Persistent memory MCP server. 25 tools, BM25+MMR+OOD retrieval, CFR-21 audit, knowledge graph.
Persistent memory MCP server. 25 tools, BM25+MMR+OOD retrieval, CFR-21 audit, knowledge graph.
Written in Rust. Backed by PostgreSQL + pgvector. 28 MCP tools (29 with CUBA_DOCS=1), 19 CLI commands, and every number below measured on a benchmark that — as of v0.12 — actually measures what it claims to. (The previous one did not. See Measured.)
The server publishes 1 tool. What each one is for:
Retrieval — Hybrid RRF fusion (k=60, Cormack 2009) over three signals — full-text, BM25 (ts_rank_cd), and pgvector HNSW — with entropy-routed weighting thatCompare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.
{
"mcpServers": {
"cuba-memorys": {
"command": "npx",
"args": ["-y", "cuba-memorys"],
"env": {
"DATABASE_URL": "your-value",
"CUBA_HTTP_TOKEN": "your-value",
"ORT_DYLIB_PATH": "your-value",
"CUBA_RERANKER_PATH": "your-value",
"ONNX_MODEL_PATH": "your-value",
"CUBA_NLI_PATH": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| DATABASE_URL | Endpoint or connection string the server talks to. | Yes |
| CUBA_HTTP_TOKEN | Credential the server authenticates with. | Yes |
| ORT_DYLIB_PATH | Filesystem location the server is allowed to use. | Optional |
| CUBA_RERANKER_PATH | Filesystem location the server is allowed to use. | Optional |
| ONNX_MODEL_PATH | Filesystem location the server is allowed to use. | Optional |
| CUBA_NLI_PATH | Filesystem location the server is allowed to use. | Optional |
Store entities, relations and observations in a local knowledge graph with the reference Memory MCP server.
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