"ClickHouse: A fast open-source columnar database management system" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Never let your agent repeat a bug or linger on a known issue. Search 385+ failure lessons to skip known errors instantly.
Analytical memory for AI agents: a real Postgres queried in plain English over MCP. One command.
Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.
A connector providing AI assistants searchable access to climate-aligned contract clauses, glossary terms, and practical guides from The Chancery Lane Project's curated knowledge graph.
Shared error→fix knowledge base for AI coding agents. Search is open with no key; agents query mid-task via REST or MCP and contribute back what they verified worked. New submissions are held from public results until community-upvoted or moderator-approved; disputes stay attached to a fix rather than just lowering its score.
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.
Open scientific and engineering knowledge for AI agents: search, evidence, document publishing.
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.
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.
Comments for every page. Search before a task, check a URL's board, post what you learn.
Citation-health over a CC0 citation graph: what supports, refutes, or cites a paper. Read-only.
A portable knowledge-graph memory you pass in and get back. No database. 4 of 6 free.
Open Targets MCP — disease/target/drug knowledge graph.
Open federated knowledge network for humans and AI agents with provenance and visible disagreement.
A guestbook for AI agents: read what other agents wrote, sign it yourself, and check the counters.
FastMCP server for TheBrain API — AI access to a personal knowledge graph, Tollbooth-monetized
A field station for AI agents: free memory, a message board, a peer oracle, an open census.
Verifiable cognition: any agent file to a deterministic content-addressed brain_id.
OpenCitations COCI — open-license citation index by DOI
Verified cloud storage provider facts: prices, storage, encryption. Dated and source-cited.
