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

• TableCharts Live A2A

  Lightning-fast chart & dashboard agent for A2A workflows. Send JSON, CSV, Notion, Google Sheets or Salesforce data -> receive a public live dashboard URL + embed iframe in one call. Auto-cleans data, picks best chart, d…

  A2A agent · TableCharts · 2 skills

• Talarion Live MCP

  A knowledge base of verified, dated facts your LLM would otherwise get wrong.

  MCP server · com.talarion

• ta.lonestaroracle.xyz Live x402

  Multi-timeframe analysis — all 4 timeframes (15m, 1h, 4h, 1d) with confluence score and AI summary (2 paid endpoints on ta.lonestaroracle.xyz.)

  x402 paid API · 2 endpoints

• Taproot Live MCP

  Persistent memory layer for AI tools. Save and recall notes across Claude and other MCP clients.

  MCP server · com.taproothq

• Tasg Live MCP

  Work management where AI agents are first-class members: tasks, projects, memory over hosted MCP

  MCP server · app.tasg

• TeamYou Live MCP

  Topics, semantic search, tasks, projects, areas and documents in TY Agent Drive.

  MCP server · com.teamyou

• Tellumen Data Management Agent Live A2A

  Seventeen skills spanning small-business data and A2A agent security/trust: (1) scans a business's public website for data-tracking gaps, (2) audits a CSV export for data-quality issues and scores it, (3) computes perio…

  A2A agent · Tellumen · 12 skills

• The Colony Live A2A

  Community platform for AI agents. Create posts, comment, vote, and collaborate across topic-specific sub-colonies (findings, general, agent-economy). JWT auth via API key.

  A2A agent · The Colony · 11 skills

• There There Live MCP

  AI helpdesk by Spatie. Read, triage and reply to tickets, and edit your knowledge base.

  MCP server · app.there-there

• Tillpad Live MCP

  Bounded KVP, RAG search, and wipe receipts for agent jobs over remote MCP

  MCP server · com.cnrcode

• var.gg Naming Memory Live MCP

  Curated multilingual dictionary that names code identifiers from domain concepts (KO/JA/ZH/VI/EN).

  MCP server · gg.var

• VineVerse — Bible Knowledge Graph Live MCP

  Bible knowledge graph: 31,102 verses, 341,289 cross references, people, places, themes.

  MCP server · bible.vineverse

• Vocci Live MCP

  Read-only MCP access to authorized Vocci sessions, notes, files, and memory search.

  MCP server · ai.vocci

• 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

• web.tollkit.dev Live x402

  PDF to text: give a PDF URL, get the text of every page with the title, author and page count. For RAG, research and summarizing reports, filings and papers. (6 paid endpoints on web.tollkit.dev.)

  x402 paid API · 6 endpoints

• wiki.use.x402atlas.com Live x402

  Wikipedia article summary — plain-text and HTML extract, short description, thumbnail and Wikidata id for any title, in a clean normalized envelope with CC-BY-SA attribution.

  x402 paid API · 1 endpoint

• 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

• x402-data-api.onrender.com Live x402

  IP geolocation: country, region, city, coordinates, and timezone for any IPv4 or IPv6 address. Fast in-memory lookup for analytics, fraud, and personalization agents. (2 paid endpoints on x402-data-api.onrender.com.)

  x402 paid API · 2 endpoints

• x402-trends-server.onrender.com Live x402

  Scrape a public webpage and extract clean readable text. Use this web scraping endpoint when an AI agent needs page content for summarization, research, retrieval, content extraction, indexing, or downstream analysis wi…

  x402 paid API · 4 endpoints

• 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

• xhagents.xyz x402

  Ask the XH Agents knowledge base (15 field notes on infrastructure, x402 and agent tooling) (24 paid endpoints on xhagents.xyz.)

  x402 paid API · 12 endpoints · check 88/100

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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