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Delx Commerce — List Length Utility
x402
Delx Commerce — List Length Utility 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 length and a sample of an array, plus whether it is empty, for a given list of items.
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 with: 'ok' (boolean success flag), 'empty' (whether the list has zero items), 'length' (integer count of items), 'sample' (first few elements from the list), and 'schema' (a versioned schema identifier 'delx/util-list-len/v1').
Example use cases
Pre-processing array size check
“Before I send this batch of 50 product IDs to the next step, can you count how many are in the list and confirm it's not empty?”
Debugging empty API response
“I got back a list from the search API — can you tell me how long it is and whether it's empty, and show me the first few items?”
Validating user-submitted tag list
“A user submitted these tags: ["urgent", "billing", "refund"] — can you count them and give me a sample so I can verify the input looks right?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/list-len?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call way to count and inspect an array without setting up any account or subscription. It is ideal for agent pipelines that need to gate downstream steps on list size or emptiness, and when verifiable, on-chain payment via USDC (Base or Solana) is preferred over API-key billing.
Side effects
- Missing or non-array 'items' field returns an error response
- Empty or malformed JSON body may cause a 400-level error
- Payment failure via x402 protocol prevents execution
- Extremely large arrays may hit size limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | Input field: items. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"empty": false,
"length": 3,
"sample": [
"a",
"b",
"c"
],
"schema": "delx/util-list-len/v1"
}
}Tags
x402
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