Datomic MCP Server
About
Datomic MCP Server so your AI model can query your database (uses Modex MCP library)
Details
- Author
- theronic
- GitHub stars
- 26
- Downloads
- 182
- Categories
- Other
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- Supports concurrent queries with async message handling
- Exposes datomic.api/q as an MCP tool
- Exposes datomic.api/datoms as an MCP tool
- Provides datomic.api/with via the q-with tool
- Exposes datomic.api/pull and pull-many tools
- Supports entity, touch, and entid operations
Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
Datomic MCP ServerCommand (node, npx, python, etc.)Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
Run the provided Java uberjar and configure the DATOMIC_URI environment variable in your MCP client settings (e.g., Claude Desktop). The server currently supports query, datoms, with, pull, pull-many, entity, touch, and entid operations through MCP tools.
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"datomic mcp server": {
"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>"
}
}
}
}
}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>"
}
}
}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
- [x] Concurrent queries (async message handling since Modex 0.3.0)
- [x] datomic.api/q
- [x] datomic.api/datoms
- [x] datomic.api/with (via q-with tool)
- [x] datomic.api/pull
- [x] datomic.api/pull-many
- [x] datomic.api/entity
- [x] datomic.api/touch
- [x] 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)
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