{"uid":"cap__Gdhtz9NpwogOZrJVcaab","slug":"api-x402node-dev-63f01f88","name":"Password Entropy Calculator","description":"Password entropy calculator, Shannon entropy, bits of randomness, charset size, mathematical password strength metric for security audits. Accepts payment on Base or Solana — either network works.","url":"https://api.x402node.dev/password/entropy","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"password":{"type":"string","description":"Password (optional)"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0022","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":"$0.0022/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0022","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0022","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ysGL0vEPbJ59n0sHmY5Ui","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0022","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates Shannon entropy, bits of randomness, and character set size for a given password to produce a mathematical password strength metric.","exampleAgentPrompt":"What's the Shannon entropy and bits of randomness for the password 'Tr0ub4dor&3'? I need the charset size and entropy score for a security audit.","exampleUseCases":null,"resultDescription":"Returns Shannon entropy value in bits, total bits of randomness, character set size used in the password, and an overall mathematical password strength metric suitable for security audits.","failureModes":["Empty password string returns error or zero entropy","Extremely long passwords may be truncated or rejected","Missing or malformed request body returns 400 error","Payment failure (402) if USDC balance insufficient"],"whenToPreferThis":"Use this endpoint when you need a precise, mathematical entropy-based strength measurement for passwords rather than a heuristic score. Ideal for security audits, compliance checks, or any workflow requiring quantitative password randomness analysis without relying on pattern-matching libraries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:57:05.189Z","isFirstParty":false}