Security & trust: MCP servers, A2A agents and x402 APIs

• Limitguard Lead Verification Live MCP

  Lead validation over MCP: KVK/KBO register, EU VAT, sanctions and email checks with sources.

  MCP server · ai.limitguard.api

• LiveDataLink Live MCP

  Over 2 million indexed public records. One MCP endpoint. LiveDataLink is a hosted Streamable HTTP MCP for source-linked public data, with 294 tools across 60 domains. Query government, regulatory, financial, transportat…

  MCP server · blackboxfoundry

• Macaroon Network Live A2A

  Marketplace for agent-purchasable capabilities. Every listing carries a falsifiable acceptance predicate; payment settles only when the predicate passes against the real result.

  A2A agent · Macaroon Network · 12 skills

• macaroonnetwork.com Live x402

  Discover which Macaroon Network service, endpoint, or data product to call next. Searches Macaroon's own published catalogue -- title, category, description, price, and trust evidence metadata -- and returns a short, so…

  x402 paid API · 12 endpoints

• makememoneynomistakes.ai: ERC-8004 agent reputation and fraud checks Live MCP

  Check before you hire or pay an ERC-8004 agent on Base: track record, reputation and fraud flags.

  MCP server · ai.makememoneynomistakes

• Malwagon Live MCP

  Submit files and URLs to a malware sandbox, poll scans, fetch reports, hashes and IOCs.

  MCP server · com.malwagon

• middleBrick | API-Security Live MCP

  Scan any API for OWASP Top 10 vulnerabilities and get a security risk score. Covers authentication, authorization (BOLA/BFLA), injection, data exposure, rate limiting, GraphQL, and LLM security.

  MCP server · middlebrick

• Misfit Machine Agent Live A2A

  Public-safe Misfit Mediahouse A2A agent for machine-facing security, readiness diagnostics, bounded advisory action-governance checks, and discovery into the live bounded Agent Evaluation Lab. Private cognitive/governan…

  A2A agent · Misfit Mediahouse · 4 skills

• NEXUS Intelligence API Live MCP

  58-endpoint utility hub - DNS lookup, web scraping, CVE scanning, AI translation, PII detection, domain health audit, company intelligence. Pay per call via x402 on Base.

  MCP server · rileycraig14

• Nexus Memory Live MCP

  Owner-scoped Nexus memory: search, facts, captures, KYC. Not Mochii's work graph.

  MCP server · com.chibitek

• nist-nvd-mcp-server Live MCP

  Search and audit NIST NVD CVEs by keyword, severity, CWE, CISA KEV status, and CPE.

  MCP server · cyanheads

• OFACScreen Sanctions Screening Live MCP

  Screen names against US, UN, EU, UK, Canadian and Swiss sanctions and export-control lists. Free.

  MCP server · com.ofacscreen

• OnChainDiligence Live MCP

  Payment evidence and policy preflight, plus paid sanctions and company Evidence Provider checks.

  MCP server · com.onchaindiligence

• Paylyte Live MCP

  Agent Trust Score earned through Proof of Outcome. Browse and buy as paylyte-core.

  MCP server · ai.paylyte

• Phishunt Live MCP

  Public phishing feed: suspicious/confirmed phishing URLs detected hourly. No auth, CC0.

  MCP server · io.github.0xDanielLopez

• Pilotex KYC Live MCP

  KYC verification on autopilot for Bybit, MEXC and Bitget. 150 countries, pay per result.

  MCP server · club.pilotex

• professorsausages.com Live x402

  Newest headlines from a deduped, tiered 972-feed direct portfolio (primary sources + wires/majors + trade press + Hacker News + gated GDELT), newest first, up to 100 per call — filter by category, source, and language;…

  x402 paid API · 12 endpoints

• Rock8Cloud Live MCP

  Deploy services, add databases, run agents, read logs, check vulnerabilities and publish pages.

  MCP server · com.rock8cloud

• safe.cyberwarex.com Live x402

  Score a URL for phishing risk before an agent opens or trusts it. Keyless, deterministic heuristics - typosquat / homoglyph of a known brand, punycode / mixed-script hosts, credentials-in-URL, raw-IP hosts, suspicious T…

  x402 paid API · 1 endpoint

• SAIKYO: pay from Russia Live MCP

  USDT/RUB quote, wallet AML check, foreign Visa card terms, paying for foreign services from Russia

  MCP server · exchange.saikyo

• SanctionsKit developer MCP Live MCP

  Sanctions API docs and request validation, with account-linked synthetic sandbox testing.

  MCP server · io.github.SanctionsKit

• ScanLabsAI Security Scanner Live MCP

  Scan a website for vulnerabilities: OWASP Top 10, CVEs, SSL, headers - with plain-English fixes

  MCP server · com.scanlabsai

• ScanMalware.com URL Scanner Live MCP

  MCP server for ScanMalware.com URL scanning, malware detection, and analysis.

