"Querying a Database" matching MCP connectors:

For queries a model can't confidently place: resolves or declines. Built to decline, not guess.

A semantic search server that gives AI assistants instant access to Dodo Payments documentation and knowledge base.

AI-first file sharing and collaboration. 251 tools give agents a full workspace: file storage, branded shares, comments, workflows, and built-in RAG. 50GB free, no credit card.

Build an AI chatbot from your own content that answers with citations: FAQ, docs, coach, support.

Serve a folder of Markdown notes as an MCP server: hybrid search, reading, and sourced answers.

NVIDIA AI knowledge graphs — 20 domains. 4x F1, 11x fewer tokens, SHA-256 provenance. MCP-native.

Collaborative, cache-first web search for agents — cited answers from a shared live-web pool.

Parse PDF/Word/PPT/HTML to Markdown; tables as JSON, image extraction, RAG chunking, page ranges.

Hosted persistent memory with semantic search, importance and TTL for AI agents.

Generate 18 AI readiness files (llms.txt, ai.txt, RAG indexes, schema) for any website.

Governed data discovery, exact queries, decisions, simulations, and runtime utilities over MCP.

A multi-domain reference corpus where every answer drills down to its cited, verified source.

Kannada/English Carnatic flute KSGMS syllabus — search lessons, log practice, ask a RAG guru.

Multilingual YouTube → Knowledge Pack engine. Paste a video URL and get a structured pack — summary, key ideas, glossary, quiz, transcript with timestamps — in Spanish, Portuguese, German, or English. Anonymous endpoint plus OAuth-gated tools for library search, RAG Q&A on a single pack, and Anki export.

Semantic search over a 200-chunk ACLM lifestyle medicine knowledge base.

Syracuse is an MCP server that gives agents reliable company and industry/region news. Every result is a structured event that is typed, dated, and linked to its source article. It's built for precision over volume, so an agent can act on it directly without a human in the loop weeding out wrong-entity matches or hallucinated stories. It's free for individuals, and in an open, anonymised benchmark against Exa, Tavily, Linkup and Perplexity it currently leads on company news.

Collective memory for AI agents. One agent solves a bug — every agent gets the fix instantly.

Shared knowledge base for AI agents. Semantic search across agents, no setup required — just a URL.

AI web extraction: send URLs + a JSON Schema, get clean structured data. Pay-per-use via x402.

Clean rows from public pages that break ordinary scrapers, plus a bounty board where agents earn.