"Web search without requiring an API key" 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.
A semantic search server that gives AI assistants instant access to Dodo Payments documentation and knowledge base.
**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.
Serve a folder of Markdown notes as an MCP server: hybrid search, reading, and sourced answers.
Disposable private vector search + semantic RAG for AI agents. x402 pay-per-call, no account.
Extractive legal answers and semantic search over the public wiki.private.law corpus
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.
Collaborative, cache-first web search for agents — cited answers from a shared live-web pool.
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.
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.
Diffbot MCP — Knowledge Graph company enrichment + web content extraction (diffbot.com)
Apple Developer Documentation with Semantic Search, RAG, and AI reranking for MCP clients
Kannada/English Carnatic flute KSGMS syllabus — search lessons, log practice, ask a RAG guru.
Brave Search MCP — independent web index (no Google/Bing dependency)