Datomic MCP Server

Built with Modex.

Set environment variable DATOMIC_URI in your MCP config. Example below.

Build Uberjar & Configure Claude Desktop

{
  "mcpServers": {
    "modex-datomic-mcp": {
      "command": "java",
      "args": ["-jar", "/Users/petrus/code/datomic-mcp/target/theronic-datomic-mcp-0.3.0.jar"],
      "env": {"DATOMIC_URI": "<your datomic URI here>"}
    }
  },
  "globalShortcut": ""
}

Datomic API Support

• Concurrent queries (async message handling since Modex 0.3.0)
• datomic.api/q
• datomic.api/datoms
• datomic.api/with (via q-with tool)
• datomic.api/pull
• datomic.api/pull-many
• datomic.api/entity
• datomic.api/touch
• datomic.api/entid
• datomic.api/transact – not sure if good idea :)
• Send Progress Messages Connection Progress
• Better cursor-based pagination
• Stable db basis (currently each query runs (d/db conn)) – easy to fix.
• d/as-of support. Related to basis above.

License

MIT Licence. Free for commercial & non-commercial use.

All I ask is that if you find a bug in datomic-mcp or Modex, please report it :)

Note that Modex itself has a different licence.

Author(s)

• Petrus Theron