fbchat-v2 2.1.3

Modern, account-based Python library for the unofficial Facebook Messenger API — with E2EE support.

fbchat-v2

A modern, unofficial Python library for the Facebook Messenger API — driven by a real user account (cookies / login). Now with End-to-End Encryption (E2EE) support for 1-on-1 Messenger chats via a Go bridge.

• Repository: https://github.com/MinhHuyDev/fbchat-v2
• Documentation: DOCS.md · FLOWCHART.md
• Changelog: CHANGELOG.md
• Issues: https://github.com/MinhHuyDev/fbchat-v2/issues

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⚠️ Disclaimer

This is not an official Facebook product. Facebook provides an official Messenger Platform API here. fbchat-v2 differs in that it authenticates as a real user account via cookies or username/password, which carries inherent risks (account flags, rate-limits, ToS considerations). Use at your own risk and never share your cookies/tokens.

Since November 2024, all 1-on-1 Messenger chats are End-to-End Encrypted by default. fbchat-v2 v2.1.0 ships an E2EE listener (listeningE2EEEvent) that decrypts those messages by spawning a Go subprocess (fbchat-bridge-e2ee); group chats continue to use the MQTT WebSocket listener (listeningEvent).

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✨ Features

Authentication

• 🔐 Login via username/password (with optional 2FA TOTP) or session cookies
• 🍪 Session reuse — no re-login on every run

Messaging

• 📥 Receive messages from both users and group threads
• 🔒 E2EE listener for 1-on-1 Messenger chats (Secret Conversations / Labyrinth) via Go bridge
• 📤 Send text, attachments, stickers, user mentions
• 🔍 Search messages and threads
• ↩️ Reactions, unsend, message-request handling
• 📡 Real-time event listener

Threads & Groups

• 👥 Create groups, add admins, change name / emoji / nickname
• 📊 Polls, full thread metadata

Facebook actions (_features._facebook)

• 📝 Create posts, edit bio, profile registration
• 👤 User search, profile info, notification management
• 🚫 Block/unblock, Marketplace and Professional mode

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📦 Installation

Default install (group chats only)

pip install fbchat-v2

This pulls in requests, paho-mqtt, attrs, and pyotp. The MQTT-based group-message listener (listeningEvent) works out of the box.

Optional: enable E2EE for 1-on-1 chats

The E2EE listener requires a separate Go binary (fbchat-bridge-e2ee) that PyPI cannot ship. Build it once from source:

# 1) Install Go ≥ 1.24 from https://go.dev/dl/
# 2) Clone the bridge from the upstream repo
git clone https://github.com/MinhHuyDev/fbchat-v2
cd fbchat-v2/bridge-e2ee
git clone https://github.com/mautrix/meta.git ./meta
go mod tidy

# Windows
go build -ldflags="-s -w" -o fbchat-bridge-e2ee.exe .

# Linux / macOS
go build -ldflags="-s -w" -o fbchat-bridge-e2ee .

Then point the library at the binary via an environment variable:

# Windows (PowerShell)
$env:FBCHAT_E2EE_BIN = "C:\path\to\fbchat-bridge-e2ee.exe"

# Linux / macOS
export FBCHAT_E2EE_BIN=/path/to/fbchat-bridge-e2ee

The [e2ee] extra is reserved for a future automatic-download helper:

pip install "fbchat-v2[e2ee]"   # currently a no-op placeholder

Roadmap: v2.2.0 plans to publish prebuilt bridge binaries on GitHub Releases and auto-download them on first use.

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🚀 Quick Start

dataGetHome(setCookies) takes a single positional cookie string — exactly the value of the Cookie: header you would copy from your browser DevTools (e.g. "c_user=...; xs=...; fr=...; datr=...;"). It is not a dict and there is no cookies= keyword.

Group chat listener (no Go required)

import threading
from fbchat_v2 import dataGetHome, listeningEvent

COOKIE = "c_user=100012345678; xs=...; fr=...; datr=...;"

# 1) Bootstrap the session (scrapes fb_dtsg, jazoest, FacebookID, … from facebook.com)
dataFB = dataGetHome(COOKIE)

# 2) Start the MQTT listener
listener = listeningEvent(dataFB)
listener.get_last_seq_id()
threading.Thread(target=listener.connect_mqtt, daemon=True).start()

# listener.bodyResults is mutated in place — poll it from the main thread.

1-on-1 E2EE listener (requires Go bridge)

import threading
from fbchat_v2 import dataGetHome, listeningE2EEEvent

COOKIE = "c_user=100012345678; xs=...; fr=...; datr=...;"

dataFB = dataGetHome(COOKIE)

listener = listeningE2EEEvent(
    dataFB,
    log_level="warn",          # "none" | "error" | "warn" | "info" | "debug"
    e2ee_memory_only=True,     # set False + device_path="./device.json" to persist keys
    enable_e2ee=True,
    binary_path=None,          # auto-resolves; or pass an explicit path
)
listener.get_last_seq_id()
threading.Thread(target=listener.connect_mqtt, daemon=True).start()

# listener.bodyResults uses the SAME schema as listeningEvent —
# you can swap the import without changing your event handler.

