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Delx Object Size
x402
Delx Object Size is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Counts the number of top-level keys in a JSON object and returns that count as an integer
Price / call$0.001
Success—
StatusUnknown
How this service works
Count object keys. Call when you size agent payloads before paying. Returns size integer for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
Output
Returns a single integer representing the number of top-level keys in the submitted JSON object. The result is advisory and does not reflect nested depth or total byte size.
Example use cases
Pre-payment payload size check
“Before I submit this agent payload for processing, can you tell me how many keys it has so I know if it's within the budget limit? Here's the object: {"user_id": "u123", "action": "purchase", "amount": 50, "currency": "USD", "timestamp": "2024-01-15"}.”
Dynamic form field count
“I'm generating a form from a config object and need to know how many fields it defines before rendering. Count the keys in this object: {"firstName": "", "lastName": "", "email": "", "phone": "", "address": "", "city": "", "zip": ""}.”
Agent response complexity guard
“My agent just built a response payload and I want to make sure it's not too bloated — can you count how many top-level keys are in this object before I pass it downstream? {"summary": "done", "status": "ok", "errors": [], "metadata": {}, "result": null}.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/obj-sizeWhen to prefer
Use this endpoint when you need a fast, cheap, local count of top-level keys in a JSON object — especially before making budgeting decisions about downstream API calls or payload processing. Prefer it over writing inline code when you want a stateless, auditable utility call that doesn't retain data. Not suitable if you need recursive/deep key counts or byte-size measurements.
Side effects
- Non-object input (array, string, number) may return an error or unexpected result
- Empty object returns 0
- Deeply nested objects only count top-level keys — callers expecting total field counts may be surprised
- Payment failure via x402 if USDC balance is insufficient
- Malformed JSON in request body causes a parsing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| object | object | Input field: object. |
Output
Schema · Response
{
"type": "json",
"example": {
"size": 2,
"schema": "delx/util-obj-size/v1"
}
}Tags
x402
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