RCSB PDB vs STRING Database MCP Server
RCSB PDB is an MCP server published by rcsb. Marketplaces we read that list it: 1 (Official MCP Registry). STRING Database MCP Server is an MCP server published by string-db.org. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-18. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  RCSB PDB |  STRING Database MCP Server |
|---|---|---|
| Official MCP Registry | Listed Version: 0.22.0 Downloads/month (PyPI): 676 Downloads/week (PyPI): 546 Forks (GitHub): 4 Stars (GitHub): 9 Not marked · First seen |
Listed Version: 1.0.0 Forks (GitHub): 5 Stars (GitHub): 7 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | RCSB PDB | STRING Database MCP Server |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 9 (better) | 7 (worse) |
| Forks (GitHub) (differs) | 4 (worse) | 5 (better) |
| Last release (differs) | 2026-10-12 | Not published |
| Where it runs (differs) | On your machine (rcsb-mcp) | Remote server (mcp.string-db.org) |
| Transport (differs) | stdio | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/rcsb/rcsb-mcp | github.com/meringlab/string-mcp |
| Changes in the last 7 days (differs) | 1 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 37 h ago |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
RCSB PDB
MCP server to search, inspect, and cross-reference RCSB Protein Data Bank structures
STRING Database MCP Server
Query STRING interactions, enrichment, annotations, homology, and PPI networks.
How to run each
RCSB PDB As a local MCP server: PyPI package
claude mcp add --transport stdio rcsb-mcp -- uvx rcsb-mcpSTRING Database MCP Server As a remote MCP server
claude mcp add --transport http string-mcp https://mcp.string-db.org/Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only STRING Database MCP Server has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: RCSB PDB · What it can do: STRING Database MCP Server · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.