MCP Servers for Private APIs (AI Tools & LLM Clients): open-source projects that exist because someone reverse engineered a closed product, sorted by GitHub stars.
MCP server for Xiaohongshu (RedNote): login, publish, search, comment
WhatsApp MCP server built on whatsmeow web multidevice protocol
CLI and MCP server for Gemini Notebook (NotebookLM) via its internal RPC API
LinkedIn MCP server for profiles, companies, jobs and messages via browser session
MCP server letting agents query Google NotebookLM with citations
Slack MCP server that can use browser session tokens and the undocumented Slack Edge API
MCP server for Garmin Connect data via unofficial API
MCP server for publishing and managing Xiaohongshu creator content from AI clients
Douyin MCP extracting watermark-free video links and transcripts
MCP server for WeChat Read (WeRead) shelf and notes
Lets coding agents drive logged-in ChatGPT, Claude, Gemini, Grok, Perplexity web sessions via MCP
Xiaohongshu MCP server with reverse-engineered x-s/x-t request signing
MCP server for the Xiaohongshu creator center
MCP server that lets AI agents use QQ, WeChat and Bilibili accounts
MCP server for China Railway 12306 ticket and station queries
MCP server for macOS Messages: read chat.db and send iMessages
Lets AI assistants read and reply to WeChat on desktop
WhatsApp MCP server for reading and sending personal messages
MCP server controlling Bambu Lab 3D printers with slicing and print management
Agent skills covering all Xiaohongshu interfaces for crawling and posting
NotebookLM over MCP plus local REST API, audio/video generation
MCP server reading and managing a NetEase Cloud Music account
LinkedIn MCP server scraping people, companies and jobs
MCP server and Anthropic-compatible API over the Perplexity web interface
Bilibili video search MCP service
MCP server for Bilibili web API operations
TrainingPeaks MCP server using the private web API, no API approval needed
Xiaohongshu MCP server for note and user search
MCP server driving Perplexity Comet browser over CDP
MCP server to read, search, edit and export Apple Notes on macOS
MCP server exposing WeRead books, highlights and notes
Bilibili MCP with search, comments, subtitles and danmaku
Python Xiaohongshu MCP for automated posting of notes and videos
MCP server with read/write access to Whoop data via the private reverse-engineered API
MCP server reading the Apple Notes SQLite store
MCP server integrating AI tools with LINE Desktop to read and send messages
NetEase Cloud Music MCP for song requests, lyrics and playlists
Perplexity AI MCP using the web API, no API key
Unofficial MCP server for Alza.cz: product search, reviews, account, cart and checkout
MCP server for searching Ozon marketplace products and prices
MCP server for Mijia devices built on the unofficial MijiaAPI
WhatsApp MCP server in TypeScript on Baileys
MCP server for Garmin Connect activities, health metrics and sleep via the unofficial API
MCP server for Stockbit (Indonesia) market data, charts and read-only portfolios via its app API
Unofficial MCP and CLI for TradingView's internal API
MCP server connecting Claude Code to Perplexity Comet browser
Unofficial MCP server to search, cart and order on Blinkit
Unofficial MCP server for OpenEvidence medical search through the user's browser session
MCP server for the WeChat desktop client
Unofficial MCP for Mobbin's design library, no public API required
Maintained WhatsApp MCP with 26 tools, webhooks and Docker
Read-only MCP server for Robinhood portfolio research
Unofficial MCP server for T-Bank (Tinkoff) mobile banking private API
MCP server querying and exporting the macOS Photos library database
MCP server reading macOS iMessage chat.db
Search and read Messages history from MCP clients
MCP server for Signal messaging via signal-cli
WhatsApp MCP server with 61 tools over Baileys
Unofficial Substack MCP server that posts and edits through the browser session
Unofficial MCP server for ordering Yandex Lavka groceries
Use a Perplexity subscription with MCP via a web wrapper
MCP server for accessing reMarkable tablet data
MCP server to search Douyin users and read/send direct messages
NotebookLM MCP with 32 tools for notebooks, sources and studio content
WeChat chat MCP tool based on WeChatFerry hooking
Unofficial Twitter/X MCP server using cookie auth
Google Hotels MCP server and library via reverse-engineered batchexecute
Local-first MCP server for Garmin Body Battery, HRV, sleep and training data
Unofficial local LinkedIn MCP server for profile, job, company and inbox reads
Unofficial Robinhood API map with CLI and MCP server
MCP server for reading and sending Instagram DMs via the private API
MCP crawler extracting data from Meta Threads
Unofficial MCP server for the 104.com.tw Taiwan job board
Unofficial MCP server for CookUnity meal delivery: menus, carts, orders and skips
Unofficial Substack MCP with publishing and analytics
Unofficial Trenitalia MCP using viaggiatreno endpoints
Unofficial MCP server for the Eight Sleep mobile-app API
Unofficial MCP for Google Flow (Veo / Nano Banana) through your Chrome session
Unofficial MCP and async SDK for SberBank Online with browserless auth
MCP server querying Perplexity Pro via WebUI session token
Notion MCP server via the private API (token_v2), no integration token