Pubchem for Claude Code

io.github.pipeworx-io/pubchem

PubChem MCP — NIH chemistry compound database (no auth)

client:Claude Code transport:streamable-http

Install Pubchem in Claude Code

run in your project directory

claude mcp add --transport http pubchem https://gateway.pipeworx.io/pubchem/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs