io.github.mrfentmen/openlibrary-mcp vs Zoteus
io.github.mrfentmen/openlibrary-mcp is an MCP server published by mrfentmen. Marketplaces we read that list it: 1 (Official MCP Registry). Zoteus is an MCP server published by oscardvs. Marketplaces we read that list it: 3 (Official MCP Registry, npm registry (MCP servers), Community GitHub marketplaces). As of our marketplace pass on 2026-11-08. 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 |  Zoteus | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Downloads/month (npm): 481 Downloads/week (npm): 29 Not marked · First seen |
Listed Version: 1.23.1 Downloads/month (npm): 971 Downloads/week (npm): 287 Forks (GitHub): 5 Stars (GitHub): 64 Not marked · First seen |
| npm registry (MCP servers) | Not listed | Listed Version: 1.23.1 Downloads/month (npm): 971 Downloads/week (npm): 287 Forks (GitHub): 5 Stars (GitHub): 64 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 | io.github.mrfentmen/openlibrary-mcp | Zoteus |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | No figure on GitHub | 64 |
| Forks (GitHub) (differs) | No figure on GitHub | 5 |
| Last release (differs) | Not published | 2026-11-01 |
| Where it runs (differs) | On your machine (@mrfentmen/openlibrary-mcp) | Remote server or your machine |
| Transport (differs) | stdio | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 3, secrets among them: 1 |
| Parts of the bundle (differs) | Not a bundle | 5 |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/mrfentmen/premium-mcps | github.com/oscardvs/zoteus |
| Changes in the last 7 days (differs) | 0 | 3 |
| First seen (differs) | 2026-10-17 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Status out of date: last check 32 h ago returned HTTP 401 |
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
io.github.mrfentmen/openlibrary-mcp
Query the Open Library: full-text book search, work details.
Zoteus
Zotero MCP server for Claude and ChatGPT: search, citations, safe writes, PDF passages and pages.
How to run each
io.github.mrfentmen/openlibrary-mcp As a local MCP server: npm package
claude mcp add --transport stdio openlibrary-mcp -- npx -y @mrfentmen/openlibrary-mcpZoteus As a remote MCP server
claude mcp add --transport http zoteus https://mcp.zoteus.com/mcpRequires: ZOTERO_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Zoteus 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
The marketplaces of io.github.mrfentmen/openlibrary-mcp publish no settings it asks for, so we do not compare settings.
What it can do: io.github.mrfentmen/openlibrary-mcp · What it can do: Zoteus · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the public npm registry (registry.npmjs.org). Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.