About Qr_check_server
A small tool that improves WeChat QR code recognition accuracy on large images. It first locates and crops small QR codes with a trained YOLOv8 model, then decodes them with WeChat's open-source wechat_qrcode model. It offers an HTTP API and an MCP server.
Key features
- 01Two-stage detection: locate, then decode
- 02YOLOv8-based QR code localization
- 03Content extraction with wechat_qrcode
- 04Returns QR content and bounding box coordinates
- 05HTTP API and MCP server interfaces
Use cases
- 01Reading small QR codes in large images
- 02Detecting QR content and position from an image URL
- 03Providing QR recognition as a tool to MCP clients
MCP support
This project is an MCP server that exposes QR code detection over an SSE endpoint, and it includes a sample MCP client script.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.
Tools
Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.
Details
From the project READMEyolo_wechat_qrcode
提高微信二维码识别精确率的小工具
原理
二阶段检测:
首先使用训练好的二维码目标识别yolov8模型，识别大图片中小二维码的位置，并裁剪出来
然后使用微信开源的wechat_qrcode模型，进行二维码检测，提取二维码内容
提高了直接使用二维码检测部分大图小二维码场景下无法识别的问题
试用
pip install -r requirements.txt
python test.py
运行结果
0: 384x640 1 qr_code, 268.3ms Speed: 3.0ms preprocess, 268.3ms inference, 2.0ms postprocess per image at shape (1, 3, 384, 640) 检测到并识别到的二维码: 内容: http://weixin.qq.com/r/mp/YEk0LAPEkF7vrUdP9xxy 位置 (xmin, ymin, xmax, ymax): [564, 286, 610, 332]
api接口
python app.py
测试 http://127.0.0.1:8080/check?url=
MCP SERVER
python mcp_qr_check_server.py
sse地址：http://0.0.0.0:8000
MCP CLIENT
python mcp_client.py
Comments
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An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.