pubchem-mcp

The server appears well-designed with robust input validation (using `isValid...Args` functions) for all implemented tools, which helps prevent common injection vulnerabilities when interacting with the external PubChem PUG REST API. All API calls to PubChem use `encodeURIComponent` for query parameters, further enhancing safety. There are no `eval` statements, explicit dangerous `child_process` calls (beyond the Node.js runtime itself), or direct sensitive file system operations detected in the provided source code. No hardcoded secrets (like API keys) are present, aligning with PubChem's public API policy. The server acts as a proxy, and its overall security model relies on the inherent security of the PubChem API. Potential for high volume data retrieval (e.g., from similarity searches or batch lookups with many records) exists, which could impact server resources if not managed by the caller, but this is an operational concern rather than a code vulnerability. Unimplemented methods gracefully return an `ErrorCode.MethodNotFound` error.