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mcp/harbor
Verified official

Periodic Table 2026 MCP

v1.0.6

io.github.changzhiai/periodic-table

Interactive periodic table with all 118 elements. Properties, comparisons, and more.

transport:streamable-http tools:4
Website

Target client

run in your project directory 

claude mcp add --transport http periodic-table https://theperiodictable.org/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

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

get_element Read-only

get element

search_elements Read-only

search elements

list_elements Read-only

list elements

compare_elements

compare elements

All 4 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.