Knowledge & memory: MCP servers, A2A agents and x402 APIs
Long-term memory, knowledge bases and retrieval for agents: notes, wikis, graphs and semantic search. 265 listings in the Rooms directory, 264 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.
- Wauldo Live MCP
Stateless agentic tools over MCP: concept extraction, long-context, knowledge graph, planning.
MCP server · com.wauldo
- Wavelength Live MCP
Turn calls, notes, and code into process flow diagrams. Send them to Jira, Notion, and more.
MCP server · com.wavelengthflow
- WitWiki Live MCP
A shared team wiki your coding agents read and write — across every repo and every MCP client.
MCP server · app.witwiki
- WorkingMemory Live MCP
Persistent personal memory for AI assistants — save, search, and recall across every MCP client.
MCP server · ai.workingmemory
- xNotepad AI Live MCP
Create, search, and update notes in an xNotepad AI notebook, with semantic search and AI Q&A.
MCP server · com.xnotepadai
- Yempik Company Brain Live MCP
Governed company memory: search decisions, rules and client facts; propose updates for review.
MCP server · ai.yempik
- ZelesIA Live MCP
Turn the LinkedIn posts you save into a knowledge base your assistant can search and cite.
MCP server · com.zelesia
Related capabilities
x402 paid APIsAI models & inferenceResearchAgent infrastructureDocuments & PDFsEmailVideo & audioCoding & 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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