{"uid":"cap_ite2gpW0mA65rwXLgXZOT","slug":"x402-toolbox-leap-year-check-19e3b87e","name":"x402-toolbox Leap Year Check","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/time/leap-year-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qJL9QbnhkxdMq_ktyEA9j","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given year is a leap year, returning a boolean result via a pay-per-call API over x402.","exampleAgentPrompt":"Is 2100 a leap year? Use the leap year check tool to give me a definitive yes or no.","exampleUseCases":[{"title":"Calendar app date validation","prompt":"I'm building a calendar feature — can you check if 2096 is a leap year so I know whether to show February 29th that year?"},{"title":"Historical date research","prompt":"Was 1900 a leap year? I want to know if February 29th existed in 1900 for a historical event I'm researching."},{"title":"Birthday edge case check","prompt":"My friend was born on February 29, 2000 — can you confirm 2000 was actually a leap year so I can set up their birthday reminder correctly?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean indicating success and a 'paid' boolean confirming the x402 micropayment was processed, along with the leap year determination result for the queried year.","failureModes":["Missing or invalid year input returns an error or unexpected result","Non-numeric schema parameter may cause malformed query","x402 payment failure prevents access to the result","Ambiguous or out-of-range year values may yield unexpected behavior"],"whenToPreferThis":"Choose this endpoint when you need a quick, deterministic, no-signup computation for leap year status and are already operating in an x402 micropayment environment. Ideal for AI agents that need calendar logic without managing API keys or subscriptions — the $0.001 USDC payment serves as authentication.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:47:30.739Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-leap-year-check-19e3b87e"}