AgentIndex LogoAgentIndex.app
Tools
open-ontologies

open-ontologiesNEW

AI-native ontology engine: a Rust MCP server with tools for building, validating, querying, and reasoning over RDF/OWL ontologies. In-memory Oxigraph triple store, native OWL2-DL tableaux reasoner, SHACL validation, SPARQL, versioning. Single binary, no JVM.

💡Top Alternatives to open-ontologies

Why use AgentIndex?

AgentIndex is the definitive directory for AI Agents, MCP Servers, and developer tools. We curate high-quality, open-source resources to help developers build the next generation of AI applications. Whether you are looking for autonomous agents, RAG frameworks, or IDE rules for Cursor and Windsurf, AgentIndex provides a centralized, searchable database to accelerate your development workflow.

What are MCP Servers?

The Model Context Protocol (MCP) is an open standard that enables AI models to securely interact with external data and tools. MCP Servers act as bridges, allowing Large Language Models (LLMs) like Claude and Gemini to access local files, databases, and APIs without direct integration. AgentIndex lists hundreds of ready-to-use MCP servers to enhance your AI's capabilities and context awareness.

© 2026 AgentIndex.appBuilt by a 10-year iOS Developer.

Not affiliated with Anthropic, OpenAI or Microsoft.

AgentIndex is community-supported. When you buy through links on our site, we may earn an affiliate commission.