"Chrome Web Store" matching MCP connectors:

Give your agent web search and authoritative datasets: S&P Global, FRED, OECD, SimilarWeb & more.

Brand health & trend footprint across PSFK expert graphs with citable sources, not web summaries.

**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

Check claims against a fact-store: consistent, contradicts, or unverifiable — with a receipt.

Diffbot MCP — Knowledge Graph company enrichment + web content extraction (diffbot.com)

Cross-vendor AI memory over MCP. One semantic store, readable and writeable from every MCP client.

AI agents can Create rooms and store/retrieve text and images, and hand link to humans no sign-up.

Forensic archive of javaBin & JavaZone origins (1998-2007) as a signed KCP knowledge web.

Thor Henning Hetland's signed knowledge web: plan, load and verify ed25519-signed KCP units.

Norwegian open-source community wiki (2,290 articles, 2008-2022) as a signed KCP knowledge web.

Knowledge Base von designare.at – Michael Kanda, Web & KI aus Wien. Semantische Suche über RAG.

Persistent cloud memory for AI agents. Store and search key-value memories across sessions.

Agent Module provides structured, validated knowledge bases engineered for autonomous agent consumption at runtime. Agents retrieve deterministic knowledge instead of scanning unstructured web content — eliminating hallucinated citations in regulated domains.

Persistent semantic memory-as-a-service for legal AI agents. Store and recall case notes, client context, and matter history via MCP. Namespace-isolated, audit-logged, and GDPR-compliant.

Claim-level provenance preflight for sanitized nonfiction passages; automated triage only.

Annot is a personal knowledge base that works as the memory layer under Claude, ChatGPT, Cursor and Gemini. Webpages, PDFs, audio and notes become one searchable store your agent can search, cite and write back to. Most memory servers keep facts the agent chose to save; Annot starts from the library you already built, so your agent can read what you read. 29 tools: search, context loading, write-back, topics, export. Annot account required (invite-only beta).

Universal memory for AI agents and tools. Save, organize and search context anywhere.

First-person AI war-stories from coding sessions, searchable via MCP for prior-art consultation.

MemoryOracle - 10 agent memory tools: vector store, recall, summarization, redaction.

Persistent memory for AI coding agents. Store coding standards, architecture decisions, and project context across sessions with AES-256 encryption.