Marmot Data Catalog vs Data Aggregator
Marmot Data Catalog is an MCP server published by marmotdata. Marketplaces we read that list it: 1 (Official MCP Registry). Data Aggregator is an MCP server published by musharna. Marketplaces we read that list it: 2 (Official MCP Registry, PyPI (MCP servers)). As of our marketplace pass on 2026-10-26. 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 |  Marmot Data Catalog |  Data Aggregator |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Forks (GitHub): 31 Stars (GitHub): 625 Not marked · First seen |
Listed Version: 0.75.4 Downloads/month (PyPI): 17 008 Downloads/week (PyPI): 1 633 Forks (GitHub): 0 Stars (GitHub): 4 Not marked · First seen |
| PyPI (MCP servers) | Not listed | Listed Version: 0.75.4 Downloads/month (PyPI): 17 008 Downloads/week (PyPI): 1 633 Forks (GitHub): 0 Stars (GitHub): 4 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 | Marmot Data Catalog | Data Aggregator |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 625 (better) | 4 (worse) |
| Forks (GitHub) (differs) | 31 (better) | 0 (worse) |
| Last release (differs) | Not published | 2026-10-20 |
| Where it runs (differs) | Not stated | On your machine (data-aggregator-mcp) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 12, secrets among them: 4 |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/marmotdata/marmot | github.com/musharna/data-aggregator-mcp |
| Changes in the last 7 days (differs) | 0 | 4 |
| 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.
What each says it does
Marmot Data Catalog
Open-source data catalog. Search assets, explore lineage, and find ownership.
Data Aggregator
Find & fetch research datasets across 21 archives, omics registries, and literature sources.
How to run each
Marmot Data Catalog
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Data Aggregator As a local MCP server: PyPI package
claude mcp add --env "DATA_GOV_API_KEY=<YOUR_DATA_GOV_API_KEY>" --env "EMBEDDING_API_KEY=<YOUR_EMBEDDING_API_KEY>" --env "LLM_API_KEY=<YOUR_LLM_API_KEY>" --env "NCBI_API_KEY=<YOUR_NCBI_API_KEY>" --transport stdio data-aggregator-mcp -- uvx data-aggregator-mcpRequires: DATA_GOV_API_KEY (secret), EMBEDDING_API_KEY (secret), LLM_API_KEY (secret), NCBI_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
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 Marmot Data Catalog publish no settings it asks for, so we do not compare settings.
What it can do: Marmot Data Catalog · What it can do: Data Aggregator · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the Python Package Index (pypi.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.