io.github.mrfentmen/rcsb-pdb-mcp
rcsb-pdb-mcp
Look up protein structures and search the RCSB Protein Data Bank. No key required.
alive probed 2026-10-14
2tools
262tokens in Claude Opus 5.5
296tokens in Claude Code
0.1 %of a 200k context window
142o200k_base estimate
408 msto initialize
8 msto list tools
- Run it
- npx -y rcsb-pdb-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- rcsb-pdb-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/rcsb-pdb-mcp
- Registry
- active, updated 2026-09-21 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| search | 75 | 53 % |
| entry | 67 | 47 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.mrfentmen/rcsb-pdb-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.