{"uid":"cap_HToazfogT4d1DlWeCqElg","slug":"fastapi-online-synonym-suggest-e1c978d6","name":"fastapi.online Synonym Suggest","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/synonym-suggest","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"word":{"type":"string","maxLength":100,"minLength":1},"count":{"type":"integer","maximum":20,"minimum":1}}},"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_tSyV-XqBwU7f0PtXl-FRK","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 list of synonyms for a given word, up to a specified count","exampleAgentPrompt":"Can you suggest 8 synonyms for the word 'melancholy' so I can vary my writing?","exampleUseCases":[{"title":"Diversify word choice in essays","prompt":"I'm writing an essay and I've used the word 'important' too many times — give me 10 synonyms for it so I can mix things up."},{"title":"Expand vocabulary for content creation","prompt":"I need 5 synonyms for the word 'innovative' to use in a marketing blog post — can you look those up for me?"},{"title":"Build a thesaurus-style feature in an app","prompt":"For my writing assistant app, fetch me up to 15 synonyms for the word 'happy' so I can populate the suggestions panel."}],"resultDescription":"A list of synonym words (up to the requested count) for the input word, returned as structured data from a self-hosted NLP model.","failureModes":["Word not recognized or too obscure — may return empty synonym list","Count exceeds maximum of 20 — request rejected with validation error","Empty or blank word input — returns 400 validation error","Word with length over 100 characters — rejected by schema","Network or model inference failure — returns 5xx error"],"whenToPreferThis":"Choose this endpoint when you need quick, pay-per-call synonym suggestions without signup, especially in agent workflows where no Merriam-Webster or Thesaurus.com API key is available. Best for lightweight vocabulary enrichment tasks where cost per call ($0.0005 USDC) is preferable to subscription-based alternatives. Ideal for anonymous, one-off lookups paid with crypto.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:01:58.778Z","isFirstParty":false}