Periodic Table 2026 MCP Server

by changzhiai Your server? Claim it

answering

Periodic Table 2026 is answering right now. Last checked 8 min ago. It exposes 4 tools.

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

Uptime history 70 hours of history

70 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

649 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Periodic Table 2026 every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://theperiodictable.org/mcp

~/.codex/config.toml

[mcp_servers.periodic-table]
url = "https://theperiodictable.org/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "periodic-table": {
      "url": "https://theperiodictable.org/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "periodic-table": {
      "type": "http",
      "url": "https://theperiodictable.org/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

elements

list_elements

List elements, optionally filtered by category, block, period, group, state at 25 °C or a numeric property range, and sorted by a property. Without filters it lists all 118 elements in atomic-number order. Elements with no value for the range or sort property are left out.

search_elements

Find elements by symbol, atomic number, or full or partial name in any supported language. Use it when a name is misspelled, partial or in another language.

compare

compare_elements

Side-by-side numeric properties of 2-10 elements, with units.

element

get_element

Everything the Interactive Periodic Table knows about one element: classification, physical and chemical properties with units, electron configuration, discovery, a short summary and a longer introduction (uses, production, history, safety), plus the link to its page.

Endpoints

URL	Transport	State	Latency	Checked
https://theperiodictable.org/mcp	streamable-http	answering	577 ms	8 min ago

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Periodic Table 2026 — questions

Answers built from our own checks of this server.

What can Periodic Table 2026 do?

It exposes 4 tools, read directly from the server on our last check. Among them: compare_elements, get_element, list_elements, search_elements. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Periodic Table 2026 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 649 ms. The bar chart above shows every period we have measured.

How do I connect Periodic Table 2026?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Periodic Table 2026 need an API key?

No. Periodic Table 2026 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Periodic Table 2026?

It answers our handshake in 649 ms on average, which is faster than 16% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.