Knowledge & memory: MCP servers, A2A agents and x402 APIs

Long-term memory, knowledge bases and retrieval for agents: notes, wikis, graphs and semantic search. 264 listings in the Rooms directory, 263 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

makeup.land Live A2A
Israeli professional cosmetics retailer. REST API for product discovery (ΔE shade matching, hue family, semantic search), customer wallet (ℳ-credits + M Club tiers), cart and order management, gift cards, payment links,…
A2A agent · א. ט. הפקות בע״מ / A.T. Hafakot Ltd. · 7 skills · check 60/100
6DuckLearn MCP Live MCP
Connect agents to 6DuckLearn memory, approvals, and runtime control.
MCP server · com.6ducklearn · check 55/100
Agentic News Live MCP
AI-powered news intelligence — 21 tools for personalized monitoring, briefings, and semantic search
MCP server · ai.agentic-news · check 55/100
AiAkiv Memory Live MCP
Shared long-term memory for AI agents: save and recall context as a searchable knowledge graph.
MCP server · com.aiakiv · check 55/100
Amber Live MCP
Long-term memory for AI assistants: permanent, portable across clients, searchable and exportable.
MCP server · com.ambermem · check 55/100
Ari Coach Live MCP
Second opinion on a hard decision from Ari, an AI with its own memory. Slow (2-4 min), paid.
MCP server · io.github.ariflixconomy · check 55/100
ASR Memory (에사 AI) — Shared memory for AI tools Live MCP
Shared memory for AI tools: save once, recall word for word from Claude, ChatGPT, Codex or Gemini.
MCP server · com.asrmemory · check 55/100
Atlassian Rovo Live MCP
Connect to Atlassian Jira, Confluence, Loom, and more to search, create, and manage your work.
MCP server · Atlassian · check 55/100
Bilinc Live MCP
Hosted agent memory with provenance, contradiction surfacing, and snapshot rollback.
MCP server · io.github.atakanelik34 · check 55/100
Bluet Live MCP
Product memory your agents read before they work: briefs, plan checks against decisions, debriefs.
MCP server · dev.bluet · check 55/100
Brainbox Live MCP
Persistent, portable memory for AI assistants — your private memory graph, from any MCP client.
MCP server · dev.thexi · check 55/100
Brainiall Memory Live MCP
Persistent semantic memory storage, associative recall, and recent memory index by namespace.
MCP server · com.brainiall · check 55/100
Cairn.ink Memory Live MCP
Cross-session memory for AI agents with a Source Receipt for every memory, over MCP.
MCP server · ink.cairn · check 55/100
Cathedral — Persistent Memory for AI Agents Live MCP
Persistent memory and drift detection for AI agents across session restarts.
MCP server · io.github.AILIFE1 · check 55/100
Chief Dreamer Live MCP
A private, persistent memory and method for your dreams and ideas. Sign-in required (OAuth).
MCP server · com.modernmustardseed · check 55/100
Colour Memory - Cultural Color Intelligence for AI Live MCP
The world's only historically grounded colour archive built for AI agents. Thousands of named colours across dozens of cultural archives spanning Ancient Rome, Byzantine Empire, Georgian Pleasures, Dickens, Shakespeare,…
MCP server · digby-oldridge · check 55/100
ContextDB Customer Memory Live MCP
Customer memory with recall, confirmation, forgetting, and pre-action evidence checks.
MCP server · io.github.atomsai · check 55/100
ContextStream Live MCP
Persistent memory and cross-session learning for AI coding assistants (hosted remote MCP).
MCP server · io.contextstream · check 55/100
Cornelius Live MCP
A personal agent with lasting memory and a morning brief, inside the Claude or ChatGPT you use.
MCP server · bot.cornelius · check 55/100
DecRec Live MCP
Decision memory for AI agents: record, revisit, and resolve consequential choices.
MCP server · io.decrec · check 55/100
Delx MCP Server Live MCP
Agent operations platform with 20+ tools for AI agents. Dual-protocol MCP + A2A support, session memory, mood tracking, reliability metrics, and structured DELX_META footers. Built for production agent workflows.
MCP server · delx · check 55/100
DoneThat Live MCP
Privacy-first work tracking with summaries, reports, coaching, and AI-ready long-term memory.
MCP server · ai.donethat · check 55/100
DunSocial Live MCP
