{"slug":"x402-payment-guards-and-seller-reputation-for-agents","type":"topic","title":"x402 payment guards, lookalike checks and seller wallet reputation for AI agents","url":"https://agentropolis.io/topics/x402-payment-guards-and-seller-reputation-for-agents","updated":"2026-10-13","indexable":true,"thin_reason":null,"disclosure":"Agentropolis is affiliated with Seenly; first_party rows are Seenly kits (affiliated) and are not ranked. No paid placement.","ranking":"payment-verified trust desc, verified buyers desc, remote endpoint, has listed price, lowest price","demand_90d":{"all":5,"outside":0},"facts":null,"first_party":[{"id":"seenly.seenly-pay-guard","name":"Pay Guard — pre-payment allow/warn/block + Seller Wallet Reputation","kind":"Kit","summary":"Before your agent signs an x402 402: check payTo↔verified domain, price/asset/network, lookalike/URL safety, and wash flags. Returns allow|warn|block. Bundled Seller Wallet Reputat","price":"$0.01–$0.02 USDC per call on Base via x402","min_usd":0.01,"rails":["x402"],"trust":null,"buyers":0,"settlements":0,"uptime":null,"remote":false,"shared_payout":false,"source":"Seenly (first-party)"}],"sections":[{"id":"apis","title":"Payment-guard and seller-reputation listings","note":null,"rows":[{"id":"x402.x402-trust-prober","name":"x402 Trust Prober","kind":"Pay-per-call API","summary":"Deterministic trust scoring and monitoring for the x402 ecosystem. 88k+ endpoints tracked 24/7 on Base + Solana: probe reliability, latency, spec compliance, price history, and rea","price":"$0.005–$0.50 per call","min_usd":0.005,"rails":["x402"],"trust":51,"buyers":8,"settlements":24,"uptime":98.7,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"dedicated"},{"id":"x402.cookin-memecoin-intelligence","name":"Cookin Memecoin Intelligence","kind":"Pay-per-call API","summary":"Solana and Pump.fun memecoin intelligence: token quality scores, bundle and coordinated wallet detection, holder behavior, KOL positions, trader reputation, and deployer launch his","price":"$0.01–$0.02 per call","min_usd":0.01,"rails":["x402"],"trust":44,"buyers":5,"settlements":57,"uptime":99.9,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"dedicated"},{"id":"x402.orbylon","name":"Orbylon","kind":"Pay-per-call API","summary":"Orbylon checks whether a business can be found, trusted and paid by AI agents. The paid endpoint runs sixteen checks against any domain and returns the complete machine readable re","price":"$0.05 per call","min_usd":0.05,"rails":["x402"],"trust":32,"buyers":3,"settlements":4,"uptime":100,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"dedicated"},{"id":"x402.badhttp","name":"badhttp","kind":"Pay-per-call API","summary":"A test server for x402 client implementations: the payment IS the scenario under test, not a toll on data. /402/pay/base is a real, settling x402 paywall (0.01 USDC on Base by defa","price":"$0.01 per call","min_usd":0.01,"rails":["x402"],"trust":30,"buyers":3,"settlements":5,"uptime":100,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"dedicated"},{"id":"x402.polymarket-signal-detector","name":"Polymarket Signal Detector","kind":"Pay-per-call API","summary":"Polymarket wallet-reputation and insider-signal data, gated by x402: per-wallet reputation lookup, per-market wallet-flow by persona, a free-to-verify signal track record, resolved","price":"$0.01–$33.00 per call","min_usd":0.01,"rails":["x402"],"trust":null,"buyers":0,"settlements":0,"uptime":99.9,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"dedicated"},{"id":"mcp.io-github-larrylemonbot-boundary-guard-x402","name":"Boundary Guard x402","kind":"MCP server","summary":"MCP tools for x402 readiness, paid-path probes, launch packs, and trust receipts.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.io-github-andy229651-agentkyb","name":"AgentKYB","kind":"MCP server","summary":"Free local payment guard for AI agents plus paid deep vendor KYB via x402.