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Delx Commerce — Base Gas Price Staleness Check
x402
Delx Commerce — Base Gas Price Staleness Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Checks whether a previously quoted Base network gas price is still fresh (within a maximum age threshold) given two epoch timestamps and a staleness limit.
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 gas price quote is fresh (boolean), how many seconds old it is (age_seconds), a pass/fail status, and an evidence block confirming no data was retained and no external calls were made — suitable for EVM preflight decision-making.
Example use cases
Pre-transaction gas price validation
“I have a gas price quoted at epoch 1717200000 and it's now epoch 1717200090 — check if it's still fresh given a maximum acceptable age of 120 seconds before I send my Base transaction.”
Agent EVM preflight safety check
“My agent quoted gas prices at epoch 1717199800 and the current time is epoch 1717200000 — is that quote still within the 180-second freshness window I need before executing on Base?”
Stale gas detection in DeFi workflow
“I'm running an automated swap on Base and my gas price was fetched at epoch 1717200500; it's now epoch 1717200800 — tell me if it's stale given my 250-second maximum age limit.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/base-gas-price-staleness?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated DeFi workflow needs a lightweight, verifiable, privacy-preserving staleness check on a Base network gas price quote before committing to a transaction — particularly when no external oracle call is needed and the calculation must be auditable with a retained=false evidence trail.
Side effects
- Missing required fields (now_epoch, quoted_at_epoch, or maximum_age_seconds) result in a validation error
- Negative age (now_epoch earlier than quoted_at_epoch) may produce unexpected results
- Payment failure via x402 protocol prevents call from completing
- Malformed integer types in input fields cause schema rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| now_epoch | integer | Now Epoch supplied to Base Gas Price Staleness; used only for this bounded calculation and processed in memory without retention. |
| quoted_at_epoch | integer | Quoted At Epoch supplied to Base Gas Price Staleness; used only for this bounded calculation and processed in memory without retention. |
| maximum_age_seconds | integer | Maximum Age Seconds supplied to Base Gas Price Staleness; 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-base-gas-price-staleness/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "71423649bb9f78764df45bb5a8b4de2c13085d598094d66b005c77f6181eac9f",
"external_calls": 0
},
"operation": "evm_preflight:base_gas_price_staleness"
}
}Tags
x402
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