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cyanheads/pubchem-mcp-server

Search PubChem compounds, properties, safety data, bioactivity, and cross-references.

TypeScript Remote

★ 13 stars Last pushed 2026-10-28 License: Apache-2.0

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Review any command before running it. Package names and URLs come from the server's own registry entry.

Remote (streamable-http)

https://pubchem.caseyjhand.com/mcp Reachable (checked 2026-11-02)

Claude Code:

claude mcp add --transport http pubchem-mcp-server https://pubchem.caseyjhand.com/mcp

Or add to your MCP client config:

{
  "mcpServers": {
    "pubchem-mcp-server": {
      "url": "https://pubchem.caseyjhand.com/mcp"
    }
  }
}

Package (npm 0.8.0)

npx -y @cyanheads/[email protected]

Or add to your MCP client config:

{
  "mcpServers": {
    "pubchem-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/[email protected]"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_VALUE>"
      }
    }
  }
}

MCP_LOG_LEVEL — Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

Package (npm 0.8.0)

Package: npm @cyanheads/pubchem-mcp-server

MCP_TRANSPORT_TYPE — Selects the HTTP transport.
MCP_SESSION_MODE — HTTP session mode: stateless, stateful, or auto. Stateless is sufficient for PubChem; auto resolves to stateful.
MCP_HTTP_HOST — The hostname for the HTTP server.
MCP_HTTP_PORT — The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH — The endpoint path for the MCP server.
MCP_AUTH_MODE — Authentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_LOG_LEVEL — Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').