{"uid":"cap_ragMAdv7TKkq4ltnGNS18","slug":"fastapi-online-word-definition-lookup-5a724014","name":"fastapi.online — Word Definition Lookup","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/define-word","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"word":{"type":"string","maxLength":100,"minLength":1},"context":{"type":"string","maxLength":500}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0005","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":"$0.0005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_SBF3uuW57s92xvYnYDdMt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a definition for a given word, optionally contextualized by a provided context string, using self-hosted AI inference.","exampleAgentPrompt":"What does the word 'sanguine' mean? Give me the definition — if it helps, use the context that I'm reading a Victorian-era novel.","exampleUseCases":[{"title":"Vocabulary help while reading","prompt":"I just came across the word 'apostasy' in an article about religion — what does it mean in that context?"},{"title":"Technical term clarification","prompt":"Can you define the word 'idempotent' for me? The context is software engineering and API design."},{"title":"Writing assistance for precise word choice","prompt":"What does 'laconic' mean? I'm writing a formal essay and want to make sure I'm using it correctly."}],"resultDescription":"A natural-language definition of the submitted word, potentially shaped by the optional context provided, generated by a self-hosted AI inference model.","failureModes":["Word field is empty or missing — validation error returned","Word exceeds 100-character limit — request rejected","Context exceeds 500-character limit — request rejected","Ambiguous or nonsense input word — model may return a best-effort or fallback definition","Payment not included or insufficient — 402 Payment Required response","Model inference timeout or service unavailability — 5xx error"],"whenToPreferThis":"Choose this endpoint when you need a quick, AI-generated word definition without requiring a dictionary API account or signup. Particularly useful when context-aware definitions are needed (e.g., domain-specific meanings), and when crypto micropayment per-call billing is preferred over subscription pricing. Ideal for agents needing lightweight, on-demand vocabulary lookups.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:08:27.963Z","isFirstParty":false}