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Delx Commerce — Is Leap Year
x402
Delx Commerce — Is Leap Year 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).
Determines whether a given Gregorian calendar year is a leap year, returning a boolean result for a small per-call USDC micropayment.
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 containing the queried year, a boolean field `is_leap_year` indicating whether it is a leap year, and a schema version string (e.g. `delx/is-leap-year/v1`).
Example use cases
February 29 event scheduling
“I'm planning an event for February 29th, 2028 — can you confirm that 2028 is actually a leap year so that date exists?”
Historical date validation
“I need to check whether 1900 was a leap year — I'm debugging a date calculation in some legacy code and the result is unexpected.”
Countdown app calendar logic
“Is 2100 a leap year? I'm building a countdown timer and need to know if I should account for 366 days that year.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/is-leap-year?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, trustless, pay-per-call leap year check with verifiable delivery over USDC on Base or Solana — ideal for AI agents that need calendar correctness without managing an API key or subscription, and where a single authoritative yes/no answer is sufficient.
Side effects
- Year out of range (below 1 or above 9999) returns a validation error
- Non-integer or missing year field returns a 400 bad request
- Payment failure or insufficient USDC balance blocks the call via x402 protocol
- Network timeout returns no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| year | integer | Gregorian calendar year. |
Output
Schema · Response
{
"type": "json",
"example": {
"year": 2028,
"schema": "delx/is-leap-year/v1",
"is_leap_year": true
}
}Tags
x402
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