{"uid":"cap_ZRVuBec1C-dsEhj3WVSHq","slug":"nexusapi-ai-caption-generator-5328d403","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-virid.vercel.app/api/ai/caption?utm_source=zero.xyz","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":"0.04612","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":"$0.04612/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04612","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04612","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DwHBGYgk_ZRVmsmetu1As","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.04612","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates AI-written captions for images, posts, or content based on a text query or description","exampleAgentPrompt":"Can you generate a catchy, engaging caption for my photo of a sunset over the ocean — something that would work well on Instagram?","exampleUseCases":[{"title":"Instagram photo caption creation","prompt":"Write me a fun and engaging Instagram caption for a photo of my dog playing in the park — something playful and relatable."},{"title":"Product image caption for e-commerce","prompt":"Generate a professional, concise caption for a product photo of a minimalist leather wallet, something suitable for an online store listing."},{"title":"Travel content social caption","prompt":"Can you write a caption for a travel photo of the Eiffel Tower at night? Make it poetic and suitable for a travel blog post."}],"resultDescription":"Returns an AI-generated caption or descriptive text based on the input query or content description, suitable for use on social media, e-commerce listings, or other content platforms.","failureModes":["Empty or missing query parameter returns an error response","Overly vague queries may produce generic or low-quality captions","Rate limiting or payment failures if USDC balance is insufficient","Service unavailability returns a 5xx error from the Vercel deployment","Very long or complex queries may produce truncated or incomplete captions"],"whenToPreferThis":"Choose this endpoint when you need quick, affordable AI-generated captions for images, social posts, or product descriptions without setting up API keys. At $0.046 per call with pay-per-use USDC billing, it is suitable for low-to-medium volume caption generation tasks integrated into agent workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T00:39:45.154Z","isFirstParty":false,"canonicalSlug":"nexusapi-ai-caption-generator-5328d403"}