{"uid":"cap_-CWS8FZo_CrFSrJkh5cUK","slug":"primeapi-ai-caption-generator-6509bffa","name":"PrimeAPI AI Caption Generator","description":"Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.","url":"https://prime-api-seven.vercel.app/api/ai/caption","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"query":{"type":"string","description":"Search query or input parameter"}}},"responseSchema":{"type":"object","description":"API response data"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.097132","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":"$0.097132/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.097132","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.097132","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_VS9DOq3kDPaWlx8OJ2-d5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.097132","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a text caption for a given query or subject using AI","exampleAgentPrompt":"Can you write an AI-generated caption for a sunset photo at the beach — something short, evocative, and suitable for Instagram?","exampleUseCases":null,"resultDescription":"Returns an AI-generated caption string suitable for use as a social media caption, image description, or content label based on the provided query or subject.","failureModes":["Missing or empty query field returns an error or empty caption","Vague or ambiguous query may produce a generic or irrelevant caption","Payment failure (402) if USDC balance is insufficient on Base","Service unavailable (500) if the underlying AI model is temporarily down","Rate limiting if too many requests are sent in quick succession"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call AI caption generation without managing API keys — ideal for social media automation, content pipelines, or one-off caption needs where a lightweight text generation call suffices.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:53:55.269Z","isFirstParty":false}