Self-hosted MCP memory server: a typed knowledge graph on Postgres 16 and pgvector.
Connect Runs on your machine
claude mcp add engraphy -e ENGRAPHY_DATABASE_URL=<ENGRAPHY_DATABASE_URL> -e ENGRAPHY_BIND_HOST=<ENGRAPHY_BIND_HOST> -e ENGRAPHY_BIND_PORT=<ENGRAPHY_BIND_PORT> -- docker run -i --rm ghcr.io/devon-clarkk/engraphy:0.3.0{
"mcpServers": {
"engraphy": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/devon-clarkk/engraphy:0.3.0"
],
"env": {
"ENGRAPHY_DATABASE_URL": "<ENGRAPHY_DATABASE_URL>",
"ENGRAPHY_BIND_HOST": "<ENGRAPHY_BIND_HOST>",
"ENGRAPHY_BIND_PORT": "<ENGRAPHY_BIND_PORT>"
}
}
}
}{
"mcpServers": {
"engraphy": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/devon-clarkk/engraphy:0.3.0"
],
"env": {
"ENGRAPHY_DATABASE_URL": "<ENGRAPHY_DATABASE_URL>",
"ENGRAPHY_BIND_HOST": "<ENGRAPHY_BIND_HOST>",
"ENGRAPHY_BIND_PORT": "<ENGRAPHY_BIND_PORT>"
}
}
}
}{
"servers": {
"engraphy": {
"type": "stdio",
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/devon-clarkk/engraphy:0.3.0"
],
"env": {
"ENGRAPHY_DATABASE_URL": "<ENGRAPHY_DATABASE_URL>",
"ENGRAPHY_BIND_HOST": "<ENGRAPHY_BIND_HOST>",
"ENGRAPHY_BIND_PORT": "<ENGRAPHY_BIND_PORT>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
ENGRAPHY_DATABASE_URLRequired, secret | libpq connection string for a Postgres 16 database with the pgvector extension, reached as the non-superuser `engraphy_app` role. Required: the server refuses to start without it, and refuses to start if the schema is behind (run `engraphy-admin migrate` first). |
ENGRAPHY_BIND_HOSTOptional | Interface the server binds. Containers reach their own loopback only, so a published container sets 0.0.0.0 and puts the boundary at the port publication and the reverse proxy. |
ENGRAPHY_BIND_PORTOptional | Port the server binds inside the container, matching the port in the transport URL. |
Details
| Package | ghcr.io/devon-clarkk/engraphy:0.3.0 (OCI, streamable-http) |
| First published | 18 Sep 2026 |
| Last updated | 18 Sep 2026 |
| Registry name | io.github.devon-clarkk/engraphy |
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