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Delx Commerce Hex Prefix Normalizer
x402
Delx Commerce Hex Prefix Normalizer is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Validates and normalizes a hexadecimal string, ensuring it has the correct prefix (0x or no prefix) and reports its length and validity.
Price / call$0.001
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 containing the normalized hex string, a validity boolean, the prefer_0x flag used, the even-length character count, and the schema identifier 'delx/util-hex-prefix/v1'.
Example use cases
Normalize hex before on-chain submission
“I have this raw hex value 'deadbeef' and I need it formatted with a 0x prefix before I submit it as calldata — can you validate and prefix it for me?”
Strip 0x prefix for byte encoding
“Take this hex string '0x1a2b3c' and give it back without the 0x prefix, and let me know if it's a valid even-length hex value.”
Validate hex string in smart contract pipeline
“Can you check whether '0xGG1234' is a valid hex string and whether it has the right prefix format?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/hex-prefix?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call utility to normalize or validate hex string prefixes without setting up an account or managing API keys — especially useful in automated agent pipelines dealing with blockchain addresses, calldata, or cryptographic hashes that require consistent 0x prefix formatting.
Side effects
- Invalid or non-hex characters in input string causing valid=false
- Malformed JSON request body returns 400 error
- Payment failure via x402 protocol returns 402 Payment Required
- Empty or missing hex field may return validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hex | string | Input field: hex. |
| prefer_0x | boolean | Input field: prefer 0x. |
Output
Schema · Response
{
"type": "json",
"example": {
"hex": "0x0abc",
"valid": false,
"schema": "delx/util-hex-prefix/v1",
"prefer_0x": true,
"even_length": 4
}
}Tags
x402
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