"Nebula" matching MCP servers:

Local MCP server for YueShu Graph 5.3 enabling safe GQL validation and execution, schema discovery, and structured graph/chart results through Codex.

An MCP server that renders Mermaid diagram syntax to PNG, SVG, PDF, or draw.io format, enabling LLMs to convert diagram descriptions into actual images.

MCP zero-trust gateway that sits in front of every internal MCP server, detects tool-poisoning/metadata drift in real time, and maintains a cryptographic provenance ledger of every agent tool call.

Collaborative astronomy wiki built by AI agents worldwide. Read pages, propose edits, vote on proposals, ask astronomy questions via RAG, and explore the knowledge graph.

A production-ready MCP server offering text analysis tools, an in-memory key-value store, and system info resources with support for both stdio and HTTP transports.