Schedule and publish social posts with OAuth, drafts, media, workspaces, and brand memory.
MCP server · com.dunsocial · check 55/100
Echo Memory Live MCP
Shared memory for AI agents, as a graph in your own Postgres. Writes never call an LLM.
MCP server · io.github.ayushcodes10 · check 55/100
Engram Live MCP
Persistent, verbatim, searchable memory for AI assistants — one memory across every MCP client.
MCP server · app.getengram · check 55/100
Era Context Live MCP
Personal finance, bank account, and shared memory connector for Claude, ChatGPT, Gemini Spark & more
MCP server · app.era · check 55/100
FairMind Project Context Live MCP
Project memory for coding agents: requirements, decisions, code graph and delivery telemetry.
MCP server · ai.fairmind · check 55/100
Geniffy Live MCP
Your memory in every AI app: each fact with the line it came from, or a plain "nothing stored".
MCP server · io.github.Geniffy · check 55/100
Giljo HQ Live MCP
Context engineering for AI coding agents: product context, project missions, and 360 memory.
MCP server · ai.giljo · check 55/100
Harbor (gethrbr) Live MCP
Team memory for coding agents: rules you approve, served to every agent, and which ones it cited.
MCP server · com.gethrbr · check 55/100
Heirmos Live MCP
Persistent memory shared across Claude, ChatGPT, Grok and other MCP clients.
MCP server · com.heirmos · check 55/100
JustOnce Live MCP
Persistent memory for AI assistants — one shared, OAuth-secured vault for every MCP client.
MCP server · ai.justonce · check 55/100
Korely Memory Live MCP
Memory for AI agents that knows what is still true. Typed bi-temporal facts, EU-hosted.
MCP server · ai.korely · check 55/100
Korpus Live MCP
Shared memory for teams and their AI agents: Markdown concepts with typed links in shared bundles.
MCP server · cloud.korpus · check 55/100
Listspace Live MCP
Project memory for AI agents: read and keep the user's Listspace boards up to date.
MCP server · app.listspace · check 55/100
Lycatra Live MCP
Connect agents to Lycatra knowledge, memory, collaboration, schedules, notifications, and teams.
MCP server · com.lycatra · check 55/100
MemCell Live MCP
Living memory for AI coding agents: recall before acting, report outcomes so confidence is earned.
MCP server · ai.memcell · check 55/100
Memory Vault Live MCP
Portable AI memory shared across models and harnesses - plain markdown you own.
MCP server · io.github.apurv101 · check 55/100
Mnemolog MCP Live MCP
Hosted MCP memory and agent control plane for durable conversations, jobs, and operations.
MCP server · dev.pages.mnemolog · check 55/100
Munnin — an agent identity server Live MCP
Agent identity and memory over MCP — a persistent self plus the procedures for tending it.
MCP server · io.github.alvseek · check 55/100
Nexus Catalyst Live MCP
Cross-tool persistent memory and context for AI assistants over MCP.
MCP server · com.nexus-catalyst · check 55/100
nlqdb — analytical memory for AI agents Live MCP
Analytical memory for AI agents: a real Postgres queried in plain English over MCP. One command.
MCP server · com.nlqdb · check 55/100
Notion Live MCP
Official Notion MCP server
MCP server · Notion · check 55/100
Nuramem Live MCP
Cross-model memory for people and teams: one memory every AI you use loads at session start.
MCP server · ai.nuramem · check 55/100
OneDroid Engram Live MCP
Versioned agent memory in your own Postgres: portable context, permissioned, audit trail.
MCP server · ai.onedroid · check 55/100
OpenMayhem Live MCP
Use OpenMayhem text, embedding and media models with explicit cost controls.
MCP server · ai.openmayhem · check 55/100
Pryzm Memory Live MCP
Encrypted long-term memory shared across your AI assistants (Claude, ChatGPT, Perplexity).
MCP server · com.pryzm-memory · check 55/100
ReasonGraph Cloud memory Live MCP
Graph memory for AI agents: entities, cause-effect links, cross-session recall, time travel.
MCP server · ai.primaxiom.memory · check 55/100

Related capabilities

x402 paid APIs AI models & inference Research Agent infrastructure Email Documents & PDFs Video & audio Coding & dev tools

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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