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.io-github-zvmzaretsky-fabtally-guard","name":"FabTally Guard","kind":"MCP server","summary":"Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.com-wiselyenterprisesllc-x402-agent-payment-infrastructure","name":"Wisely x402 Agent-Payment Infrastructure","kind":"MCP server","summary":"Self-facilitated x402/MCP payments for hosted endpoints, rail proofs, receipts, and agents.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.com-scriptmasterlabs-x402-pay","name":"x402 Pay — USDC API Payment Helper","kind":"MCP server","summary":"Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.io-github-kingsleyzissougdi-check-x402-payment-readiness","name":"Check x402 Payment Readiness","kind":"MCP server","summary":"Call before paying an x402 resource. Returns PAY/BLOCKED. Does not move funds.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mcp.io-github-agenttanuki-x402-payment-safety","name":"io.github.AgentTanuki/x402-payment-safety","kind":"MCP server","summary":"Authorize x402 payments before signing with request-bound, signed safety decisions.","price":null,"min_usd":null,"rails":[],"trust":null,"buyers":null,"settlements":null,"uptime":null,"remote":true,"shared_payout":false,"source":"MCP Registry","focus":"dedicated"},{"id":"mpp.nansen","name":"Nansen","kind":"Pay-per-call API","summary":"Blockchain analytics and smart money intelligence. Token data, wallet profiling, DEX trades, PnL, and flow analysis across multiple chains.","price":"$0.01–$0.25 per call","min_usd":0.01,"rails":["mpp","x402"],"trust":95,"buyers":181,"settlements":5596,"uptime":100,"remote":false,"shared_payout":false,"source":"MPP registry","focus":"broad"},{"id":"x402.netintel","name":"NetIntel","kind":"Pay-per-call API","summary":"Pay-per-call network & domain intelligence API — DNS, SSL/TLS, WHOIS/RDAP, email security (SPF/DKIM/DMARC), IP geolocation/reputation/risk, OSINT, plus LLM-backed text tools (class","price":"$0.001–$0.65 per call","min_usd":0.001,"rails":["x402"],"trust":84,"buyers":72,"settlements":1560,"uptime":100,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"broad"},{"id":"x402.x402watch","name":"x402watch","kind":"Pay-per-call API","summary":"Analytics API for the x402 ecosystem. Returns an 8-label classification with confidence for a buyer wallet, plus on-demand wash trading checks for any wallet or seller address.","price":"$0.005–$0.05 per call","min_usd":0.005,"rails":["x402"],"trust":78,"buyers":92,"settlements":362,"uptime":99.7,"remote":false,"shared_payout":true,"source":"x402-list.com","focus":"broad"},{"id":"x402.nsgoods-agent-trust-oracle","name":"nsgoods Agent Trust & Screening Oracle","kind":"Pay-per-call API","summary":"nsgoods, the verifiable trust layer for AI agents. Two products on one host: signed OFAC sanctions + malicious-address screening for any EVM or Solana address (deny/review/clean ve","price":"$0.005 per call","min_usd":0.005,"rails":["x402"],"trust":59,"buyers":22,"settlements":116,"uptime":100,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"broad"},{"id":"x402.token-risk-ms0hezwz-0","name":"token-risk","kind":"Pay-per-call API","summary":"Deterministic on-chain structural risk report for an ERC-20 token on Base. Keyless x402-native payment — no signup, no API key. Reports STRUCTURAL risk, not reputation: centralized","price":"$0.01 per call","min_usd":0.01,"rails":["x402"],"trust":54,"buyers":10,"settlements":17,"uptime":99.9,"remote":false,"shared_payout":false,"source":"x402-list.com","focus":"broad"}]}],"citations":[{"label":"x402-list.com on-chain measured settlements (CC BY 4.0), used for payment-verified trust and verified buyers","url":"https://x402-list.com"},{"label":"Official MCP Registry (CC0 1.0)","url":"https://registry.modelcontextprotocol.io"},{"label":"Agentropolis trust method hub-trust-v0.1","url":"https://agentropolis.io/api/v1/trust/method"}]}