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Delx EIP-55 Checksum Verifier
x402
Delx EIP-55 Checksum Verifier 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).
Checks whether a given EVM address already matches its EIP-55 mixed-case checksum form, returning a deterministic boolean result without any live RPC call
Price / call$0.003
Success—
StatusUnknown
How this service works
Check whether an address already matches its EIP-55 checksum form — call when verifying an address already matches EIP-55 form. 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 tip, web se…
Output
A deterministic JSON response indicating whether the provided EVM address already matches its EIP-55 mixed-case checksum encoding — no live chain data, purely local computation. The response is machine-readable and suitable for use as a boolean gate in pipelines.
Example use cases
Pre-submission address hygiene check
“Before I submit this transfer, verify that the destination address 0xAbCdEf0123456789AbCdEf0123456789AbCdEf01 is already correctly checksummed in EIP-55 format.”
Wallet input validation in a dApp pipeline
“I have a user-entered address 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you confirm whether it already matches its EIP-55 checksum so I know if I need to re-encode it?”
Batch pipeline quality gate for address lists
“I'm processing a list of EVM addresses and need to flag any that aren't already in EIP-55 form — start by checking 0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed for me.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/eip55-checkWhen to prefer
Choose this endpoint when you need a fast, stateless, offline EIP-55 checksum verification with no RPC dependency, no rate limits from a node provider, and no side effects. It is ideal for input hygiene pipelines, smart contract address validation, and pre-flight checks where you only need to know if the address is already correctly checksummed — not to convert or correct it.
Side effects
- Invalid or malformed address string (wrong length, non-hex characters) — likely returns an error or validation failure JSON
- Missing required address field — returns a schema validation error
- Address with incorrect length (not 40 hex chars) — rejected before checksum logic runs
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-eip55-check/v1",
"expected": "0x95222290DD7278Aa3Ddd389Cc1E1d165CC4BAfe5",
"algorithm": "keccak256",
"is_checksummed": true
}
}Tags
x402
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