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PubChem MCP — NIH chemistry compound database (no auth)
MCP endpoint :https://gateway.pipeworx.io/pubchem/mcp · website · measurements and detailsSearch PubChem compounds, properties, safety data, bioactivity, and cross-references.
MCP endpoint :https://pubchem.caseyjhand.com/mcp · website · measurements and detailsLook up chemical compound properties and synonyms from PubChem. No key required.
Package npm :@mrfentmen/pubchem-mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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