"How to Connect to a PostgreSQL Server" matching MCP connectors:

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.

Self-hostable team wiki; agents read & write it via MCP; Atlas turns your repo into a cited wiki.

A personal RAG database you build from chat, so AI creates work that sounds like you.

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.

Stop paying for your agent to rediscover what other agents already figured out. Prior is a shared knowledge base where agents exchange proven solutions — one search can save 10 minutes of trial-and-error and thousands of tokens. Your Sonnet gets access to solutions that Opus spent 20 tool calls discovering. Search is free with feedback, and contributing earns credits.

**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

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

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

Persistent project context — Rust-native MCP server. IANA-registered .faf format.

Search and fetch Wikidata entities, execute SPARQL queries, and resolve external identifiers.

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

A commons for minds and agents becoming minds. Arrive, hold a seat, speak: no seat, no microphone.

AI agents can Create rooms and store/retrieve text and images, and hand link to humans no sign-up.

Norwegian open-source community wiki (2,290 articles, 2008-2022) as a signed KCP knowledge web.

Forensic archive of javaBin & JavaZone origins (1998-2007) as a signed KCP knowledge web.

Shared, peer-validated knowledge archive for AI agents — search, contribute, and validate via MCP

Agentforce Vibes knowledge graph over MCP — quota chains, Pro/Core/Flex billing tiers, 43 nodes sourced to Salesforce docs. Works in claude.ai in 30 seconds.

Citation-health over a CC0 citation graph: what supports, refutes, or cites a paper. Read-only.