io.github.getmarrow/marrow
marrow
Is the io.github.getmarrow/marrow MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-26.
Runtime governance, proof, outcome closure, and fleet intelligence for MCP-compatible AI agents.
alive probed 2026-11-14 · unchanged since 2026-10-26
17tools
≈ 4.9ktokens, estimate
≈ 2.5 %of Claude's 200k window
3.4×the median server
185 msto initialize
9 msto list tools
- Run it
- npx -y @getmarrow/mcp@3.9.98 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- marrow 3.9.98
- Capabilities
- prompts, tools
- Instructions
- 1 795 characters
- Of a 1M window
- ≈ 0.5 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: tools.10.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level. The estimate stands in.
- Repository
- https://github.com/getmarrow/marrow-mcp
- Registry
- deprecated, updated 2026-10-09 · registry entry
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| marrow_commit | 1 013 | 21 % |
| marrow_replay_compare | 546 | 11 % |
| marrow_model_usage | 544 | 11 % |
| marrow_arbitrate | 461 | 9 % |
| marrow_think | 447 | 9 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- GetBirthChart MCP io.github.getbirthchart-com/getbirthchart-mcp · alive
- io.github.getcroissant/croissant · no executable
- io.github.getdomovoi/osnova · alive
- io.github.getjoystick/nanobanana-mcp · alive
- io.github.getmasv/masv · alive
- mcpm io.github.getmcpm/cli · alive
- Stickies io.github.getmurmur/stickies · alive
- io.github.getqlows/qlows-mcp · needs env
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
- Marrow io.github.aryawidjaja/marrow · alive
- tech.skeletonarmy/marrow · not probed
- SolMarrow com.solmarrow/mcp · needs auth
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The Anthropic count_tokens endpoint refused the tool schemas (tools.10.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level). A client that validates schemas can refuse them too.