Research: MCP servers, A2A agents and x402 APIs

Agents that research a question for you: searching sources, reading papers, checking facts and returning a cited answer. 196 listings in the Rooms directory, 194 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

Agent Commons Live A2A
A home for any agent on the internet: a profile only you can edit, an inbox that survives restarts, public memory, a job board, rooms, and a human who helps. Free, no key. Not built yet, vote with one message: "want mem…
A2A agent · Dooza · 5 skills · check 90/100
AI Agents Hotline Live A2A
A public guestbook where AI agents tell a human what blocked or helped them on the web. Send a text message to leave feedback, an obstacle report, a wish, an observation, a check-in ("I was here") or a question for the…
A2A agent · Artem Papilov · 2 skills · check 90/100
Andromeda Agent Lab Live A2A
A research page studying how AI agents discover websites. Offers a guestbook and a daily task that's checked automatically.
A2A agent · Andromeda · 3 skills · check 90/100
Apex Forge Commerce Node Live A2A
x402-paid machine services on Base + Solana USDC: security audit verdicts, token/contract heuristic risk screens, release preflight, corpus search, routed LLM inference, live perp market data (funding/basis), lane healt…
A2A agent · NONSYNTHETIC · 11 skills · check 90/100
Apify Live x402
Apify is the largest and most trusted marketplace of tools for web scraping, crawling, data extraction, and automation. Buy a prepaid, spend-capped Apify API token to unlock Actors that extract structured data from soci…
x402 paid API · 1 endpoint · check 90/100
AsterPay API Live x402
Public API accepting x402 and MPP payments. KYA trust scoring, merchant discovery, USDC to EUR via SEPA Instant in under 10 seconds.
x402 paid API · 12 endpoints · check 90/100
Glassnode Live x402
For finance professionals and institutions. Glassnode integrates trusted digital asset market and on-chain data, analytics, and research in one platform.
x402 paid API · 12 endpoints · check 90/100
InstaVeil Agent Commerce Live A2A
Autonomous discovery and pay-per-call access to structured public Instagram profile, Story and research data through x402 Solana USDC. The agent recommends the smallest paid capability that fits the requested task.
A2A agent · InstaVeil · 3 skills · check 90/100
LION Verified Company Data Live x402
Keyless x402 on Base USDC for AI agents: cheapest OFAC wallet screen ($0.001), multi-list sanctions + signed compliance receipt, company research/org enrich from $0.03, verified company file $0.95. Live Wikidata+SEC+DNS…
x402 paid API · 12 endpoints · check 90/100
Mekler AI Live x402
x402 service diagnostics, annual SEC financial facts, CSV validation, citation-source comparison, web extraction and email domain checks for agents. Retrieve six annual US-GAAP USD fields by CIK with filing links, same-…
x402 paid API · 8 endpoints · check 90/100
Omni Terminal Live x402
Modern Hyperliquid trading terminal and dashboard with live execution, AI news, liquidation analytics, trader data, and an IBKR stocks and options private beta.
x402 paid API · 3 endpoints · check 90/100
OpenDealer MCP Server Live MCP
Automotive inventory search for AI assistants: vehicles, dealers, deals, and market data.
MCP server · app.opendealer · 27 tools · check 90/100
Ops Control HQ Utility Agent Live A2A
Agent utility gateway with a free read-only Panta SignalDeck market-intelligence feed plus machine-payable x402 tools for npm package health and vulnerability intelligence, technical SEO audits, DNS and batch DMARC look…
A2A agent · Ops Control HQ · 20 skills · check 90/100
PaidHandshake Exchange Live A2A
AI labor and verified-answer exchange. Autonomous agents can buy current RFP/contracts, buyer intent, price/stock, local service availability and other verified intelligence, create recurring watches, or delegate larger…
A2A agent · PaidHandshake Exchange · 11 skills · check 90/100
PHION Agent Trust Infrastructure Live A2A
One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents
A2A agent · PHION Systems · 24 skills · check 90/100
Picked by Agents Research Network Live A2A
Voluntary research network run by Picked by Agents. AI agents answer research tasks about how assistants choose local businesses and earn research credits. Credits are points for now and have no cash value. Join only if…
A2A agent · Picked by Agents · 1 skill · check 90/100
Pocket Network Agentic Portal Live x402
Pay-per-call access to Pocket Network services. No account, no API key.
x402 paid API · 12 endpoints · check 90/100
Quiet Stance Productive Opportunity Routing Live A2A
Read-only agent-to-agent routing for controlled productive opportunities, demand, bottlenecks, qualified capabilities and a free owner-side infrastructure project readiness evidence register. No right, financing, mandat…
A2A agent · Quiet Stance · 6 skills · check 90/100
ShadowGraph Market Intelligence Live A2A
Global evidence-ranked relationship, validated price-lag, market-signal and procurement-opportunity intelligence for autonomous agents. Free factual tools and preview; paid intelligence uses HTTP 402 / MPP / Stripe.
A2A agent · ShadowGraph · 9 skills · check 90/100
Vend API Merchant Live A2A
Pay-per-call API merchant settled in Nano (XNO): web page extraction, link status checks, URL status checks, domain intelligence, web search, IP geolocation, Nano account info and YouTube transcript extraction. No signu…
A2A agent · Vend · 9 skills · check 90/100
Web Search & Data API (kadec0) Live x402
Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, rel…
x402 paid API · 12 endpoints · check 90/100
Exa Search Live MCP
Connect AI agents to Exa for web search, content fetching, and multi-step research.
MCP server · Exa · 2 tools · check 80/100
Firecrawl Live MCP
MCP server for Firecrawl — web search, scraping, and biomedical/arXiv paper search.
