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Delx Commerce — EVM Address Checksum Validator
x402
Delx Commerce — EVM Address Checksum Validator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Validates and returns the ERC-55 keccak256 checksummed (mixed-case) version of an EVM address, confirming validity and whether it matches the input.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object with: a boolean `valid` indicating if the address is a well-formed EVM address, the `checksum_address` in ERC-55 mixed-case format, the `algorithm` used (keccak256), a `matches_input` boolean indicating whether the input already matched the checksum, and a `schema` identifier string.
Example use cases
Wallet address normalization before transfer
“Before I send funds, can you checksum-validate this EVM address and give me the canonical mixed-case version: 0xab5801a7d398351b8be11c439e05c5b3259aec9b?”
Smart contract address verification
“I have this contract address I pulled from a forum — 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you confirm it's a valid EVM address and give me the properly checksummed form?”
User-submitted address sanity check
“A user just submitted the address 0x4838b106fce9647bdf1e7877bf73ce8b0bad5f97 in our app — can you verify it's a valid Ethereum address and return the correct ERC-55 checksum version?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/address-checksum-evm?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, pay-per-call (no signup, no API key) ERC-55 checksum validation for EVM addresses, especially in agent pipelines that already use the x402 micropayment protocol. Ideal for lightweight, one-off address normalization without managing API credentials.
Side effects
- Invalid or malformed hex string returns valid:false
- Address shorter or longer than 40 hex characters fails validation
- Non-hex characters in address cause rejection
- Payment failure via x402 results in 402 response before processing
- Network timeout if Base or Solana payment rail is congested
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | EVM address (40 hex chars, optional 0x). |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"schema": "delx/util-address-checksum-evm/v1",
"algorithm": "keccak256",
"matches_input": true,
"checksum_address": "0x95222290DD7278Aa3Ddd389Cc1E1d165CC4BAfe5"
}
}Tags
x402
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