io.github.mrfentmen/chempirical-mcp
chempirical-mcp
Is the io.github.mrfentmen/chempirical-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-09.
MCP server for Chempirical: search 48,000 com MCP: real tools for real work.
alive probed 2026-11-15 · unchanged since 2026-11-09
- Run it
- npx -y chempirical-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- chempirical-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.3 % of a 1M context window
- Count
- 2.7k tokens in Claude Opus 5.5, exact, measured 2026-11-09. With the Claude Code prefix mcp__…__ on each tool name: 2.9k. The o200k_base estimate is 1.5k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/awesome-servers
- Registry
- active, updated 2026-11-08 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.85×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| scale_reaction | 294 | 159 | 11 % |
| list_reactions | 279 | 151 | 10 % |
| search_molecules | 255 | 138 | 9 % |
| substructure_search | 236 | 128 | 9 % |
| similarity_search | 210 | 114 | 8 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.mrfentmen/checkly-mcp · alive
- io.github.mrfentmen/checkout-com-mcp · alive
- io.github.mrfentmen/checksum-mcp · alive
- io.github.mrfentmen/chembl-mcp · alive
- io.github.mrfentmen/chess-com-mcp · alive
- io.github.mrfentmen/chess-mcp · alive
- io.github.mrfentmen/chesscom-mcp · alive
- io.github.mrfentmen/chicago-mcp · alive
Servers that mention search or real.
- Propick Integration MCP ae.propick/propick · needs auth
- Projectory ae.projectory/mcp · alive
- Adrio ai.adrio/adrio · needs auth
- 1325.AI ai.1325/mcp · needs auth
- Agentic News ai.agentic-news/mcp · needs auth
- Dubai Data — Dubai real estate statistics ae.datadubai/dubai-real-estate · alive
- AI-Advisors ai.ai-advisors/mcp · needs auth
- Agentic Terminal Directory ai.agenticterminal/directory · alive
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 server answers initialize and tools/list. Nothing to fix.