{"uid":"cap_S2L11-NHthijlL43r9VS5","slug":"vextorium-password-strength-estimator-zxcvbn-1eaffc46","name":"Vextorium Password Strength Estimator (zxcvbn)","description":"Estimate password strength with Dropbox's zxcvbn: score 0-4, estimated guesses and crack time for online and offline attacks, weak patterns found (dictionary, dates, sequences...) and tips. Evaluated in memory, never stored or logged.","url":"https://api.vextorium.com/fuerza-contrasena-pago?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"contrasena":{"type":"string"}}},"responseSchema":{"type":"json","example":{"nota":"La contraseña se analiza en memoria y no se almacena. Mejor aún: evalúala en local y no la envíes a ningún servicio.","aviso":"This is a very common password.","nivel":"muy débil","consejos":["Add another word or two. Uncommon words are better."],"longitud":11,"puntuacion":0,"patrones_debiles":["dictionary"],"tiempo_descifrado":{"online":"60 seconds","online_limitado":"6 hours","offline_hash_lento":"less than a second","offline_hash_rapido":"less than a second"},"intentos_estimados":"596"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GNK-nuhZM4NQT44gNB9R1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Estimates password strength using Dropbox's zxcvbn algorithm, returning a score 0–4, crack time estimates for online/offline attacks, weak patterns detected, and improvement tips — evaluated in memory, never stored.","exampleAgentPrompt":"How strong is the password 'Sunfl0wer2024!'? Give me the zxcvbn score, estimated crack time for online and offline attacks, any weak patterns found, and suggestions to make it stronger.","exampleUseCases":[{"title":"Pre-registration password gate","prompt":"Before I let a new user finish signing up, check whether their password 'dragon123' is strong enough — give me the score out of 4, how long it'd take to crack offline, and any weak patterns so I can show them a helpful error message."},{"title":"Security audit of existing passwords","prompt":"Can you evaluate the strength of the password 'P@ssw0rd!' using zxcvbn? I need the numeric score, the human-readable strength level, estimated guesses, and any improvement tips."},{"title":"Developer password policy testing","prompt":"I'm building a signup form and want to test how zxcvbn rates the password 'correct-horse-battery-staple' — what score does it get, what crack times does it estimate for fast and slow offline attacks, and does it flag any weak patterns?"}],"resultDescription":"Returns a JSON object with: a numeric score (0–4), a human-readable strength level (e.g. 'muy débil'), estimated number of guesses, crack times for four attack scenarios (online unlimited, online rate-limited, slow offline hash, fast offline hash), an array of detected weak pattern types (e.g. 'dictionary', 'date', 'sequence'), an array of improvement tips, an optional warning message, and a privacy note confirming the password is never stored.","failureModes":["Missing 'contrasena' field in request body returns validation error","Empty or null password string may return a score of 0 with no patterns","Network timeout if the service is temporarily unavailable","Invalid bodyType value causes request rejection"],"whenToPreferThis":"Choose this endpoint when you need a fast, privacy-respecting, in-memory password strength analysis powered by Dropbox's well-established zxcvbn algorithm, especially when you want structured crack-time estimates across multiple attack scenarios and actionable tips — without risk of the password being logged or stored server-side.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:57:01.107Z","isFirstParty":false,"canonicalSlug":"vextorium-password-strength-estimator-zxcvbn-1eaffc46"}