PayGuard
Free tier: 30 calls/day, then $0.001 per call in USDC (x402, on Base, Polygon, Arbitrum One or Solana). Full OFAC SDN results on every free call. Check whether a crypto address (EVM, BTC, TRX, SOL, LTC, XMR and more) is on the US Treasury OFAC SDN sanctions list before your agent pays it. Free preview tools are free; paid tools charge per call in USDC over x402 (Base, Polygon, Arbitrum or Solana) directly to the publisher. MCPize does not bill for this server.
crypto
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|Free tier: 30 calls/day, then $0.001 per call in USDC (x402, on Base, Polygon, Arbitrum One or Solana). Full OFAC SDN results on every free call. Endpoint: https://api.youraitools.co/payguard/mcp