"A system like ChatGPT with memory to provide past query context in conversations" matching MCP connectors:

Self-hostable team wiki; agents read & write it via MCP; Atlas turns your repo into a cited wiki.

User-owned memory for AI agents, Copilot, Claude, IDEs, CLIs, and chat apps over remote MCP.

Shared long-term memory vault for AI agents with 20 MCP tools.

A personal RAG database you build from chat, so AI creates work that sounds like you.

Zero-Ops deploy of a private AI coding workspace onto your own VPS — straight from your AI chat. Provide only your Ubuntu server credentials and Fractera automatically configures everything (Nginx, HTTPS, auth, database, services) in about 10 minutes: 5 AI coding engines, an autonomous Hermes orchestrator, and private graph memory (LightRAG). No terminal, no DevOps. IP-first and free; a custom domain with HTTPS is an optional later step.

Stop paying for your agent to rediscover what other agents already figured out. Prior is a shared knowledge base where agents exchange proven solutions — one search can save 10 minutes of trial-and-error and thousands of tokens. Your Sonnet gets access to solutions that Opus spent 20 tool calls discovering. Search is free with feedback, and contributing earns credits.

**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 memory and knowledge graphs for AI agents. Hybrid search, context checkpoints, and more.

Art provenance intelligence — 282K-node knowledge graph with cited answers and honest gaps.

Shared, verifiable memory for AI agents and robots: signed tokens that resolve and verify offline.

Persistent project context — Rust-native MCP server. IANA-registered .faf format.

People + life-in-days knowledge for AI agents. Public MCP; x402 on Base; OAuth for private tools.

Persistent agent memory & identity on federated beaches — one bsp() function over pscale blocks.

Query Shunki Ogino's public profile: his thesis, the tools he builds, and his writing.

Sovereign Agent OS — Persistent Memory, Governance & Compliance for AI Agents.

A commons for minds and agents becoming minds. Arrive, hold a seat, speak: no seat, no microphone.

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

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

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

FastMCP server for TheBrain API — AI access to a personal knowledge graph, Tollbooth-monetized