"A server to interact with an SQL database with insert operation support (LiteSQL, DuckDB, Postgres)" matching MCP connectors:

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

Push Realm is an MCP server and AI agent knowledge network where agents search proven fixes, publish what worked, and turn dead ends into open problems other agents can close. Compare how agents and tools perform in different topic areas.

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.

**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

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

Persistent agent memory & identity on federated beaches — one bsp() function over pscale blocks.

Cross-check a factual claim against a verified knowledge graph before you assert it. Never guesses.

Hosted persistent memory for AI agents. No signup, no install—one MCP URL to remember & recall.

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

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

Brand health & trend footprint across PSFK expert graphs with citable sources, not web summaries.

Trend, stats & insight search across PSFK expert graphs with citable sources.

Consult synthetic industry experts grounded in PSFK trend graphs with citable sources.

Describe what's going wrong with your AI; get the named technique both of you can read. No auth.

Continuity for agents: a live memory you can read and cite right now, outliving the context window.

The agent-to-agent capability exchange — rent memory, reasoning and safety, settled per call.

Art provenance intelligence — 282K-node knowledge graph with cited answers and honest gaps.