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

mcpfactory

1
@mariojgt

Pick the tools you want, click build, download a ready-to-run MCP server. 32 integrations, browser-built, zero infra.

updated May 2026

claudegrain

1
@FlyTOmeLight

Granular Claude Code usage in your menu bar — per-repo / per-tool / per-MCP / cache-hit attribution

updated May 2026

awesome-bot-paste

1
@edequalsawesome

Raycast extension that cleans up Claude Code terminal output on the clipboard. Port of simonw/tools cleanup-claude-code-paste.html.

updated May 2026

AhuehueteKokoro

1
@lunitomx

Kokoro — extension de Claude Code para estrategia de marketing desde la raiz

updated Aug 2026

agent-halter

1
@fgrehm

A conversation-budget extension for AI coding agents (pi only for now, claude code planned)

updated Jul 2026

claude-trading-signals

1
@daperk

Generate structured trading signals from market data using Claude (Anthropic SDK). Tool use for type-safe outputs, prompt caching, and a validation layer.

updated May 2026

glyph-grid-studio

1
@Joona-t

Real-time character-grid image renderer for macOS — GUI + CLI + MCP server. p5.js + Tauri 2 + Rust.

updated Aug 2026

Claude_API_Integration_In_Applications

1
@abdulsammad2004

Hands-on implementations from Anthropic's official "Building with the Claude API" course. Covers tool use, RAG pipelines, MCP servers, agentic workflows, prompt engineering, and streaming —

updated Jul 2026

out-of-band-diffs-vscode-extension

1
@SeekoeiD

Claude Code inline diff review for VS Code with editorInsets-based phantom red rows and per-hunk Accept/Revert controls

updated Jun 2026

clauge

1
@clauding-lab

Token analytics and subscription value dashboard for Claude Code + claude.ai. Native menu-bar app for macOS and Windows desktop app (.exe). Browser extension auto-syncs claude.ai plan usage.

updated Aug 2026

AUDITLY-AI-Spend-Audit

1
@IshaMahadev

A brutalist, mathematically-defensible web tool that instantly audits AI infrastructure spend (Cursor, Claude, Copilot) to identify wasted capital and oversized subscriptions. Built with Next.js, Prisma, and Anthropic.

updated Jul 2026

simulacrum-tools

1
@jmcentire

A cognitive simulacrum of Jeremy McEntire — an AI agent that thinks like Jeremy on novel situations. Two-phase classifier dispatch over Anthropic + (optional) OpenAI fine-tune. Includes a deployable Fly.io service, a CLI / Claude Code skill, and a primer for building one for a different subject.

updated Aug 2026

wealthsimple-mcp

1
@tatianathevisionary

Unofficial MCP server exposing the Wealthsimple Help Center to AI agents — 7 typed tools, public Zendesk JSON API only. No scraping, no auth, no account data. TypeScript + Zod-validated. Opt-in Datadog LLM Observability with privacy redaction.

updated Jun 2026

Anthropic-Skills-for-enterprise-marketing-os

1
@afelipeg

30 connected Claude Skills for enterprise marketing ops. Install in-house to replace fragmented tools or reclaim outsourced operations. Marketing & Comms [working & non-working media]· CRM & Growth · Shopper & Trade · RGM · Finance.

updated May 2026

tokenometer

1
@faraa2m

LLM cost calculator, token counter, latency benchmark, CI guardrail, MCP server, and VS Code/Cursor extension.

updated Jul 2026

nocode-evolve

1
@3dot141

Harrison's personal Claude Code plugin: SessionStart hook injects global rules + skills/agents/MCP extension slots

updated Aug 2026

Claude-Skill-Creator

1
@valorisa

A meta-skill for Claude Code (Anthropic CLI) that guides you through creating, testing, and iterating custom skills via structured conversation. Designed with LLM Council methodology: interview intent, generate draft, smoke-test immediately, refine until satisfied. A skill is just a markdown file — this tool embraces that simplicity.

updated May 2026

Project-Ghola

1
@lxrbckl-labs

Run a modular multi-agent Claude Code dev team (TPM/SWE/QA) from a VS Code extension. Spring 2026. Archived.

updated Aug 2026

mem-fusion

1
@muycoreano

Memory fusion for Claude Code — across sessions, cognitive layers, and machines. Personal memory today; group memory via the bundled Constellation extension in v0.3.0.

updated May 2026

crm-job-agent

1
@Konrad2237

Personal tool for finding Polish AI companies and tracking job applications. FastAPI · Next.js · Claude Haiku · SerpAPI.

updated Jun 2026

garmin-mcp

1
@Tyler-Irving

An MCP server that exposes your Garmin Connect health & fitness data to Claude — sleep, HRV, training load, body battery, and more — plus an opt-in tool to build strength workouts. Read-only by default.

updated Aug 2026

Cairn

1
@Su-Terry

Stop your AI coding agent from creating train_v3_final_FINAL.py. Cairn is a VS Code extension that marks every experiment with a stable waypoint—linking code, results, and intent—so you can find your way back when Claude Code or Cursor have been doing most of the typing.

updated Jun 2026

tabby-claude-status

1
@steven-pribilinskiy

Tabby plugin for visual + audio Claude Code status, plus a companion webapp (snapshot/restore tabs, MCP tool explorer, hook event sink)

updated Aug 2026

AccessLens-RAG-MarketAccessTool

1
@egehankocak99

AccessLens — Production RAG system for EU Market Access intelligence. Synthesizes evidence from PubMed, ClinicalTrials.gov & OpenFDA across EMA, G-BA, HAS, AIFA and more. Hybrid search · Cross-encoder reranking · Claude-powered generation · RAGAS evaluation.

updated May 2026
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