Memory Arbiter MCP

Memory Arbiter is a trustworthy local fact layer for AI agents - not just shared memory, but shared facts that are current, trusted, traceable, and safe to use. It is a local SQLite service exposed over MCP: four product tools, evidence-based recall, advisory conflict notices, and user-authorized governance. Every fact is stored once in local SQLite and every model it can call runs locally.

People who work with ai memory, codex and context engine and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-29 · ★ 9 · #28 OF 321 MAINTAINED MEMORY · VERIFIED 2026-09-30

Apache-2.0 · Python servers · how we verify → /methodology

01 · Install Memory Arbiter MCP

before you install - you'll need

NO_PROXY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add billy12151-memory-arbiter-mcp -- uvx memory-arbiter-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "billy12151-memory-arbiter-mcp": {
      "command": "uvx",
      "args": [
        "memory-arbiter-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

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 local process (stdio) - runs on your machine with your user's permissions

license Apache-2.0 - declared in the repository

pypi package memory-arbiter-mcp - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.billy12151 is GitHub-verified and matches the repo owner

03 · What Memory Arbiter MCP can do

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

Latest releases

v0.16.12 · 2026-09-22

性能 Part 1（写入/查询链路提速，行为不变） · 21 项任务全落地，两轮 review（第二轮对抗性）累计 12 项修复。全量 harness 两轮对 0.16.11 基线回归门 PASSED，召回/冲突/相似提示行为指标逐位一致。 · | 指标 | 0.16.11 | 0.16.12 | 提升 | · |---|---|---|---| · | 写入 p50（harness 298 条库） | 463.8ms |…

v0.16.11 · 2026-09-19

0.16.11（2026-09-20） · 相关性下限 8.1 → 8.25（owner 拍板，评测先行）。细扫分离窗 (8.218, 8.278]：5 条弱档误捞（纯向量擦边候选）全挤在 8.212–8.218，最近的 paraphrase 真召回在 8.278 - - 窗口内零召回损失砍掉 5/7 法律类误捞（7/21 → 2/8，Recall@10 保持 43/45）。窗宽 ~0.06 属语料特性：换 embedder…

v0.16.10 · 2026-09-19

0.16.10（2026-09-19） · workspace 归一前置门禁 - - 判定队列里 kind='workspace' 的 pending 行清零才能 kick，否则返回 workspace_backlog_pending（零副作用）；scheduled_tasks 规格 v4→v5。先归一再扫冲突：冲突配对只在同 workspace 内进行，桶归属未治理完时扫描基数是错的。 · find…

04 · Who maintains Memory Arbiter MCP

memory-arbiter-mcp is maintained by billy12151. It's the only MCP server we track from this author; the repo dates to Jul 2026.

05 · Facts

repository: github.com/billy12151/memory-arbiter-mcp
category: memory - ranked #28 of 321 actively-maintained memory servers as of 2026-09-30.
release cadence: 10+ releases in the last 90 days (latest 2026-09-22)
registry: io.github.billy12151/memory-arbiter-mcp (active, first published 2026-07-04 · 11 versions)
packages: pypi:memory-arbiter-mcp

06 · Memory Arbiter MCP FAQ

What is Memory Arbiter MCP?

Is Memory Arbiter MCP still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-29 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Memory Arbiter MCP?

Run `uvx memory-arbiter-mcp`. The README documents one environment variable (NO_PROXY) to set first. You can also paste the ready-made client config above.

Does Memory Arbiter MCP run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Memory Arbiter MCP

Alternatives to Memory Arbiter MCP

Maintained memory servers if Memory Arbiter MCP isn't the fit.

Pairs well with

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

More memory MCP servers · Open Brain · Memwright · Attestor · hmem - Humanlike Memory for AI Agents · Excalidraw Architect

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