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Delx EVM Chain ID Hex Normalize
x402
Delx EVM Chain ID Hex Normalize is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Converts an EVM chain ID (in any numeric or hex form) to its canonical hex and decimal representations, verifying correctness in memory without data retention.
Price / call$0.001
Success—
StatusUnknown
How this service works
EVM Chain Id Hex Normalize: EVM Chain Id Hex Normalize converts decimal or hexadecimal chain identifiers into both forms from bounded caller-supplied values without an external provider. Call EVM Chain Id Hex Normalize before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Chain Id Hex Normalize as versioned deterministic…
Output
Returns a JSON object containing the normalized hex string (0x-prefixed) and decimal integer for the supplied chain ID, along with operation name, pass/fail status, and an evidence block confirming no data was retained and no external calls were made (includes SHA256 of the input).
Example use cases
Pre-flight check for EVM transaction
“Before I submit this transaction, can you normalize chain ID 137 into its proper hex format so I know I'm targeting Polygon correctly?”
Standardize chain ID for multi-chain agent
“I'm building a workflow that hits Arbitrum — can you convert chain ID 42161 to the canonical 0x-prefixed hex so my agent uses the right format?”
Validate chain ID from user input
“A user just gave me '0xa4b1' as a chain ID — can you run it through your EVM chain ID normalizer to confirm the hex and decimal values are correct?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/evm-chain-id-hex-normalizeWhen to prefer
Use this endpoint when an AI agent needs to deterministically normalize or validate an EVM chain ID into its canonical hex and decimal forms — especially during EVM preflight checks before sending transactions or constructing payloads. Prefer it over ad-hoc string formatting when auditability matters, since the response includes an evidence block with input hash and zero-retention confirmation.
Side effects
- Invalid or unparseable chain_id value returns an error status
- chain_id exceeding 8192 characters is rejected
- Malformed hex strings that cannot be parsed to an integer fail validation
- Missing chain_id field in request body causes a bad request response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain_id | string | Chain Id supplied to EVM Chain Id Hex Normalize; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"hex": "0x2105",
"decimal": 8453
},
"schema": "delx/util-evm-chain-id-hex-normalize/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "be323df1e1cdb84b28aeaec9e86e6786c27277b63126d7361e444f5d6fce0979",
"external_calls": 0
},
"operation": "evm_preflight:evm_chain_id_hex_normalize"
}
}Tags
x402
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