How many requests can I send per second?
PubChem API guidelines limit to 5 requests per second and 400 requests per minute. No API key is required, but respectful usage is encouraged.
@Augmented-Nature
基本信息
A comprehensive Model Context Protocol (MCP) server for accessing the PubChem chemical database. This server provides access to over 110 million chemical compounds with extensive molecular properties, bioassay data, and chemical informatics tools.
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Pubchem Mcp Server is an unofficial Model Context Protocol (MCP) server for querying the PubChem chemical database. It provides access to over 110 million compounds, molecular properties, bioassay data, and chemical informatics tools, serving researchers and developers in drug discovery, toxicology, and computational chemistry.
Install via npm, build with npm run build, then start with npm start. Invoke tools such as search_compounds, get_compound_info, or search_similar_compounds by sending JSON‑RPC arguments. Resource templates like pubchem://compound/{cid} allow direct data retrieval.
PubChem API guidelines limit to 5 requests per second and 400 requests per minute. No API key is required, but respectful usage is encouraged.
The server is built with TypeScript and requires Node.js. Dependencies include Axios for HTTP requests and the MCP SDK for protocol compliance.
All data is fetched from the PubChem REST API, which aggregates over 110 million compounds, 1.5 million bioassays, and cross‑references from 500+ external databases.
No. The PubChem API is open and does not require an API key or any authentication tokens.
The `batch_compound_lookup` tool supports up to 200 compounds per operation, enabling efficient retrieval of properties, safety data, or other descriptors.

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