fabio-rovai/open-ontologies

Overview

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

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

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.

126 stars on GitHub. Last updated 2026-05-29. Licensed MIT.

Use cases

• Embedding ontology reasoning into Rust applications
• Validating RDF data against SHACL shapes
• Running SPARQL queries on in-memory ontologies

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

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.