Chemcp

Renders 2D molecular structures and computes properties from SMILES notation using RDKit.js in your Claude chat. Exposes a single render_molecule tool that takes a SMILES string and returns an interactive viewer showing the SVG structure diagram plus molecular descriptors like weight, LogP, hydrogen bond donors and acceptors, TPSA, and rotatable bonds. The UI loads RDKit as WebAssembly client-side, so you get pharma-grade cheminformatics rendering without maintaining Python dependencies or a backend service. Works best in Claude Desktop where MCP Apps have full support. Reach for this when you need to visualize molecules in conversation, compare structures, or quickly check computed properties without leaving your chat window.