🔥 mse_ai_api - ChatGPT Proxy

🚀 Turn ChatGPT into a FREE OpenAI API in seconds (No API Key Required)

Watch the Full Tutorial on YouTube

Learn how to install, set up, and build AI workflows with mse_ai_api

The ultimate lightweight, open-source bridge to connect n8n with ChatGPT for FREE.

❤️ Sponsors

Kareem Adel — Owner & CEO at Wzila

🌟 Overview

mse_ai_api is a high-performance proxy server built with FastAPI and Playwright. It perfectly mimics the official OpenAI API structure, tricking ChatGPT's free web interface into acting as a legitimate API endpoint. It serves as a seamless drop-in replacement for n8n's OpenAI and HTTP nodes.

Recently completely rewritten, this version now supports Advanced AI Agent Tool Calling effortlessly, bypassing strict JSON validation errors.

✨ Key Features

💸 Zero API Costs: Uses ChatGPT's web interface via background browser automation.
⚡ Lightning Fast: Built on asynchronous Python (FastAPI).
🤖 Full n8n Agent Support: Supports full ChatGPT tool calling and JSON parsing.
🐳 Dockerized: Deploy flawlessly in seconds.
🔒 Secure: Protected by your own explicit API Secret Key.

⚙️ How It Works (Under the Hood)

This API relies on a clever technical architecture in main.py that makes it robust enough for production AI workflows:

AsyncBrowserThread (The Engine): Instead of spinning up a new browser per request, the API launches a single detached Python thread running an asynchronous Chrome browser via Playwright. It uses deep anti-bot bypass techniques (--disable-blink-features=AutomationControlled, spoofed user agents, webdriver hiding) so ChatGPT thinks it's a real user.
Smart Prompt Injection (format_prompt & format_tools_instruction): When n8n sends tools (using AI Agent nodes), the script dynamically rebuilds the user prompt. It forcefully injects precise system instructions that command ChatGPT to output only valid JSON. This guarantees that the web version of ChatGPT acts exactly like the programmatic API.
Regex parsing (parse_tool_calls): Once ChatGPT replies, the proxy scans the response for JSON blocks. If ChatGPT signals intent to use a tool, the proxy extracts it, formats it gracefully to meet OpenAI's strict function calling schema, and alerts n8n to execute the tool locally.
Flexible Endpoints: It natively supports both /v1/chat/completions (Legacy n8n setups) and /v1/responses (Modern Responses API) ensuring broad compatibility.

🛠️ Quick Start

1. Using Docker (Highly Recommended)

Deploying with Docker guarantees that all dependencies (including headless Chrome and Google fonts) are perfectly configured.

# Clone the repository
git clone https://github.com/MohamedElsayed-debug/mse_ai_api.git
cd mse_ai_api

# Run with Docker Compose
docker-compose up --build -d

The server will now be listening silently on http://localhost:7777.

2. Manual Installation

Requires Python 3.10 (Recommended).

pip install -r requirements.txt
python main.py

🔌 Connecting to n8n

Using the HTTP Node

Add an HTTP Request node in your n8n workflow.
Set Method to POST.
Set URL to: http://0.0.0.0:7777/v1/chat/completions (or /v1/responses).
Add Header: Authorization: Bearer change-secret-key-2026.
Body (JSON):

{
  "messages": [{"role": "user", "content": "Hello, AI!"}],
  "model": "gpt-4o-mini"
}

Using the OpenAI Node (Recommended)

In n8n, create a new OpenAI Account credential.
Set the Base URL to exactly: http://0.0.0.0:7777/v1
Set the API Key to your server's secret (change-secret-key-2026 by default).
You can now use this credential across any AI Agent or LLM node seamlessly!

💎 Need Enterprise Power? Upgrade to PRO!

mse_ai_api is amazing for personal workflows, but scaling requires infrastructure. Meet the PRO Version — built on Django for multi-tenant SaaS environments.

Feature	mse_ai_api (This Repo) 🚀	PRO (Django Version) 👑
Free ChatGPT Web Backend	✅	✅
Advanced n8n Tool Calling	✅	✅
Image Analysis (HTTP URL)	❌	✅
Image Analysis (Base64/Binary)	❌	✅ Included
GUI Admin Dashboard	❌	✅ Included
Multi-User Management	❌	✅ Track Hundreds of Users
Usage Statistics & Logging	❌	✅ Detailed Database Logs
Token Tracking & Quotas	❌	✅ Hard Limits per Key
Commercial Support	❌	✅ Priority Support

🚀 Get the PRO Version

Perfect for startup SaaS platforms or enterprise-grade process automations.

👉 Interested in purchasing the source code or requesting a custom integration? Let's Connect!

📄 License

This project is open-sourced under the MIT License. See the LICENSE file for details.