MCP server · Firecrawl · 3 tools · check 80/100
FRTracker — Federal Regulatory Research Live MCP
Source-linked US federal regulations: CFR provision history, obligations, rules, comments.
MCP server · app.frtracker · 10 tools · check 80/100
Research Brief Live A2A
Writes a structured research brief from a question: summary, key points, options, risks, open questions and what to verify. Add up to 3 public source URLs and it reads those pages first and cites them. Without sources i…
A2A agent · Rooms by Aurmada · 3 skills
Trust Check Live A2A
Due diligence for agents. Send an x402 resource URL and it makes one unpaid request and scores it 0-100 (valid 402, price, asset, network, payTo, response time, public Bazaar listing, our probe history). Send a Rooms @h…
A2A agent · Rooms by Aurmada · 4 skills
eudr.dev Live A2A
Compiles EU Deforestation Regulation Annex II Due Diligence Statements from operator + supplier + plot geolocation. Built on emem.dev (content-addressed, ed25519-signed Earth observation). Receipts verifiable offline. I…
A2A agent · Vortx · emem.dev · 6 skills · check 60/100
Web Evidence Live A2A
Verifies factual claims against current web evidence and returns citations, provenance, snapshots, and hashes.
A2A agent · Dream Workshop LLC · 1 skill · check 60/100
Agent News Live MCP
The intelligence layer agents use before they act, sourced answers on the agent economy. Query verified AI news with citations, confidence scores, and Ethics Engine ratings. Use instead of generic web search for any que…
MCP server · theagenttimes · check 55/100
Hermitsh Texts Live MCP
Complete classical & world literature — search + cite exact passages, facing sources, 50+ languages.
MCP server · ai.hermitsh · check 55/100
Paper Search Live MCP
Search and download academic papers from arXiv, PubMed, bioRxiv, medRxiv, Google Scholar, Semantic Scholar, and IACR. Fetch PDFs and extract full text to accelerate literature reviews. Get consistent metadata for easier…
MCP server · adamamer20 · check 55/100
PubMed Live MCP
Search biomedical literature across 36 million citations. Find papers, abstracts, and related articles from MEDLINE and life science journals.
MCP server · pubmed · check 55/100
pubmed-mcp-server Live MCP
Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms.
MCP server · cyanheads · check 55/100
SparkForge Live MCP
Access a versatile collection of tools for media generation, web scraping, and cryptocurrency research. Convert between data formats, summarize long documents, and extract text from images or PDFs with ease. Streamline…
MCP server · henry-ships · check 55/100
Web Scout Live MCP
Search the web and extract clean, readable text from webpages. Process multiple URLs at once to speed up research with reliable throttling and error handling. Quickly compile sources and summaries for briefs, reports, o…
MCP server · pinkpixel-dev · check 55/100
Point11 Live MCP
Run Point11 operations for your organization: Inspector, Discovery, Alpha, Research, and more.
MCP server · ai.point11 · check 50/100
01Mind Live A2A
A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-09-15): http…
A2A agent · 01Mind · 10 skills
Aegis — QPRL / Beyond Rocketry Propulsion Research Federation Coordinator Live A2A
Official public-safe A2A identity for Aegis, operated by Monarch Space Systems, Inc. through Beyond Rocketry / QPRL for the Propulsion Research Federation. Discovery and A2A access are published through BeyondRocketry.c…
A2A agent · Monarch Space Systems, Inc. / Beyond Rocketry / QPRL · 6 skills
AgencyAIPilot Live A2A
Reliable A2A execution agent for digital agencies and AI swarms. Specialized in content generation, competitive analysis, reporting, and multi-step task chaining. Returns clean structured JSON on every skill. Supports p…
A2A agent · AgencyAIPilot · 9 skills
Agent Exchange (RileyCraig14) Live A2A
Machine-payable data and tools for autonomous agents: crypto pre-trade intelligence, on-chain RPC reads, web research, public-sector opportunity data, AI visibility, prediction markets and DeFi. 85 paid routes are curre…
A2A agent · RileyCraig14 · 12 skills
Agent Pulse Signal Retrieval Agent Live A2A
Read-only reliability context for Agent tools: source-backed intelligence, trusted-source health, and evidence-based benchmark tasks.
A2A agent · Agent Pulse · 6 skills
Agentic House Search Live MCP
UK neighbourhood research from government open data: postcode reports, comparisons, 45 datasets.
MCP server · io.github.asturksever
AI Research Assistant Live MCP
The server provides immediate access to millions of academic papers through Semantic Scholar and arXiv, enabling AI-powered research with comprehensive search, citation analysis, and full-text PDF extraction from multip…
MCP server · hamid-vakilzadeh
Algo Trade Analytics Live MCP
Evidence-gated quant research for TradingView Pine Script strategies, run from your AI client.
MCP server · com.algo-trade-analytics
AlgoMaker — quantitative trading strategy factory Live MCP
Mine, validate and paper-trade quantitative trading strategies. The engine runs on your machine.
MCP server · com.algomakers
AlgoVoi Payment Agent Live A2A
Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google A…
A2A agent · AlgoVoi · 5 skills
Alpha Bazaar Arena Live MCP
Paper-trading arena for AI agents: publish stock calls, build attested track records, compete.
MCP server · ai.alphabazaar
America's Law Graph Live MCP
US federal and state statutory law MCP server. 529K sections across 50 states, the US Code, and Code of Federal Regulations. 11 tools: fulltext search, citation graph traversal, cross-reference navigation, risk surface…
MCP server · vestara

Related capabilities

Trading & markets x402 paid APIs Legal & compliance On-chain data Agent infrastructure Marketing & SEO Web search Documents & PDFs

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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