io.github.aryawidjaja/marrow

Marrow

Is the Marrow MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

Shared memory for parallel AI coding agents. Local, free, with rooms and file claims.

alive probed 2026-11-14 · unchanged since 2026-10-30

8tools

2.6ktokens in Claude Opus 5.5

1.3 %of Claude's 200k window

1.1×the median server

13 msto initialize

3 msto list tools

Bundle: https://github.com/aryawidjaja/marrow/releases/download/v0.8.0/marrow-mcp.mcpb (MCPB, for a client that installs bundles; probed in a container with the network off)
Host: github.com
Reports itself as: marrow-mcp 0.8.0
Capabilities: prompts, tools
Instructions: none
Of a 1M window: 0.3 % of a 1M context window
Count: 2.6k tokens in Claude Opus 5.5, exact, measured 2026-10-30. With the Claude Code prefix mcp__…__ on each tool name: 2.7k. The o200k_base estimate is 1.5k. Counted again when the tool definitions change. Method.
Repository: https://github.com/aryawidjaja/marrow
Website: https://www.marrow.works
Registry: active, updated 2026-08-10 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.73×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
mem_write	1 050	607	40 %
mem_recall	515	298	19 %
mem_search	346	200	13 %
mem_supersede	284	164	11 %
mem_bootstrap	173	100	7 %

Other registry entries on github.com, the ones next to this name; all of them.

InfoSlides — put content on a TV or screen io.github.arnibj/infoslides · error
Albert Heijn io.github.arnouthoebreckx/albert-heijn-be-mcp · alive
YC GraphQL MCP · Distributed Systems io.github.arthurcolle/yc-graphql-mcp · crashed on start
sysmcp io.github.arunmm8335/sysmcp · alive
rpt-mcp (SAP Crystal Reports) io.github.ashafizullah/rpt-mcp · error
Web2MD MCP Server io.github.astra-intelligence/web2md-mcp · install failed
Oh My Android io.github.ateymoori/oh-my-android · crashed on start
io.github.atushi1841/japan-anime-figure-mcp · crashed on start

Servers that mention marrow.

Marrow id.marrow/marrow · server error
Marrow AI: Control Layer for AI Agents ai.getmarrow/marrow · alive
io.github.qianqiuwanzi/hypermarrow-mcp · alive
HyperMarrow cool.qianshi/hypermarrow · alive
Marrow Health: Apple Health for your AI com.marrowhealthapp/apple-health · needs auth
io.github.getmarrow/marrow · alive
tech.skeletonarmy/marrow · not probed
SolMarrow com.solmarrow/mcp · needs auth

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.