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Delx Address Checksum EVM
x402
Delx Address Checksum EVM is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Produces or validates an EIP-55 checksummed EVM address locally and deterministically, with no network calls or live chain data.
Price / call$0.003
Success—
StatusUnknown
How this service works
Produce or validate an EIP-55 checksummed EVM address without network calls — call when producing or checking EIP-55 checksum addresses. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain ti…
Output
Returns a deterministic JSON object containing the EIP-55 checksummed form of the input EVM address and a validation status indicating whether the original input already matched the correct checksum.
Example use cases
Pre-submission address hygiene
“Before I send this transaction, can you checksum validate 0xab5801a7d398351b8be11c439e05c5b3259aec9b to make sure it's properly EIP-55 formatted?”
Normalize raw hex from user input
“A user just pasted this address in all lowercase: d3cda913deb6f0967b57ab6e59b1c17802c2e76a — can you give me back the properly checksummed EIP-55 version so I can store it correctly?”
Smart contract address validation
“I have this smart contract address 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 — verify it already has the correct EIP-55 checksum and tell me if it passes.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/address-checksum-evmWhen to prefer
Choose this endpoint when you need fast, cheap, stateless EIP-55 address formatting or validation with no RPC dependency — ideal for input sanitization pipelines, smart contract address normalization, and pre-transaction hygiene checks where live chain data is unnecessary. Prefer this over on-chain or RPC-based address tools when you want zero latency, no external API rate limits, and deterministic output for a fixed $0.003 per call.
Side effects
- Invalid address format — non-hex characters or wrong length returns an error
- Address not 40 hex chars after stripping 0x prefix causes rejection
- Completely missing address field returns a schema validation error
- Malformed JSON input body causes a 400 bad request
- Payment not included or insufficient USDC via x402 returns a 402 response
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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