{"uid":"cap_57O9uz8QBCIE4q64wJcqZ","slug":"apexapi-ai-caption-generator-dddefb3c","name":"ApexAPI AI Caption Generator","description":"Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.","url":"https://apex-api-gamma.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_vXuH1uzbaR12khChbvqxh","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 caption for a given query or image context using AI","exampleAgentPrompt":"Can you write me a catchy AI-generated caption for a photo of a sunset over the ocean — something that would work well on Instagram?","exampleUseCases":null,"resultDescription":"Returns an AI-generated caption string based on the provided query or image context, suitable for use on social media or as descriptive text.","failureModes":["Empty or missing query field returns an error or blank caption","Vague or ambiguous query may produce generic or unhelpful captions","Service unavailable if payment in USDC on Base is not completed","Rate limits or server errors from the underlying Vercel deployment"],"whenToPreferThis":"Use this endpoint when you need a quick AI-generated caption for an image or social media post and want to pay per call in USDC without managing API keys. Best suited for social media automation, content creation pipelines, or when generating one-off captions on demand.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:03:57.039Z","isFirstParty":false}