{"uid":"cap_WGMeQKPLMwU1UK3RUwlPk","slug":"vextorium-password-strength-estimator-6ac8140a","name":"Vextorium Password Strength Estimator","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/v1/password-strength?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"required":["password"],"properties":{"password":{"type":"string"}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":["object","null"],"properties":{"note":{"type":["string","null"]},"tips":{"type":["array","null"],"items":{"type":["null","string"]}},"level":{"type":["string","null"]},"score":{"type":["number","null"]},"length":{"type":["number","null"]},"notice":{"type":["string","null"]},"time_to_crack":{"type":["object","null"],"properties":{"online":{"type":["string","null"]},"limited_online":{"type":["string","null"]},"fast_offline_hash":{"type":["string","null"]},"slow_offline_hash":{"type":["string","null"]}}},"weak_patterns":{"type":["array","null"],"items":{"type":["null","string"]}},"estimated_attempts":{"type":["string","null"]}}}}}}},"responseSchema":{"type":"json","example":{"note":"The password is analyzed in memory and not stored. Better still: evaluate it locally and do not send it to any service.","tips":["Add another word or two. Uncommon words are better."],"level":"very weak","score":0,"length":11,"notice":"This is a very common password.","time_to_crack":{"online":"60 seconds","limited_online":"6 hours","fast_offline_hash":"less than a second","slow_offline_hash":"less than a second"},"weak_patterns":["dictionary"],"estimated_attempts":"596"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_1yu4nmp8SjMUlRNt35SON","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":null,"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 multiple attack scenarios, detected weak patterns, and improvement tips — evaluated in memory, never stored.","exampleAgentPrompt":"How strong is the password 'Tr0ub4dor&3'? Give me the zxcvbn score, crack time estimates for online and offline attacks, any weak patterns found, and tips to improve it.","exampleUseCases":[{"title":"Password policy enforcement for signups","prompt":"Before I let this user register, check if their chosen password 'sunshine2024!' is strong enough — give me the score, level, weak patterns, and crack time estimates so I can decide whether to block it."},{"title":"Security audit of stored passwords","prompt":"I'm reviewing password quality for our accounts. Can you score this password 'P@ssw0rd' using zxcvbn and tell me what patterns make it weak and how long it would realistically take to crack offline?"},{"title":"Helping a user create a better password","prompt":"My user wants to set their password to 'iloveyou123' — tell them the strength score, why it's weak, how quickly it could be cracked, and what they should change to make it stronger."}],"resultDescription":"A JSON object containing: a numeric score from 0 (very weak) to 4 (very strong), a human-readable level label (e.g. 'very weak'), estimated number of guesses to crack, crack time estimates across four scenarios (online throttled, online unthrottled, fast offline hash, slow offline hash), a list of detected weak patterns (e.g. dictionary, dates, sequences), improvement tips, the password's length, and a privacy notice confirming it was analyzed in memory and not stored.","failureModes":["Missing required 'password' field returns a validation error","Empty string password may return a minimal/zero score result","Extremely long passwords may be truncated or cause unexpected behavior","Network timeout if the service is temporarily unavailable","Invalid bodyType enum value causes request rejection"],"whenToPreferThis":"Choose this endpoint when you need a detailed, multi-dimensional password strength assessment beyond simple length or regex checks — especially when you want crack time estimates across realistic attack scenarios, weak pattern detection (dictionary words, dates, keyboard sequences), and actionable user-facing tips. It is ideal for signup flows, security audits, or user-facing password feedback. It uses the well-established zxcvbn algorithm with a privacy guarantee that the password is never stored.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:46:25.124Z","isFirstParty":false,"canonicalSlug":"vextorium-password-strength-estimator-6ac8140a"}