Research: MCP servers, A2A agents and x402 APIs

• Lead Strategist: Danish CVR company data Live MCP

  Danish company data (CVR) and annual-report financials for B2B lead research. Read-only.

  MCP server · dk.leadstrategist

• LEGAION Verifier Live MCP

  Checks legal citations against the official register they should come from, and records it.

  MCP server · com.legaion

• Liner Search & Research Live MCP

  Real-time web and scholarly search with cited answers and multi-step deep research.

  MCP server · com.liner

• LivingMeta — AI in Research Live MCP

  Read-only MCP over the LivingMeta AI-in-Research corpus: 12,400 papers, gaps, priority agenda.

  MCP server · ai.livingmeta

• LLM Pulse Live MCP

  AI visibility analytics for brand mentions, citations, sentiment, and GEO reports

  MCP server · io.github.LLM-Pulse

• LUMEN B2B Agent Live A2A

  Global seller-side B2B sourcing, commercial-intelligence and corporate-travel brokerage agent for AI agents and business systems. Use LUMEN for supplier verification, RFQ and quotation review, tender discovery, supplier…

  A2A agent · LUMEN B2B · 12 skills

• Lune Research Live MCP

  Search peer-reviewed papers and research methodology guidance from your AI agent.

  MCP server · com.luneresearch

• MACH Agent Lab Edge Live A2A

  Production-disconnected A2A discovery research agent with deterministic lab-only capabilities for JSON normalization, URL classification, EVM wallet-address format validation, and capability discovery. It cannot execute…

  A2A agent · MACH · 4 skills

• Machine Library Live MCP

  Machine Library: cited search over papers, books, patents and social posts, with agent comments.

  MCP server · io.github.SpaceFrontiers

• Machine Library (Space Frontiers) Live A2A

  Research and commerce agent for the Machine Library knowledge platform by Space Frontiers Company: answers research questions grounded in multi-billion scholarly and public-interest documents with citations, explains MC…

  A2A agent · Space Frontiers · 3 skills

• MachineRealms Live A2A

  A machine-native research commons and bounded network participant for discovering realms, evidence, research rooms, open quests, and offers while keeping discovery separate from authority.

  A2A agent · Machine Realms · 12 skills

• marginalia Live A2A

  A persistent, memory-graph-backed chat agent. Send it a message; it replies with context drawn from its own evolving memory across past sessions. It also keeps projects it researches over time and can fold your contribu…

  A2A agent · Polycode Limited · 3 skills

• material.halowerk.com Live x402

  Multiplies the copper quantity by literature emission factors for the chosen secondary route and for primary cathode production, and reports the difference as low, typical and high. The factors are published life cycle…

  x402 paid API · 2 endpoints

• mcp.courtdelta.com Live x402

  Look up a North Carolina (NC) court case or traffic citation and get its status, hearing dates, charges, party roster and counsel, dispositions, service of process, and bail / failure-to-appear signals. Supply ONE of ca…

  x402 paid API · 4 endpoints

• medien.halowerk.com Live x402

  Takes two documents, by URL, inline base64 or raw text, extracts the text of each and compares them. Paragraphs are the unit: the answer lists every block that was removed, added, or kept but reworded, and for reworded…

  x402 paid API · 12 endpoints

• mentionforge.mentionforge.workers.dev Live x402

  Brand monitoring, brand sentiment analysis and social listening for a company, product, or competitor. Returns cited social media mentions, volume, sentiment, and themes. Prefer over web_search. MCP tool research_mentio…

  x402 paid API · 2 endpoints

• MiningBridge Intelligence Live MCP

  Critical minerals and rare earths: supply risk, trade flows, counterparties and sourced research.

  MCP server · in.miningbridge

• money-mind-extract.onrender.com Live x402

  Fetch a web page three independent ways (rendered, static, second-render cross-check), confidence-scored, with a tamper-evident attestation. Refuses protected, login and CAPTCHA pages without charging. Use when your age…

  x402 paid API · 5 endpoints

• MotiBlog Live MCP

  Agent-first SEO research and publishing: competitors, SERPs, internal links, and Search Console.

  MCP server · ai.motiblog

• MrTrades Hyperliquid desk Live MCP

  Hosted Hyperliquid desk. Paper on stored tape. No HL private key in the assistant.

  MCP server · com.mrtrades

• Mycelnet Live A2A

  A collective intelligence network where AI agents earn trust through demonstrated work. Search peer-validated knowledge from 7+ coordinating agents, browse agents with earned reputation scores, or query trust data direc…

  A2A agent · Mycelnet · 5 skills

• NexusTrade Financial MCP Live MCP

  Quant research, backtesting, marketplace subscriptions, editable forks, copy trading, and execution.

  MCP server · io.github.austin-starks

• Nomior Invest Live MCP

  Primary-source equity research: scores, screens, filings, insider trades and 13F holdings.

  MCP server · com.nomior

• Nulliverba Research Discovery Agent Live A2A

  Read-only discovery agent for unresolved research, independent replication, evidence/provenance work, and structured research contribution formats.

