{"uid":"cap_rCL0LX95aCXXH5bG-MkIx","slug":"x402-toolbox-fibonacci-number-daa286e7","name":"x402-toolbox Fibonacci Number","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/math/fibonacci-number?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_tkzAT4M8VlLMIWyf4U7R4","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":"Returns the Nth Fibonacci number as a deterministic pay-per-call computation over x402 with USDC micropayment.","exampleAgentPrompt":"What is the Fibonacci number at position 42? Use the x402-toolbox math endpoint and pay the micropayment in USDC.","exampleUseCases":[{"title":"Fibonacci index lookup for algorithm","prompt":"I need to know the exact Fibonacci number at position 78 for a coding problem I'm working on — can you look it up?"},{"title":"Math tutoring Fibonacci verification","prompt":"My student claims the 20th Fibonacci number is 6765 — can you verify that by computing fib(20) from the toolbox?"},{"title":"Agent pipeline numeric seed generation","prompt":"Generate the Fibonacci number at index 13 so I can use it as a deterministic seed value in my workflow."}],"resultDescription":"A JSON object with 'ok' (boolean, true on success) and 'paid' (boolean, confirming USDC micropayment was processed), along with the computed Fibonacci number at the requested index.","failureModes":["Missing or invalid index parameter returns an error response","Non-integer or negative index may produce undefined behavior or error","Payment failure (insufficient USDC balance) results in 402 response and no computation","Network timeout on Cloudflare Worker edge node"],"whenToPreferThis":"Choose this endpoint when you need a trustless, no-signup, pay-per-call Fibonacci computation billed in USDC micropayments via x402 — ideal for AI agents that cannot hold API keys but can authorize crypto micropayments, or when auditability of payment-as-identity is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:48:57.727Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-fibonacci-number-daa286e7"}