MCP Servers · Memory
fabio-rovai/open-ontologies
AI-native ontology engine: a Rust MCP server with tools for building, validating, querying, and reasoning over RDF/OWL ontologies.
Our verdict
We have not reviewed fabio-rovai/open-ontologies yet
No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.
From the listing
About fabio-rovai/open-ontologies
Open-ontologies is a Rust MCP server for building, validating, querying, and reasoning over RDF/OWL ontologies. It uses an in-memory Oxigraph triple store with a native OWL2-DL tableaux reasoner, SHACL validation, and SPARQL support. The single binary runs without a JVM.
Best for
Rust developers needing a fast, self-contained ontology engine for embedded or server-side use
Use cases
- Embedding ontology reasoning into Rust applications
- Validating RDF data against SHACL shapes
- Running SPARQL queries on in-memory ontologies
Notes
126 stars on GitHub. Last updated 2026-05-29. Licensed MIT.
Pros
- Lightweight single binary with no JVM dependency
- Native OWL2-DL reasoning and SHACL validation built-in
- Simple MCP server interface for integration
Cons
- In-memory store limits ontology size to available RAM
- No built-in persistence or distributed query capabilities
- Smaller community and fewer integrations than Java-based alternatives
Key facts
What we have checked
Not checked yet. Dated facts such as prices, releases and repository activity appear here once we have confirmed them from a source.
How to use
How to set it up
As the listing publishes it. We have not run this install.
Tools exposed
PROV-OOWL-TimeAgent-OMLogMap-BioDRAL-OA
Clients the listing names (not checked here)
Claude Desktop, Claude Code, Cursor, Windsurf, VS Code
Example client config
{
"mcpServers": {
"open-ontologies": {
"command": "/path/to/open-ontologies/target/release/open-ontologies",
"args": [
"serve"
]
}
}
}Install
Add fabio-rovai/open-ontologies to your client
No install recipe yet. We write one for Claude Code, Claude Desktop, Cursor, VS Code, Codex and ChatGPT when the server is in the official MCP registry with a package or remote address we can use.
Until then, follow the project's own README, or the setup the listing publishes under How to set it up.
Works with
What fabio-rovai/open-ontologies connects to
No confirmed connections yet. A product appears here when the server's registry name, repo, homepage or name ties it to that product, and a client appears when we have an install recipe for it.
Health and security
Is fabio-rovai/open-ontologies looked after, and what do its setup files show
Security check static checks
100 out of 100
- Note No published npm or PyPI package of this repository was found, so package advisories were not checked.
- Note The lab has not recorded this server's tool list yet, so tool permissions were not checked.
Sources
Where this comes from
No sources recorded yet. Each source we check is listed here with the date we checked it.
A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.
Changelog
What changed
No changes recorded yet. Releases, price changes and deprecations appear here, with their dates, once we track them for this record.
Pairs with
Other entries in the index that connect to this one. Click through to see the chain.
Get the free Developer’s Field Guide
A 27-page field guide to the AI coding workflow with Claude. Claude Code, MCP servers, the prompt patterns that work, and what to delegate. Free.
Enter your work email. We send it straight over, plus a few short notes worth knowing. Unsubscribe any time.