{"uid":"cap_CVW_PwVL9lR_OMIM1FnVr","slug":"24k-labs-regex-explainer-245f1df3","name":"24K Labs Regex Explainer","description":"Explain what a regular expression matches, in plain English, token by token.","url":"https://api.24klabs.ai/api/v1/explain-regex","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"regex":{"type":"string"}}},"responseSchema":{"type":"json","example":{"explanation":"..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OaSaStnT9TtNZ-zFa_kQG","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Takes a regular expression and returns a plain-English, token-by-token explanation of what it matches.","exampleAgentPrompt":"Can you explain what this regex does, token by token: ^(?:[0-9]{1,3}\\.){3}[0-9]{1,3}$?","exampleUseCases":[{"title":"Debug an unfamiliar regex pattern","prompt":"I inherited this codebase and found this regex: ^([01]?[0-9]|2[0-3]):[0-5][0-9]$ — can you explain each part of it in plain English so I understand what it's supposed to match?"},{"title":"Learn regex while building a validator","prompt":"I'm writing a password validation regex and I want to understand what this pattern does before I use it: ^(?=.*[A-Z])(?=.*\\d)(?=.*[@$!%*?&])[A-Za-z\\d@$!%*?&]{8,}$ — can you walk me through it token by token?"},{"title":"Document regex in a codebase","prompt":"Help me write a comment explaining this URL regex so my teammates understand it: https?:\\/\\/(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b([-a-zA-Z0-9()@:%_\\+.~#?&\\/\\/=]*)"}],"resultDescription":"A plain-English breakdown of the regular expression, explained token by token — describing what each component (character class, quantifier, anchor, group, etc.) matches in human-readable terms.","failureModes":["Invalid or malformed regex syntax returns an error","Extremely complex or pathological regexes may produce incomplete explanations","Missing or empty regex input returns a 400 error","Catastrophically backtracking regexes may time out"],"whenToPreferThis":"Choose this endpoint when you need to explain, document, or teach what a regular expression does in plain English — especially useful for developer tools, code review assistants, onboarding documentation, or when a user pastes an unfamiliar regex and wants to understand it without being a regex expert.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:32:06.301Z","isFirstParty":false}