A curated collection of unofficial, reverse-engineered, private/user-level API libraries, clients, userbots, hosted services, and bridges for major messengers.
- These projects/services usually violate the platform's Terms of Service.
- High risk of account bans, sudden protocol breaks, or legal issues.
- Most are maintained sporadically (or are commercial hosted services) — always check status, reviews, last updates, and risks.
- Use responsibly, ideally only for personal/educational/research purposes.
WhatsApp's multi-device protocol (WhatsApp Web style) is one of the most actively reversed/hosted.
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Baileys
Lightweight, multi-device WhatsApp Web API (TypeScript/Node.js, no browser automation)
https://github.com/WhiskeySockets/Baileys -
whatsmeow
High-performance Go library implementing the multi-device protocol
https://github.com/tulir/whatsmeow -
WAHA
WhatsApp HTTP API server with multiple backends (WEBJS, NOWEB, GoWS)
https://github.com/devlikeapro/waha -
Evolution API
Ready-to-deploy REST API wrapper/server for WhatsApp (multi-engine support)
https://github.com/EvolutionAPI/evolution-api -
WaSenderAPI (hosted service)
Affordable unofficial WhatsApp API platform (hosted, with SDKs for Node.js/Python/Laravel). Supports unlimited messaging, multi-sessions, webhooks, real-time events, various message types (text/media/contacts/location). No Meta approval needed; starts at $6/month. Uses your own WhatsApp sessions (Web protocol emulation).
Website: https://wasenderapi.com/
Docs: https://wasenderapi.com/api-docs
SDKs: npm (wasenderapi), PyPI (wasenderapi), Packagist (wasenderapi/wasenderapi-laravel) -
mautrix/whatsapp
Matrix puppeting bridge (connect WhatsApp to Matrix ecosystem)
https://github.com/mautrix/whatsapp
Telegram's MTProto (user/client protocol) is well-documented unofficially and has excellent libraries.
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Telethon
Popular asyncio-based Python MTProto client (great for userbots)
https://github.com/LonamiWebs/Telethon -
Pyrogram
Modern, elegant Python MTProto framework
https://github.com/pyrogram/pyrogram -
WTelegramClient
Full-featured MTProto client in C# / .NET
https://github.com/wiz0u/WTelegramClient -
gotd/td
High-performance Go implementation of MTProto
https://github.com/gotd/td
Signal is highly secure and aggressively fights unofficial clients → few stable options remain.
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signald
Daemon with REST/JSON-RPC/dbus interface (most used for bridging)
https://gitlab.com/signald/signald -
signal-cli
Java-based CLI + REST daemon (unofficial, widely used)
https://github.com/AsamK/signal-cli -
libsignal
Official crypto library (Rust), but not a full client/protocol reverse
https://github.com/signalapp/libsignal
Very closed Korean messenger; mostly automation via bridges or UI/DB hooks.
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remote-kakao
Node.js bridge for bot creation via MessengerBot (UDP-based)
https://github.com/remote-kakao/core -
kakaocli
CLI client using UI/DB automation (Mac-focused)
https://github.com/silver-flight-group/kakaocli
Official Messaging API exists for Official Accounts, but full user-level reverses are mostly dead after protocol changes.
- Legacy Thrift-based reverses (2015–2020 era, mostly read-only/broken now)
https://github.com/ruyaoyao/LINE-instant-messenger-protocol
https://github.com/bobwei/Line-Unofficial-API
Living full RE clients are rare in 2026.
Extremely closed; public reverses die quickly due to aggressive enforcement.
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wechat-dump
Tools for dumping chat history (Android rooted/analysis focused)
https://github.com/ppwwyyxx/wechat-dump (and active forks) -
wxhelper
Hook/injection-based reverse for WeChat (popular in China)
https://github.com/ttttupup/wxhelper -
Research/protocol analysis
Citizen Lab WeChat reports and dumps
https://github.com/citizenlab/wechat-security-report
Special section for Twitter/X, as it has a vibrant ecosystem of reverse-engineered GraphQL/internal endpoints (often used for clients, scrapers, feature unlocks).
- AwesomeTwitterUndocumentedAPI
Curated list of awesome Twitter Undocumented API resources: implementations (TypeScript/Python/Dart), documentation, tools (OpenAPI specs, feature flag editors), applications (old TweetDeck restore, tweet archiving), and deprecated projects. Focuses heavily on GraphQL-based internal APIs.
https://github.com/fa0311/AwesomeTwitterUndocumentedAPI
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mautrix organization
Bridges for WhatsApp, Telegram, Signal, Discord, etc. to Matrix
https://github.com/mautrix -
reversing-unofficial-APIs
General resources/guides for reversing unofficial APIs (mobile/web)
https://github.com/ropcat/reversing-unofficial-APIs
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awesome-reverse-engineering
Broad list of RE tools (includes mobile/protocol stuff)
https://github.com/alphaSeclab/awesome-reverse-engineering -
whatsapp-web-reveng
Classic breakdown of WhatsApp Web protocol (2017, still educational)
https://github.com/sigalor/whatsapp-web-reveng
Found an active 2025–2026 project? Submit a PR!
Especially welcome: updates for Asian messengers (KakaoTalk, LINE, WeChat), new multi-device implementations, Twitter/X internals, or any dead-project alternatives.
License: CC0 (public domain), but respect each linked project's license.
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