Greenlit Books vs io.github.SuperAgentic/spines
Greenlit Books is an MCP server published by greenlitbooks.com. Marketplaces we read that list it: 1 (Official MCP Registry). io.github.SuperAgentic/spines is an MCP server published by SuperAgentic. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-30. 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 |  Greenlit Books |  io.github.SuperAgentic/spines |
|---|---|---|
| Official MCP Registry | Listed Version: 1.3.0 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 1.1.0 Downloads/month (npm): 112 Downloads/week (npm): 25 Forks (GitHub): 0 Stars (GitHub): 0 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 | Greenlit Books | io.github.SuperAgentic/spines |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) | 0 | 0 |
| Forks (GitHub) | 0 | 0 |
| Last release (differs) | Not published | 2026-10-14 |
| Where it runs (differs) | Remote server (greenlitbooks.com/api/mcp) | On your machine (@spines/mcp-server) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 1, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/greenlitbooks/mcp | github.com/getspines/mcp-server |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 2 days ago | no remote endpoint we check |
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
Greenlit Books
Search the Greenlit AI books, read any chapter one free, and look up the terms they define.
io.github.SuperAgentic/spines
Access book collections, reading lists, and bookshelf recognition from AI assistants.
How to run each
Greenlit Books As a remote MCP server
claude mcp add --transport http catalog https://greenlitbooks.com/api/mcpio.github.SuperAgentic/spines As a local MCP server: npm package
claude mcp add --env "SPINES_API_KEY=<YOUR_SPINES_API_KEY>" --transport stdio spines -- npx -y @spines/mcp-serverRequires: SPINES_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Greenlit Books 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 Greenlit Books publish no settings it asks for, so we do not compare settings.
What it can do: Greenlit Books · What it can do: io.github.SuperAgentic/spines · 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.