel access via peek tools and server-side aggregation, designed to minimize LLM token usage.

updated Jun 2026

code-reviewer

1
@ajmc90

Claude Code Reviewer plugin for Visual Studio Code — An extension that integrates Claude-powered code review directly into VS Code, helping developers analyze code, detect issues, suggest improvements, and streamline the development workflow without leaving the editor.

updated May 2026

docuagent

1
@Harsha77064

Production-grade AI agent for technical documentation Q&A — FastAPI + Claude Sonnet + LangChain + FAISS + SSE streaming + MCP-style tool calling + response evaluation

updated May 2026

research-agent

1
@Arun4535

AI research agent powered by Anthropic Claude tool use

updated Jun 2026

cctx

1
@anil7948

Reduce Claude Code token usage by 70-90% using a free local LLM (Ollama). MCP server + Stop hook with codebase indexing, tool output compression, and turn summarization.

updated Jun 2026

thesis-app

1
@Superman752

AI-powered deal flow tool for venture capital analysts. Upload any pitch deck PDF and get a structured deal analysis, thesis fit score, red flag detection, AI content detection, and investment memo in under 30 seconds. Built with Next.js, TypeScript, Anthropic Claude API, Supabase, and Vercel.

updated Jul 2026

hafla-intelligence-gateway

1
@evinops-hafla

Public client packages for the Hafla Intelligence MCP gateway. Ships @hafla/intelligence-mcp-bridge (stdio↔HTTPS shim with Google-OIDC auth via gcloud) and a Claude Code plugin / Gemini CLI extension.

updated May 2026

claude-deck

1
@moonexpr

A web-based dashboard for visually managing and configuring Claude Code projects and extensions.

updated Jun 2026
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