SendCheck — EVM address verification (x402)

Connect Remote server

claude mcp add --transport http sendcheck https://api.pennyforge.org/mcp

{
  "mcpServers": {
    "sendcheck": {
      "url": "https://api.pennyforge.org/mcp"
    }
  }
}

{
  "servers": {
    "sendcheck": {
      "type": "http",
      "url": "https://api.pennyforge.org/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://api.pennyforge.org/mcp

Tools 3 found in our last check

• validate_address

  FREE pre-send check of an EVM address: EIP-55 checksum verification (catches typos, dropped characters, clipboard malware) + a note that a passing checksum is a spell-check, not payee verification. Run this before paying for check_address.

• check_address

  Paid pre-send verification of one EVM address on one chain ($0.01 USDC via x402, EIP-3009 on Base): checksum, wallet-vs-contract, outgoing activity, native/USDC/USDT balances, leveled verdict with reasons and next action. TWO-PHASE: call without x_payment first to get the exact…

• deep_scan

  Paid deep scan: the full verification across ALL FIVE chains (Base, Ethereum, Arbitrum, Optimism, Polygon) incl. wrong-network detection and USDC/USDT token-mismatch flags ($0.05 USDC via x402, EIP-3009 on Base). TWO-PHASE like check_address: first call returns the payment chall…

Details

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