io.github.SemanticDataCharter/sdcvalidator vs io.github.mrfentmen/schema-sieve-mcp
io.github.SemanticDataCharter/sdcvalidator is an MCP server published by SemanticDataCharter. Marketplaces we read that list it: 1 (Official MCP Registry). io.github.mrfentmen/schema-sieve-mcp is an MCP server published by mrfentmen. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-22. 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 |  io.github.SemanticDataCharter/sdcvalidator | |
|---|---|---|
| Official MCP Registry | Listed Version: 4.5.3 Downloads/month (PyPI): 950 Downloads/week (PyPI): 209 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
Listed Version: 1.0.0 Downloads/month (npm): 749 Downloads/week (npm): 47 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.SemanticDataCharter/sdcvalidator | io.github.mrfentmen/schema-sieve-mcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 1 | No figure on GitHub |
| Forks (GitHub) (differs) | 0 | No figure on GitHub |
| Last release (differs) | 2026-10-18 | Not published |
| Where it runs (differs) | On your machine (sdcvalidator) | On your machine (schema-sieve-mcp) |
| Transport | stdio | stdio |
| 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/semanticdatacharter/sdcvalidator | github.com/mrfentmen/schema-sieve-mcp |
| Changes in the last 7 days (differs) | 2 | 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.
What each says it does
io.github.SemanticDataCharter/sdcvalidator
SDC4 structural validator with ExceptionalValue recovery; thin wrapper over xmlschema.
io.github.mrfentmen/schema-sieve-mcp
Local JSON Schema structure inspection and privacy-safe fixture planning. Tools include inspect...
How to run each
io.github.SemanticDataCharter/sdcvalidator As a local MCP server: PyPI package
claude mcp add --transport stdio sdcvalidator -- uvx sdcvalidator mcpio.github.mrfentmen/schema-sieve-mcp As a local MCP server: npm package
claude mcp add --transport stdio schema-sieve-mcp -- npx -y schema-sieve-mcpCommands 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
Neither one's marketplaces publish the settings it asks for.
What it can do: io.github.SemanticDataCharter/sdcvalidator · What it can do: io.github.mrfentmen/schema-sieve-mcp · 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.