io.github.mrfentmen/rxnav-mcp vs RxNorm MCP by usefulapi
io.github.mrfentmen/rxnav-mcp is an MCP server published by mrfentmen. Marketplaces we read that list it: 1 (Official MCP Registry). RxNorm MCP by usefulapi is an MCP server published by usefulapi.io. Marketplaces we read that list it: 1 (Official MCP Registry). 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 |   RxNorm MCP by usefulapi | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Downloads/month (npm): 609 Downloads/week (npm): 40 Not marked · First seen |
Listed Version: 1.24.0 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 | io.github.mrfentmen/rxnav-mcp | RxNorm MCP by usefulapi |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | No figure on GitHub | 0 |
| Forks (GitHub) (differs) | No figure on GitHub | 0 |
| Last release (differs) | Not published | 2026-10-25 |
| Where it runs (differs) | On your machine (rxnav-mcp) | Remote server (rxnorm.usefulapi.io/mcp) |
| 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/mrfentmen/rxnav-mcp | github.com/m190/usefulapi-mcp |
| Changes in the last 7 days (differs) | 0 | 10 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 5 days ago, requires a key |
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/rxnav-mcp
Drug names, identifiers, and properties from NIH RxNav. No key required.
RxNorm MCP by usefulapi
Look up drug names, RxCUIs, ingredients and interactions in RxNorm.
How to run each
io.github.mrfentmen/rxnav-mcp As a local MCP server: npm package
claude mcp add --transport stdio rxnav-mcp -- npx -y rxnav-mcpRxNorm MCP by usefulapi As a remote MCP server
claude mcp add --transport http rxnorm https://rxnorm.usefulapi.io/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only RxNorm MCP by usefulapi 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: io.github.mrfentmen/rxnav-mcp · What it can do: RxNorm MCP by usefulapi · 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.