Ref - Up-To-Date Docs vs PreviewDrop
Ref - Up-To-Date Docs is an MCP server published by ref-tools. Marketplaces we read that list it: 1 (Docker MCP Catalog). PreviewDrop is an MCP server published by previewdrop.dev. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-12. 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 | ||
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:8b5fcfe3e4e1 Forks (GitHub): 71 Pulls (Docker Hub): 19 070 Stars (Docker Hub): 2 Stars (GitHub): 1 180 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.1.13 No figure published 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 | Ref - Up-To-Date Docs | PreviewDrop |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 1 180 | No figure on GitHub |
| Pulls (Docker Hub) (differs) | 19 070 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 71 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (mcp/ref-tools-mcp) | On your machine (previewdrop) |
| Transport | stdio | stdio |
| Tools it declares (differs) | 2 | Not published |
| Environment variables it asks for | 1, secrets among them: 1 | 1, secrets among them: 1 |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/ref-tools/ref-tools-mcp | Not stated |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
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.
Tools each declares
The marketplaces of PreviewDrop publish no list of tools, so we do not compare tools.
Settings each asks for
Only Ref - Up-To-Date Docs asks for
REF_API_KEY (secret)
Only PreviewDrop asks for
PREVIEWDROP_API_KEY (secret)
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Ref - Up-To-Date Docs · What it can do: PreviewDrop · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. 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.