Decorator-style handler (E2EE)

@listener.on_message
def on_msg(evt):                    # evt = {"type": "...", "data": {...}, "timestamp": ms}
    if evt["type"] == "e2eeMessage" and evt["data"].get("text") == "ping":
        listener.send_e2ee_message(
            chat_jid=evt["data"]["chatJid"],
            text="pong",
            reply_to_id=evt["data"]["id"],
            reply_to_sender_jid=evt["data"]["senderJid"],
        )

1-on-1 E2EE sender — sendingE2EEEvent (new in 2.1.3)

sendingE2EEEvent is the send-side companion to listeningE2EEEvent. It speaks the same Go bridge and returns the same {"success": 1, "payload": {...}} / {"error": 1, "payload": {...}} schema as the plain HTTP _send.api, so your bot code does not need a special branch for E2EE replies.

Mode A — reuse the listener's bridge (recommended). No extra pairing handshake, no "new device" notification on the peer:

import threading
from fbchat_v2 import dataGetHome, listeningE2EEEvent, sendingE2EEEvent

dataFB   = dataGetHome(COOKIE)
listener = listeningE2EEEvent(dataFB)
threading.Thread(target=listener.connect_mqtt, daemon=True).start()
# ... wait for the "e2eeConnected" event before sending ...

sender = sendingE2EEEvent(listener=listener)

@listener.on_message
def on_msg(evt):
    if evt["type"] == "e2eeMessage" and evt["data"].get("text") == "ping":
        result = sender.reply(evt["data"], "pong")
        # → {'success': 1, 'payload': {'messageID': '3EB0…', 'timestamp': 1715000000000}}

Mode B — standalone (own bridge subprocess). Useful for one-shot scripts; supports Python's with statement:

from fbchat_v2 import dataGetHome, sendingE2EEEvent

dataFB = dataGetHome(COOKIE)

with sendingE2EEEvent(
    dataFB=dataFB,
    log_level="warn",          # "none" | "error" | "warn" | "info" | "debug"
    device_path="./device.json",
    e2ee_memory_only=False,    # persist Signal keys across runs
    binary_path=None,          # auto-resolves; or pass an explicit path
) as sender:
    sender.send(
        chat_jid    = "[e-mail]",
        contentSend = "hello E2EE",
    )

sendingE2EEEvent.send(...) reference

Argument	Type	Description
chat_jid	str	Signal-style JID. Always copy from evt["data"]["chatJid"] — do not build it from a numeric threadID. DM = <id>@s.whatsapp.net, group = <id>@g.us.
contentSend	str	Message body.
replyMessage	str	(Optional) id of the message you are quote-replying to.
replySenderJid	str	(Optional, required if replyMessage is set) JID of the original sender.

Returns — mirrors _send.api.send:

• ✅ {"success": 1, "payload": {"messageID": str, "timestamp": int}}
• ❌ {"error": 1, "payload": {"error-decription": str, "error-code": "bridge_error" | "not_connected"}}

The typo error-decription is intentional — it preserves the existing _send.api contract so callers can use one error handler for both.

Convenience methods

Method	Use
sender.reply(evt_data, contentSend)	Quote-reply in one line — auto-fills chat_jid, replyMessage, replySenderJid from a listener event.
sender.connect(*, enable_e2ee=True, timeout=120)	Standalone-only — spawn bridge, pair with Meta.
sender.close()	Standalone-only — stop the owned bridge subprocess.
with sender: ...	Standalone context-manager — auto connect() + close().

⚠️ Passing both listener= and dataFB= raises ValueError. Pick one. Reuse mode is strongly preferred — each standalone process must re-pair with Meta and pops a new device alert on the peer's account.

📦 E2EE media sending (SendE2EEImage / Video / Audio) is implemented in the Go bridge but not yet exposed by the Python wrapper — text only for now.

Demo — receiving decrypted 1-on-1 E2EE messages

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📂 Package Layout

Installed Python package (importable as fbchat_v2):

fbchat_v2/
├── __init__.py                 # Re-exports: dataGetHome, listeningEvent, listeningE2EEEvent
├── py.typed                    # PEP 561 marker
├── _core/                      # Session, login, low-level helpers
│   ├── _facebookLogin.py
│   ├── _session.py
│   └── _utils.py
├── _features/
│   ├── _facebook/              # Posts, bio, search, notifications, blocking, marketplace, …
│   │   ├── _blocking.py
│   │   ├── _changeBio.py
│   │   ├── _createPost.py
│   │   ├── _get_user_info.py
│   │   ├── _marketplace.py
│   │   ├── _notification.py
│   │   ├── _professional.py
│   │   ├── _registerOnProfile.py
│   │   └── _search.py
│   └── _thread/                # Group/thread admin operations
│       ├── _addAdmin.py
│       ├── _all_thread_data.py
│       ├── _changeEmoji.py
│       ├── _changeNameThread.py
│       └── _changeNickname.py
└── _messaging/
    ├── _attachments.py
    ├── _listening.py           # MQTT — group messages
    ├── _listening_e2ee.py      # Go bridge — 1-on-1 E2EE listener
    ├── _message_requests.py
    ├── _reactions.py
    ├── _send.py                # HTTP sender (groups + plain DMs)
    ├── _send_e2ee.py           # Go bridge — 1-on-1 E2EE sender (new in 2.1.3)
    └── _unsend.py

