"DuckDB" matching MCP servers:

• MCP DuckDB Knowledge Graph

  IzumiSy

  A

  license

  B

  quality

  C

  maintenance

  A memory server for Claude that stores and retrieves knowledge graph data in DuckDB, enhancing performance and query capabilities for conversations with persistent user information.

  Updated 4 months ago (2026-04-07 03:25 UTC)

  8

  7

  57

  MIT

• Claude Memory MCP

  navid-kianfar

  A

  license

  A

  quality

  C

  maintenance

  Persistent, searchable per-project memory for Claude Code using DuckDB and vector search, with rule enforcement and a management UI.

  Updated a month ago (2026-07-01 20:25 UTC)

  37

  MIT

• Open Research KB

  vecbase-labs

  A

  license

  -

  quality

  B

  maintenance

  A local-first MCP server for building and querying PDF knowledge bases. It indexes PDFs into DuckDB and exposes evidence-grounded retrieval tools to separate corpus-backed answers from independent reasoning.

  Updated a month ago (2026-07-08 09:52 UTC)

  7

  2

  MIT

• brain-mcp

  yonidavidson

  A

  license

  -

  quality

  D

  maintenance

  Provides intelligent conversation memory storage using DuckDB, with support for multiple storage backends and automatic memory consolidation.

  Updated 9 months ago (2025-11-04 20:47 UTC)

  20

  AGPL 3.0

• Engram

  hugfeature

  A

  license

  -

  quality

  A

  maintenance

  Persistent memory for AI agents with Ebbinghaus forgetting curve, semantic graph retrieval, and engineering state tracking. Local-first, DuckDB, zero cloud dependency.

  Updated 2 months ago (2026-06-16 08:53 UTC)

  1

  MIT

• Memory MCP - Redis Stack

  BakeMark

  F

  license

  -

  quality

  D

  maintenance

  A drop-in replacement for mcp-memory-duckdb with full concurrent access support using Redis Stack. Enables persistent knowledge graph storage with full-text search and multi-session concurrent access.

  Updated 6 months ago (2026-02-02 23:55 UTC)

• mcp-memory-graphdb

  pavex

  F

  license

  -

  quality

  C

  maintenance

  A persistent graph-database memory server for Claude and other LLM agents, built on the Model Context Protocol and powered by DuckDB.

  Updated 2 months ago (2026-06-20 07:43 UTC)

• agentcairn

  ccf

  A

  license

  B

  quality

  A

  maintenance

  agentcairn is a local-first memory MCP server: your agent's memories live as Markdown in an Obsidian vault you own — the source of truth — with a rebuildable DuckDB index providing fast hybrid BM25 + vector + graph recall. It exposes tools to capture, recall, and manage those memories (non-lossy, with secret redaction) and works the same across Claude Code, Codex, Cursor, and any MCP host.

  Updated 5 days ago (2026-08-06 21:58 UTC)

  5

  32

  Apache 2.0