{"uid":"cap_n-VO32J74uIENoZkVzv3E","slug":"x402-toolbox-palindrome-check-135c50c3","name":"x402-toolbox Palindrome 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/text/palindrome-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_OktDPeDE53H-pfEOr0QeU","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 string is a palindrome (reads the same forwards and backwards)","exampleAgentPrompt":"Can you check if the word 'racecar' is a palindrome?","exampleUseCases":[{"title":"Word game palindrome verification","prompt":"Is the word 'level' a palindrome? I need to confirm before using it in my word puzzle."},{"title":"Phrase palindrome detection","prompt":"Check if the phrase 'A man a plan a canal Panama' is a palindrome — ignoring spaces."},{"title":"Automated content filter validation","prompt":"I have a list of user-submitted words and I need to know which ones are palindromes — start by checking 'madam'."}],"resultDescription":"Returns a JSON object with an 'ok' boolean indicating request success, a 'paid' boolean confirming payment, and a result indicating whether the supplied string is a palindrome.","failureModes":["Missing or empty string input returns an error or ambiguous result","Payment failure over x402 (insufficient USDC balance or Base network issue) blocks the call","Non-string or malformed schema parameter may yield unexpected behavior","Case sensitivity handling may affect palindrome result if not normalized by the service"],"whenToPreferThis":"Choose this endpoint when you need a cheap, deterministic, zero-signup palindrome check payable per-call via USDC on Base — ideal for AI agents that need string validation without managing API keys or subscriptions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:41:47.358Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-palindrome-check-135c50c3"}