Crystallography Open DB

live ChemistryScience

Crystallography Open Database (COD) MCP.

3 tools

0ms auth

free tier 50 calls/day

Tools

search_structures

Search the Crystallography Open Database (COD), an open repository of crystal structures (inorganic, organic, metal-organic, and mineral). Search by compound name (free text), chemical formula, or min

No parameters required.

▶ Try it

Response

get_structure

Look up a single crystal structure in the Crystallography Open Database (COD) by its numeric COD ID (e.g. "1009000"). Returns the compound/mineral name, chemical formula, space group, full unit-cell p

No parameters required.

▶ Try it

Response

get_cif

Fetch the full CIF (Crystallographic Information File) for a COD structure by its numeric COD ID — the actual machine-readable structure: symmetry operations and the atom sites (element, fractional x/

No parameters required.

▶ Try it

Response

Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools

bash

curl -X POST https://gateway.pipeworx.io/crystallography/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Call a tool

bash

curl -X POST https://gateway.pipeworx.io/crystallography/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"search_structures","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript

import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("search_structures", {});

ask_pipeworx

// Or ask in plain English:
const answer = await px.ask("crystallography open database (cod) mcp");

Related packs

Other Pipeworx packs in the same categories (Chemistry, Science):

MCP Config

claude_desktop_config.json

{
  "mcpServers": {
    "pipeworx-crystallography": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://gateway.pipeworx.io/crystallography/mcp"
      ]
    }
  }
}