MCP server

Oqmd

io.github.pipeworx-io/oqmd

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

OQMD (Open Quantum Materials Database) MCP.

Website Source

At a glance

Type

MCP server

Publisher

pipeworx.io (verified by the MCP Registry)

Status

Working at last check

Tools

45

Token cost

About 27,032 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http oqmd https://gateway.pipeworx.io/oqmd/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.oqmd]
url = "https://gateway.pipeworx.io/oqmd/mcp"

Gemini CLI

{"mcpServers":{"oqmd":{"httpUrl":"https://gateway.pipeworx.io/oqmd/mcp"}}}

Cursor

{"mcpServers":{"oqmd":{"url":"https://gateway.pipeworx.io/oqmd/mcp"}}}

VS Code

{"servers":{"oqmd":{"type":"http","url":"https://gateway.pipeworx.io/oqmd/mcp"}}}

Antigravity

agy mcp add oqmd https://gateway.pipeworx.io/oqmd/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"oqmd","server_url":"https://gateway.pipeworx.io/oqmd/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"oqmd","server_url":"https://gateway.pipeworx.io/oqmd/mcp"}

Tools

• get_material ~151 tokens
  Fetch a single OQMD material by its entry_id (e.g. 16525 = the Pbcn polymorph of Fe2O3). Returns formation energy (eV/atom), stability above hull, band gap, space group, prototype, cell volume, atom/element counts, ICSD id, and generic composition. Keyless.
• search_materials ~384 tokens
  Search the Open Quantum Materials Database for DFT-computed inorganic materials by composition and/or constituent elements, with optional band-gap and thermodynamic-stability filters. Returns formation energy (eV/atom), energy above the convex hull (stability), band gap, space group, and prototype.
• stable_phases ~194 tokens
  List the ground-state (on-hull) phases of a chemical system — the thermodynamically stable compounds in OQMD for a given set of elements. e.g. "Fe-O" returns FeO, Fe2O3, Fe3O4. Restricts to materials made ONLY of the given elements with stability <= ~0 (on the convex hull). Keyless.

Browse

• GitHub tools
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