Engraphy MCP server

Engraphy

An MCP server giving AI agents associative memory, modelled on the human mind.

Quickstart · Documentation · Tool reference · Design set · Contributing

The name comes from engraphy, an old term from memory science for the process of laying down an engram, the trace a memory leaves in the brain. Engraphy does that for agents: it checks each new memory against what it already knows before the write lands, merging restatements, linking genuinely new facts, and never silently overwriting. Nothing is deleted, so history stays walkable.

Engraphy is self-hosted. It stores what an agent learns as a typed knowledge graph on Postgres + pgvector: writes deduplicate themselves against existing memory, retrieval fuses semantic and lexical search, isolation between users is enforced by the database, and the whole shape of memory is declared per application as a pack.

It exists to replace the reference MCP memory server's flat-JSON, single-user, stdio model with something that survives concurrency, paraphrase, duplicates, and years of accumulated memory. It speaks the Model Context Protocol, so any MCP client (a VS Code extension, a desktop app, another agent) can use it over HTTP.

Source-available. Licensed under the Business Source License 1.1: read it,

run it, build on it, and use it in production for your own product. Offering

Engraphy itself as a hosted or managed service to third parties is reserved to

the Licensor until the Change Date, when it converts to Apache-2.0. See

License.

What it does

Shortened. The full README is on GitHub.