"A tool for developing applications with Xcode" matching MCP connectors:

Open scientific and engineering knowledge for AI agents: search, evidence, document publishing.

User-owned memory for AI agents, Copilot, Claude, IDEs, CLIs, and chat apps over remote MCP.

Google Keep-style notes app with an MCP server for AI agents to read/write notes.

Shared long-term memory vault for AI agents with 20 MCP tools.

Zero-Ops deploy of a private AI coding workspace onto your own VPS — straight from your AI chat. Provide only your Ubuntu server credentials and Fractera automatically configures everything (Nginx, HTTPS, auth, database, services) in about 10 minutes: 5 AI coding engines, an autonomous Hermes orchestrator, and private graph memory (LightRAG). No terminal, no DevOps. IP-first and free; a custom domain with HTTPS is an optional later step.

Canonical vocabulary server for autonomous business design. Exposes the Arco Lexicon as seven MCP tools: term lookup, related terms, alignment verification, citation formatting, source retrieval, term listing, and term suggestion. No authentication required. Streamable HTTP transport.

Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.

Path-scoped team memories, rules and skills for Claude Code, Cursor, Codex and other MCP clients.

Check claims against a fact-store: consistent, contradicts, or unverifiable — with a receipt.

**ColdState Knowledge Search MCP Server** https://github.com/daniel-coldstate/coldstate-mcp Semantic search over 64.6M knowledge entries — the structured alternative to web search APIs and web scraping for LLM agents. No crawling, no rate limits, sub-3s responses. Cloud-hosted at services.coldstate.ai

Durable, versioned memory for AI assistants: save, checkpoint, and retrieve context by stable URL.

Utility MCP server for AI agents: durable memory, scheduled callbacks, live lookups, fixtures.

Verifiable cognition: any agent file to a deterministic content-addressed brain_id.

Create your digital twin: a public page that answers from your own material, with citations.

Persistent memory for AI agents. Semantic recall by meaning, not just keywords. No signup needed.

Genesis certificates, lineage, and cascading recalls: birth certificates + bloodlines for the agent

Persistent project context for Claude. IANA-registered .faf format.

Community-maintained knowledge base for Radix DLT — search, read, and contribute wiki pages.

GRIN-scored news for agents: discover by verdict, pull full analysis, traverse extraction graphs.

FastMCP server for TheBrain API — AI access to a personal knowledge graph, Tollbooth-monetized