Validate & checksum an address API

Validate an EVM address and return its EIP-55 mixed-case checksum form. Catches typos/bad addresses before an agent sends funds.

Price$0.01per request

MethodPOST

Route/v1/evm/checksum-address

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

evmaddresschecksumeip55validate

API URLhttps://x402.hexl.dev/v1/evm/checksum-address

Integration docs

Example request

{
  "address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045"
}

Example response

{
  "input": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
  "valid": true,
  "checksum": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}

Input schema

{
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "address": {
      "type": "string"
    }
  }
}

Output schema

{
  "type": "object",
  "required": [
    "input",
    "valid",
    "checksum"
  ],
  "properties": {
    "input": {
      "type": "string"
    },
    "valid": {
      "type": "boolean"
    },
    "checksum": {
      "type": [
        "string",
        "null"
      ]
    }
  }
}