A local MCP toolbox gives Claude 35 exact tools for error-prone tasks
toolbox-mcp is a local tool set that lets Claude hand exact tasks to real functions instead of guessing. It targets work where a small mistake matters, such as large-number math, time zone , reading a PDF Claude cannot open, making QR codes, and hashing passwords. It includes 35 tools, covering PDF text extraction, exact math, unit , , image , resizing, , cropping, watermarking, PDF merge, split, and rotation, QR codes, HMAC, bcrypt, regular expression extraction, text diff, and JSON or CSV handling.
The tools run on the user’s own machine and do not use the network, so files and data stay local. Setup is done by adding a command that runs `npx -y toolbox-mcp`. It works with and Claude Code, and is also described as usable with Cursor, VS Code, and .
The project is on GitHub under the and is free to use.
Key points
- Claude can call local functions for exact tasks instead of relying on a guessed answer.
- The tool set covers PDFs, images, QR codes, math, time zones, text comparison, JSON, and CSV work.
- It runs without network access, so files and data stay on the user’s machine.
- It is presented as compatible with , Claude Code, Cursor, VS Code, and .
- The project is free and under the .