Public API

The top-level fbchat_v2 namespace re-exports the most common entry points:

Symbol	Source	Purpose
dataGetHome	fbchat_v2._core._session	Build the session object from cookies / login
listeningEvent	fbchat_v2._messaging._listening	MQTT listener for group messages
listeningE2EEEvent	fbchat_v2._messaging._listening_e2ee	E2EE listener for 1-on-1 messages
sendingE2EEEvent	fbchat_v2._messaging._send_e2ee	E2EE sender for 1-on-1 messages (new in 2.1.3)
__version__	fbchat_v2	Package version string

Submodules (fbchat_v2._features._facebook._createPost, etc.) can be imported directly for fine-grained access.

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🔧 System Requirements

Component	Minimum	Recommended	Notes
Python	3.10	3.11 / 3.12	Required
Go toolchain	1.24	1.24+	Only for E2EE — to build fbchat-bridge-e2ee
Git	any	latest	Needed for go mod tidy to fetch mautrix/meta
OS	Windows / Linux / macOS	—	—
RAM	256 MB	1 GB+	Bridge process uses ~80–150 MB when active
Network	Stable connection to facebook.com and edge-chat.facebook.com	—	—

Python dependencies (auto-installed by pip):

requests   >= 2.31.0   # HTTP client
paho-mqtt  >= 1.6.1    # MQTT WebSocket for listeningEvent
attrs      >= 23.2.0   # Data classes
pyotp      >= 2.9.0    # 2FA TOTP for username/password login

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🏗 Architecture

flowchart LR
    A[Your bot / app] --> B[fbchat_v2._core<br/>session • login • utils]
    B --> C[fbchat_v2._features<br/>facebook • thread]
    B --> D[fbchat_v2._messaging<br/>send • listen • reactions]
    D -.spawns.-> E[fbchat-bridge-e2ee<br/><i>Go subprocess, optional</i>]
    C --> F[(Facebook<br/>internal endpoints)]
    D --> F
    E --> F

Three clear layers:

Layer	Path	Responsibility
Core	fbchat_v2._core	Session management, login, request helpers, low-level utilities
Features	fbchat_v2._features	Facebook & thread business logic (posts, groups, profile, …)
Messaging	fbchat_v2._messaging	Send / receive / react / listen / unsend

Full request flow diagrams live in FLOWCHART.md.

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🗺 Roadmap

• E2EE decryption for 1-on-1 Messenger chats (v2.1.0 — Go bridge)
• Native async / await API
• Prebuilt bridge binaries published on GitHub Releases (auto-download)
• Full type hints across the public API
• Pluggable storage backend for sessions
• Integration test suite & CI

Have an idea? Open an issue.

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🤝 Contributing

Contributions are welcome! See CONTRIBUTING guide and CODE_OF_CONDUCT.md.

1. Fork the repo and create a feature branch (feat/<name>).
2. Follow the existing 3-layer architecture (_core → _features / _messaging).
3. Use Conventional Commits — feat:, fix:, docs:, refactor:, …
4. Open a PR with a clear description and reproduction steps for bug fixes.
5. Never commit secrets — config.json, cookies, tokens, .venv, etc.

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🌟 Acknowledgements

After 4 years of development, this project would not exist without its community.

Community contributors

tomdev112 · syrex1013 · Kheir Eddine · 陶世玉 · Jihadi John · Bắc Trịnh · Quang Trần · Minh Trần Ngọc · Victor Knutsenberger · Hoàng Lân · Kareem Adel Abomandor · @lluevy · @phuncnheo · @minhphatnw · @khanh235a · @chapesh1 · @klongg13 · @seafibrahem · @agent1047 · @stefekdziura

Upstream open-source projects powering v2.1.0 (E2EE)

• mautrix/meta — Meta Labyrinth / Lightspeed implementation in Go
• tulir/whatsmeow — Signal Protocol (Curve25519, Double Ratchet, Sender Keys, Noise XX) in Go
• yumi-team/meta-messenger.js — design reference for the JSON-RPC bridge
• mautrix/go — Matrix/Meta client utilities

AI assistants

• Claude Opus 4.7 (Anthropic) — code review, documentation, refactoring
• Codex 5.3 (OpenAI) — boilerplate and RPC prototyping

If you have contributed and are missing from this list, please open an issue or PR.

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📜 License

Distributed under the MIT License. See LICENSE for details.

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Made with ❤️ by MinhHuyDev · Telegram