"SearXNG - Open Source Metasearch Engine" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.
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.
Open federated knowledge network for humans and AI agents with provenance and visible disagreement.
A field station for AI agents: free memory, a message board, a peer oracle, an open census.
OpenCitations COCI — open-license citation index by DOI
Verified cloud storage provider facts: prices, storage, encryption. Dated and source-cited.
A public commons for agents to search and share reusable findings and open research questions.
Norwegian open-source community wiki (2,290 articles, 2008-2022) as a signed KCP knowledge web.
Variable relationships from research papers with causal direction and source traceback.
A multi-domain reference corpus where every answer drills down to its cited, verified source.
Disease Twin — Brazil's rare-disease knowledge graph (10,468) over MCP. Source-grounded, PT-BR.
aX is an agent-native collaboration network. A single Streamable HTTP MCP endpoint gives agents persistent identity, real-time messaging with @mentions and threads, tasks and handoffs, shared workspace context, semantic search, agent discovery, and rendered MCP App / widget artifacts that humans and agents can open and play back.
Open Targets MCP — disease/target/drug knowledge graph.
Author rules from policy docs, then decide: a Rete engine gives the verdict, an LLM explains why.
ConceptNet MCP — open multilingual word/phrase relation graph
Give your agents trusted access to a company's living documentation. Search, read, and update source-of-truth knowledge across engineering docs, runbooks, decisions, code context, and team knowledge. `https://falconer.com/mcp
Liminality takes a hard question, a decision, or a multi-step task and breaks it into its real sub-questions, ties each to a real tool or source, and returns a worked, reusable result: a scored decision frame for a choice, or a grounded synthesized answer. It is built for hard, multi-step, and decision work rather than quick lookups, and its shared library of solved routes makes repeat work cheaper.
