{"uid":"cap_uf70FHtWbaShK1wzhUCgh","slug":"fastapi-online-keyword-extraction-1500505b","name":"fastapi.online Keyword Extraction","description":"Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.","url":"https://api.fastapi.online/keywords","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","maxLength":8000,"minLength":1},"max_keywords":{"type":"integer","maximum":20,"minimum":1}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1CnS33fVDCimFV1lcfakA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extracts the most relevant keywords from a given text, optionally limiting the number returned","exampleAgentPrompt":"Extract the top 5 keywords from this article text: 'Artificial intelligence is transforming the way businesses operate, with machine learning models now powering customer service, logistics, and product recommendations at scale.'","exampleUseCases":[{"title":"SEO keyword tagging for blog posts","prompt":"Pull the top 8 keywords from this blog post so I can tag it properly for SEO: 'Remote work has changed how teams collaborate, with video conferencing, async messaging, and cloud tools becoming essential to daily productivity.'"},{"title":"Topic labeling for customer feedback","prompt":"Extract the 5 most important keywords from this customer review so I can categorize it: 'The delivery was late, packaging was damaged, but the product itself worked perfectly and setup was straightforward.'"},{"title":"Content indexing for a document archive","prompt":"Give me the main keywords from this research abstract — limit it to 10 — so I can index it in our document library: 'This study examines the long-term effects of sleep deprivation on cognitive performance, memory consolidation, and emotional regulation in adults over 40.'"}],"resultDescription":"Returns a JSON object containing a 'keywords' array of the most relevant terms or phrases extracted from the input text, ordered by relevance or frequency depending on the model's logic.","failureModes":["Missing required 'text' field returns a validation error","Empty string input may return an empty keywords array","Very short text may yield fewer keywords than max_keywords requested","max_keywords set to 0 or negative values may cause unexpected behavior","Rate limiting or payment failure (402) if USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when you need lightweight, pay-per-call keyword extraction without account setup, and your workflow already uses x402 crypto micropayments. It is ideal for agents processing variable volumes of documents where per-call pricing is more cost-effective than a subscription. Prefer it over heavy NLP pipelines when you only need keywords, not full entity recognition or deep semantic parsing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:26:36.344Z","isFirstParty":false}