Kairn MCP Server

Status: Alpha. The API and CLI are functional and tested (see Development), but interfaces may still change between releases. Feedback and issues welcome.

People who need memory tools inside Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-24 · ★ 13 · #211 OF 259 MAINTAINED MEMORY · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install Kairn

before you install - you'll need

Set KAIRN_CACHE_SIZE, KAIRN_JWT_SECRET before connecting. KAIRN_LOG_LEVEL, KAIRN_DB_PATH are optional or environment-specific per the README.

Claude Desktop

Settings → Extensions → Install, then select the https://github.com/primeline-ai/kairn/releases/download/v0.2.1/kairn-0.2.1.mcpb .mcpb bundle

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as Claude Desktop extension (.mcpb bundle)

license MIT - declared in the repository

registry namespace io.github.primeline-ai is GitHub-verified and matches the repo owner

03 · What Kairn can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.2.1 · 2026-07-07

PyPI rendering fixes: the README hero image and the benchmark scorecard's diagnosis links now use absolute GitHub URLs (PyPI cannot resolve relative paths), the status line no longer hardcodes a version, and…

v0.2.0 · 2026-07-07

First release since 0.1.0 (February). Highlights: · Fixed · Processes embedding Kairn now exit cleanly. The server closed no database connection on shutdown, so any process that ran a tool hung at interpreter exit on a…

04 · Who maintains Kairn

kairn is maintained by primeline-ai. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository
github.com/primeline-ai/kairn
category
memory - ranked #211 of 259 actively-maintained memory servers as of 2026-08-25.
release cadence
2 releases in the last 90 days (latest 2026-07-07)
registry
io.github.primeline-ai/kairn (active, first published 2026-08-24)
packages
mcpb:https://github.com/primeline-ai/kairn/releases/download/v0.2.1/kairn-0.2.1.mcpb

06 · Kairn FAQ

What is Kairn?

Status: Alpha. The API and CLI are functional and tested (see Development), but interfaces may still change between releases. Feedback and issues welcome.

Is Kairn still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-24 and it shipped 2 releases in the last 90 days. We re-verify nightly.

07 · Alternatives to Kairn

Alternatives to Kairn

Maintained memory servers if Kairn isn't the fit.

  1. Codebase Memory Codebase knowledge graph for AI agents - 159 languages, sub-ms queries, 99% fewer tokens. ★ 40,198 · 2026-08-23
  2. Tradememory Protocol MCP memory for AI trading agents. Store trades, recall similar setups, track strategy performance. ★ 1,412 · 2026-08-11
  3. Superlog Open-source agent that observes and fixes your application. Query logs, traces, metrics, incidents. ★ 1,394 · 2026-08-23
  4. Persome Local-first personal memory and model server for trusted MCP agents on macOS. ★ 1,314 · 2026-08-21
  5. Neo4j Memory MCP Neo4j Knowledge Graph Memory Server ★ 979 · 2026-04-10
  6. Projectmem Local-first memory + judgment layer for AI coding agents - warns before repeating failed fixes. ★ 750 · 2026-08-06

Pairs well with

Servers that cover what Kairn doesn't - only shown when the pairing reason fits the companion.

  1. Server Filesystem → filesystem companion filesystem · ★ 38,704
  2. X402 List MCP → filesystem companion filesystem · ★ 58

More memory MCP servers · Pseudolife Memory · Purmemo · State Memory MCP · Titen Memory · Memorykit

More Python MCP servers · Hunch (prithviseran) · AI R · KiCad Tools · Hmr · Prufa MCP · see all