OpenCrab

OpenCrab is an ontology-centered knowledge platform built for the AI agent era. It helps experts, researchers, and AI builders turn scattered documents, notes, workflows, and domain expertise into structured 'ontology packs' — reusable knowledge assets backed by verifiable evidence.

Instead of letting valuable knowledge sit in fragmented files, OpenCrab organizes it into high-quality knowledge graphs that stay traceable to their sources. This means the information your AI relies on is structured, credible, and ready for real workflows.

These ontology packs can be searched, shared, and queried by AI agents through Graph RAG and the Model Context Protocol (MCP). By grounding AI workflows in reliable, evidence-backed knowledge graphs, OpenCrab makes every answer more accurate and every automation more trustworthy.