Wallet Checksum

$0.001

Convert an Ethereum address to its EIP-55 checksummed form. SIWE messages require the checksummed address on line 2 before signing.

POST https://x402.freeq.one/tools/wallet_checksum

Request body

JSON

{
  "items": [
    {
      "proof": {
        "merkleTreeDepth": 20,
        "merkleTreeRoot": "0x...",
        "nullifier": "0x...",
        "message": "0x...",
        "scope": "0x...",
        "points": ["0x...", "0x...", "0x...", "0x...", "0x...", "0x...", "0x...", "0x..."]
      }
    }
  ]
}

Try it (x402 payment flow)

curl -X POST https://x402.freeq.one/tools/wallet_checksum \ -H "Content-Type: application/json" \ -d '{"items":[{"proof":{"merkleTreeDepth":20,"merkleTreeRoot":"0x1","nullifier":"0x1","message":"0x1","scope":"0x1","points":["0x1","0x1","0x1","0x1","0x1","0x1","0x1","0x1"]}}]}'

Without payment, the server returns 402 Payment Required with x402 challenge details. A paying agent signs a USDC transaction on Base and retries with the payment header.

Response example

JSON

{
  "results": [
    { "valid": true, "method": "semaphore-official-vkey" },
    { "valid": true, "method": "semaphore-official-vkey" },
    { "valid": true, "method": "semaphore-official-vkey" }
  ],
  "count": 3,
  "duration_ms": 67,
  "avg_ms": 22.33
}

Call via x402 → Service card OpenAPI spec All APIs