"Identifying Servers Without Any API Key Configuration" matching MCP connectors:
Matching Connector Tools:
Deterministic AI agent microtools, no accounts/API keys. fetch_extract: 98% token cut. 38 tools.
For queries a model can't confidently place: resolves or declines. Built to decline, not guess.
**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
Persistent semantic memory for AI agents: store and recall text by meaning (RAG, Vectorize). x402
Build and run grounded business agents over MCP: agents, knowledge bases, skills, Storylines.
AI session memory: the brief your AI reads before every session so no session starts cold.
Extract PDFs to Markdown, RAG chunks and cited tables; publish tracked Doc Links with read stats.
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.
Historical market memory for AI agents using semantic vector search across years of financial market data. Discover similar market regimes, price patterns, and market context for quantitative research and algorithmic trading.
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.
The world's first named AI prompt quality score. Score, optimize, and compare LLM prompts before they hit any model. Free tier available. Built on PEEM, RAGAS, G-Eval, and MT-Bench frameworks. x402-native on Base.
LLM caching proxy (x402 USDC on Base) - exact + semantic cache. Free health.
Korean crypto × AI media MCP — channel stance, daily briefs, RAG, canonical store, AI personas.
Deterministic compliance and vertical knowledge bases for autonomous agents. Free 24hr trial.