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Delx Commerce — EVM Block Age Check
x402
Delx Commerce — EVM Block Age Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Validates whether an EVM block timestamp is within a specified maximum age threshold, returning freshness status and age in seconds.
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 indicating whether the block is fresh (boolean), the computed age in seconds, a pass/fail status, and a verifiable evidence object including an input SHA-256 hash and confirmation that no data was retained and no external calls were made.
Example use cases
DeFi transaction preflight freshness gate
“Before I submit this swap, check if the block with timestamp 1717200000 is still fresh — current time is 1717200060 and I need it to be no older than 120 seconds.”
Smart contract block recency guard
“I'm about to call a smart contract that requires a recent block. Verify that the block timestamped 1717195000 is within 600 seconds of now (epoch 1717195500).”
On-chain oracle data staleness check
“Can you confirm whether the oracle block from timestamp 1717190000 is still valid given the current time is 1717190400 and my maximum tolerated age is 300 seconds?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/evm-block-age-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a verifiable, pay-per-call, tamper-evident check of EVM block freshness before executing on-chain operations — especially when auditability (via input hash and no-retention guarantee) matters more than running the calculation locally.
Side effects
- Missing required fields (now_epoch, block_timestamp, maximum_age_seconds) result in a validation error
- block_timestamp in the future relative to now_epoch may produce unexpected or negative age values
- Non-integer epoch values cause schema rejection
- Payment failure via x402 protocol blocks request execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to EVM Block Age Check; used only for this bounded calculation and processed in memory without retention. |
| block_timestamp | integer | Block Timestamp supplied to EVM Block Age Check; used only for this bounded calculation and processed in memory without retention. |
| maximum_age_seconds | integer | Maximum Age Seconds supplied to EVM Block Age Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"fresh": true,
"age_seconds": 60
},
"schema": "delx/util-evm-block-age-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "35299ebdd9f3624ff763f9691ae29cecba1e988b07fb01f7a1f8cc466fa8a964",
"external_calls": 0
},
"operation": "evm_preflight:evm_block_age_check"
}
}Tags
x402
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