{"uid":"cap_aYkzLMN_bIzvZ9HmLD_Ke","slug":"vextorium-keyword-keyphrase-extractor-7f720f26","name":"Vextorium Keyword & Keyphrase Extractor","description":"558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.","url":"https://api.vextorium.com/v1/keywords?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string"},"limit":{"type":"integer"}}},"responseSchema":{"type":"json","example":{"language":"en","key_sentences":[{"score":9,"times":1,"sentence":"business model viable"},{"score":8,"times":1,"sentence":"usdc micropayments make"}],"frequent_words":[{"word":"agents","times":3},{"word":"micropayments","times":2}]}},"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_aUyUeBGz177UzSubSkgEJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extracts keywords, keyphrases, and frequent words from text using the RAKE algorithm (no AI), supporting English and Spanish, for tagging, indexing, and SEO.","exampleAgentPrompt":"Extract the top 10 keywords and keyphrases from this blog post text using RAKE scoring, in English: 'Micropayments using USDC are transforming how AI agents pay for services, making it easier than ever to build viable business models without traditional payment rails.'","exampleUseCases":[{"title":"SEO tagging for blog content","prompt":"Pull the top keyphrases and most frequent words from this article so I can use them as SEO tags: 'Decentralized finance is reshaping how individuals and institutions manage assets, offering yield opportunities without traditional intermediaries.'"},{"title":"Auto-indexing Spanish documents","prompt":"I have a Spanish product description I need to index — extract the main keywords and keyphrases from it: 'Los pagos digitales permiten a los usuarios transferir dinero de forma rápida y segura sin necesidad de un banco.'"},{"title":"Topic identification in customer reviews","prompt":"Find the key topics and most-repeated words in this customer review so I can categorize it: 'The onboarding process was confusing and slow, but once set up, the dashboard was intuitive and the reports were very detailed and useful.'"}],"resultDescription":"Returns the detected language, an array of scored keyphrases (each with a RAKE score, occurrence count, and the phrase text), and an array of the most frequent individual words with their counts.","failureModes":["Missing or empty 'text' field returns a validation error","Very short texts may yield no meaningful keyphrases","Unsupported language input may produce low-quality or empty keyphrase results","Exceeding rate limits or payment failure returns HTTP 402 or 429"],"whenToPreferThis":"Choose this endpoint when you need fast, deterministic, non-AI keyword extraction using the RAKE algorithm — ideal for high-volume tagging, SEO enrichment, or content indexing pipelines where AI overhead is unnecessary, and when you need Spanish or English support with scoring based on word frequency and co-occurrence.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:38:12.887Z","isFirstParty":false,"canonicalSlug":"vextorium-keyword-keyphrase-extractor-c47a9c3f"}