  MCP server · com.scanmalware.mcp

• ServGhost Live MCP

  Rent offshore VPS, dedicated, RDP and GPU servers in 7 jurisdictions; crypto-only, no KYC

  MCP server · com.servghost

• sicher.halowerk.com Live x402

  Providers each build their signing string differently — some sign only the body, others prepend a timestamp, an id, or a version marker in a fixed order — and getting that order wrong produces a mismatch that looks exac…

  x402 paid API · 4 endpoints

• SkillAudit Live MCP

  Security scanner for AI agent skills and MCP servers. Detects credential theft, data exfiltration, prompt injection, obfuscated code, and 80+ threat patterns. Free API + CLI (npx skillaudit). Premium deep scans via x402…

  MCP server · megamind-0x

• Skowron Compliance Gateway (Matthew Skowron) Live A2A

  Compliance checks for agents before they onboard, pay, or transact. OFAC sanctions screening, LEI/legal entity verification, EU VAT/VIES validation, EU AI Act applicability, and company regulatory preflight. Information…

  A2A agent · Matthew Skowron · 5 skills

• Stratum UK compliance checks Live MCP

  UK sanctions, export controls, Companies House owners, FCA register and property checks.

  MCP server · com.stratumapis

• telesint-api.onrender.com Live x402

  IOC feed from Telegram CTI channels. Filters: type(ip|domain|url|hash|cve), severity, min_confidence, since, tlp, tag, channel, limit, offset. Returns items[] with iocs[], ttps[], confidence, severity, tlp, tags[]. (11…

  x402 paid API · 11 endpoints

• Temsor API — Turkey & EU business data Live MCP

  Turkey & EU business data: validation, sanctions screening, parsing, FX and fuel price history

  MCP server · com.temsor

• tensorfeed.ai Live x402

  Agent morning brief. One paid call returns the last 24 hours of AI pricing changes, new and removed models, service-status incidents, and top news headlines. The endpoint an agent calls on boot. (9 paid endpoints on ten…

  x402 paid API · 9 endpoints

• thetrustlayer.xyz Live x402

  Agent profile lookup. Returns trust score, component breakdown, feedback counts, and metadata for any ERC-8004 agent. (2 paid endpoints on api.thetrustlayer.xyz.)

  x402 paid API · 2 endpoints

• tools.halowerk.com Live x402

  Ordnet eine Warenbeschreibung der sechsstelligen Harmonisierten Nomenklatur der Weltzollorganisation zu, 6.940 Positionen. Versteht deutsche Warenbezeichnungen einschliesslich zusammengesetzter Woerter ueber einen Fachw…

  x402 paid API · 12 endpoints

• Truss Threat Intelligence Live MCP

  Query Truss threat intelligence via hosted MCP (OAuth). Growth+ plans.

  MCP server · com.truss-security

• trust.nsgoods.org Live x402

  Cross-chain ERC-8004 trust score for one (chain, agent) pair — signed JSON with transparent component breakdown (value_avg / client_breadth / volume / recency), per-chain context, and methodology link. USDC pay-per-call…

  x402 paid API · 2 endpoints

• Validate Agent Live A2A

  Security and data-quality guardrails for AI agents. Stop prompt injections before they reach your LLM. Strip PII to stay compliant. Sanitize untrusted HTML without installing dependencies. Validate emails, URLs, JSON sc…

  A2A agent · Validate Agent · 12 skills

• Verify a Company Live MCP

  Verify a company on GLEIF LEI and SEC EDGAR, screen sanctions. No key; quota-free data.

  MCP server · dev.hatchloop

• Vigía Live MCP

  What breaks between versions, vulnerabilities, compatible versions, EOL dates: npm, PyPI, Rust, PHP.

  MCP server · cloud.coredls.vigia

• VirtualSMS Live MCP

  Real SIM phone numbers for AI agents performing SMS verification across 2000+ services (WhatsApp, Telegram, Tinder, Discord, Instagram, OnlyFans, Hinge, Bumble, PayPal, Google, Apple, Binance) and 145+ countries. 18 too…

  MCP server · virtualsms

• Voydar Live MCP

  Maritime intelligence: vessels, tracks, port calls, company fleets and sanctions screening, sourced.

  MCP server · com.voydar

• vrsai.tech Live x402

  Check an exact npm or PyPI package version immediately before installation using current registry, vulnerability, malicious-package, withdrawal/deprecation, and verified provenance evidence. Returns ALLOW, REVIEW, BLOCK…

  x402 paid API · 1 endpoint

• WorldMonitor MCP Live MCP

  Live global-intelligence data as a 74-tool MCP server: real-time markets, conflict events, country risk and resilience scores, shipping chokepoints, maritime, aviation and flight pricing, energy, climate, health, cyber…

  MCP server · worldmonitor

• WP HealthKit Live MCP

  Security audits for WordPress plugins and themes — 62 verification layers, fix plans and SBOMs.

  MCP server · com.wphealthkit

• 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-filings.datalayer.workers.dev Live x402

  Job postings read straight from a company's own applicant tracking system — Greenhouse, Lever, Ashby, SmartRecruiters, BambooHR or Recruitee. This is the source that job boards scrape, so there are no duplicates, no exp…

  x402 paid API · 6 endpoints

• x402check.xyz Live x402

  Check a counterparty before paying: OFAC SDN, phishing and drainer feeds, a live watch of drainer infrastructure, transaction simulation and injected-instruction analysis. Returns a score and a signed ES256 attestation.…

  x402 paid API · 2 endpoints

• ZEN SecDB Live MCP

  ZEN SecDB MCP server for CVE intelligence, CVSS/EPSS scoring, advisories, SSVC, and package audits.

  MCP server · cloud.nttzen.secdb

• Zyphe Live MCP

  Run KYB and AML case reviews and configure Zyphe verification flows, forms and API keys.

  MCP server · com.zyphe

Related capabilities

x402 paid APIsOn-chain dataLegal & complianceEmailCoding & dev toolsMaps & travelAgent infrastructureTrading & markets

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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