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Delx Commerce — Array First Element Extraction
x402
Delx Commerce — Array First Element Extraction 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).
Returns the first element of an input array, with a flag indicating whether the array was non-empty, payable per-call via USDC on Base or Solana.
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
A JSON object with an `empty` boolean indicating whether the input array had any elements, a `value` field containing the first element of the array (if non-empty), and a `schema` field identifying the response format as `delx/util-arr-first/v1`.
Example use cases
Head-of-queue task retrieval
“I have a queue of pending tasks represented as an array — grab the first one so I know what to work on next, and let me know if the queue is empty.”
First search result extraction
“I ran a search and got back a list of results like ["result-A", "result-B", "result-C"] — pull out the very first result for me.”
Default value selection from list
“I have a list of fallback options ["option1", "option2", "option3"] — fetch the first one as the default choice and confirm the list isn't empty.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/arr-first?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a simple, trustless, pay-per-call utility to extract the first element of an array without standing up your own infrastructure. It is ideal for AI agents that need lightweight array-head operations within a verifiable, blockchain-settled micropayment workflow (x402 on Base or Solana), especially when avoiding API key management or subscription overhead is a priority.
Side effects
- Empty input — if items array is missing or null, behavior is undefined; check the `empty` flag in the response
- Non-array input — passing a non-array type to items may result in an error or unexpected output
- Payment failure — if USDC payment via x402 is not completed, the API returns a 402 status and no result is delivered
- Malformed request — missing or invalid JSON body returns a 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | Input field: items. |
Output
Schema · Response
{
"type": "json",
"example": {
"empty": false,
"value": "alpha",
"schema": "delx/util-arr-first/v1"
}
}Tags
x402
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