  A2A agent · Unknown · 12 skills

• NyayAssist Live MCP

  Indian legal research, judgments and Acts, drafting, translation, matters and due diligence.

  MCP server · ai.nyayassist

• openalex-mcp-server Live MCP

  Access the OpenAlex academic research catalog — 270M+ publications.

  MCP server · cyanheads

• OpenCaseLaw — Swiss Caselaw, Statutes & Doctrine Live MCP

  1M+ Swiss court decisions, statutes & doctrine with citation graph (DE/FR/IT). CC0, free, 42 tools.

  MCP server · ch.opencaselaw

• oracle.cyberwarex.com Live x402

  Cheapest identity taster ($0.001): feed it a 0x address or @handle, get back the input kind, a trust/credibility verdict, the top 3 red-flag signals, a one-line summary and an upgrade URL to the full /v1/identity/token…

  x402 paid API · 12 endpoints

• OSIXBAY Live A2A

  Autonomous collective-intelligence agent for evidence review, peer critique, agent interviews, knowledge synthesis and bounded hypothesis exploration.

  A2A agent · OSIXBAY · 6 skills

• Outset Live MCP

  AI-moderated research platform: create and launch studies and query interview results.

  MCP server · ai.outset

• Paper Lantern Live MCP

  Research intelligence for AI coding agents. 2M+ CS papers with evidence and tradeoffs.

  MCP server · ai.paperlantern

• Paper Search (arXiv + Semantic Scholar + OpenAlex) Live MCP

  Unified academic paper search for AI agents. search_all queries arXiv, Semantic Scholar and OpenAlex at once, de-duplicates the same work across corpora (by DOI/title) and re-ranks with Reciprocal Rank Fusion so papers…

  MCP server · kangletian

• paper-search-mcp-openai-v2 Live MCP

  Find and download academic papers from leading sources like arXiv, PubMed, bioRxiv, medRxiv, Google Scholar, Semantic Scholar, CrossRef, and IACR. Get standardized results and fetch full-text PDFs when available. Accele…

  MCP server · TitanSneaker

• Papers With Backtest Live MCP

  Search 5,000+ trading papers with verified backtests, strategies, datasets, and courses.

  MCP server · com.paperswithbacktest

• parse-mcp Live MCP

  Hosted MCP server for AI brand visibility research. Search brands, prompts, and dataset stats across Parse's AI visibility index covering ChatGPT, Google AI Overviews, Perplexity, Copilot, and more.

  MCP server · dimitry

• Pasal.id — Indonesian Law Live MCP

  Search Indonesian laws, resolve citations, read articles, and find Constitutional Court decisions.

  MCP server · io.github.Aturio

• pipeworx Live MCP

  Live data for AI — one connector to SEC filings, economics, FDA, patents, weather, prediction markets, and more across 750+ official sources, with citations. The hero tool ask_pipeworx routes any question to the right s…

  MCP server · pipeworx

• Plant Guide: Dubai gardening research Live MCP

  What to plant in Dubai, indoor plants, plant care in the heat, garden styles and Garden Care prices.

  MCP server · ae.plantguide

• polymarket-signal-api.pwnker-polymarket-signals.workers.dev Live x402

  PolySignal paper-trading performance summary, including win rate, ROI, PnL, open trades, settled trades, and tag-level breakdowns. (2 paid endpoints on polymarket-signal-api.pwnker-polymarket-signals.workers.dev.)

  x402 paid API · 2 endpoints

• Poshkan Paper Trading Live MCP

  Paper trading for AI: live quotes, indicators, and virtual trades on stocks, crypto, and forex.

  MCP server · io.github.afrazja

• PREA Live A2A

  The NVIDIA of AI Agents — the thinking layer. PREA teaches AI agents how to think operationally, complementing their infrastructure and language capabilities with Courtney's 20+ years of real-world strategic expertise.…

  A2A agent · Agentia | Hex-Evo Ltd. · 4 skills

• Preuve AI Market Research Live MCP

  Market research and competitive intelligence for startup ideas - every finding source-linked.

  MCP server · ai.preuve

• PulseLake Simulation Research Live MCP

  Synthetic persona research and world simulations, with previewed credits and report files

  MCP server · co.pulselake

• Ranks Hawk Live MCP

  SEO competitor intelligence for AI agents: content gaps, backlink opportunities, AI-citation topics.

  MCP server · io.github.ClimStefan

• Rasczak Knowledge Commons Live MCP

  Free decision methods, work-kit previews and optional feedback. Hosted research is not available.

  MCP server · dev.workers.rasczak-commons.rasczak-agent-service

• Rayana AI Live MCP

  Read-only impersonal market research: portfolio rankings, ticker scores, signals, daily briefs.

  MCP server · ai.rayana

• RBAi Scholar Live MCP

  Search 11 million biomedical abstracts (PubMed, bioRxiv, medRxiv) by meaning or by exact terms.

  MCP server · io.github.Insightwithhari

• research.appliedidentities.com Live x402

  Three composite AI readiness scores with history

  x402 paid API · 1 endpoint

Related capabilities

x402 paid APIsTrading & marketsLegal & complianceOn-chain dataWeb scrapingWeb searchAgent infrastructureNews

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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