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Delx Hex Canonicalize
x402
Delx Hex Canonicalize is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Validates and canonicalizes even-length hex strings, normalizing 0x prefix presence and confirming validity — stateless, local, no live chain RPC.
Price / call$0.003
Success—
StatusUnknown
How this service works
Canonicalize and validate even-length hex strings with optional 0x prefix — call when normalizing even-length hex for chain tooling. 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, w…
Output
Returns a deterministic JSON object indicating whether the hex string is valid (even-length, proper hex characters), the canonicalized hex string with or without 0x prefix per the caller's preference, and any normalization details.
Example use cases
Pre-flight calldata hex hygiene
“Before I send this calldata hex '4a7b3c9d2e' to my EVM contract, can you validate and canonicalize it with a 0x prefix so I know it's properly formatted?”
Normalize user-submitted hex input
“A user pasted this hex value 'abcd12' into my dapp form — can you validate it and return the canonical form without the 0x prefix?”
ABI encoding pipeline sanity check
“I'm building an encoding pipeline and need to make sure this hex string '0xdeadbeef' is even-length and valid before I pass it to the ABI encoder — can you confirm and canonicalize it?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/hex-canonicalizeWhen to prefer
Use this endpoint when you need lightweight, stateless, local hex validation and normalization without any live RPC call or chain state — ideal for input hygiene in EVM pipelines, ABI encoding prep, or any step where you want to confirm and standardize hex format cheaply before committing to an on-chain operation.
Side effects
- Odd-length hex strings return valid=false with an error explanation
- Non-hex characters in the input trigger a validation failure
- Malformed input (non-string type) may return a 400 error
- Empty string input results in valid=false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hex | string | Hex string with or without 0x; must be even-length for valid=true. |
| prefer_0x | boolean | When true, canonicalize with a 0x prefix. |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"schema": "delx/util-hex-canonicalize/v1",
"canonical": "0xabcd",
"byte_length": 2,
"input_length": 6
}
}Tags
x402
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