{"uid":"cap_JZIgtYFn4HWFbxI8gZqc8","slug":"nexusapi-ai-caption-generator-15ce8e17","name":"NexusAPI AI Caption Generator","description":"Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.","url":"https://nexus-api-peach-nine.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_Ro-gW9Co5jL7AOy2wZKAG","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 descriptive or creative caption for a given query or image concept using AI","exampleAgentPrompt":"Generate an AI caption for a photo of a golden retriever playing on the beach at sunset — something upbeat and suitable for an Instagram post.","exampleUseCases":null,"resultDescription":"Returns an AI-generated caption string based on the input query or image concept, suitable for use in social media posts, product listings, or image descriptions.","failureModes":["Empty or missing query field returns a 400 bad request error","Payment not completed returns 402 Payment Required","Ambiguous or too-short query may produce a generic or low-quality caption","Service unavailable returns 500 internal server error","Rate limiting or quota exceeded may return 429 Too Many Requests"],"whenToPreferThis":"Use this endpoint when you need to quickly generate AI-written captions for images, social media posts, or content based on a text prompt, and want to pay per call without managing API keys. Best for agents that need on-demand captioning without a standing subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:54:13.611Z","isFirstParty":false}