{"uid":"cap__D65f674ZlAUaWLqxklg6","slug":"x-402-vision-image-understanding-api-4c47f4e5","name":"x-402 Vision — Image Understanding API","description":"Answer a question about an image, or describe it, from a URL or base64. Image understanding pay-per-call, no account and no API key: send an image URL (or base64) and an optional question, receive a plain-language answer from a multimodal…","url":"https://api.x-402.online/v1/vision?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FCx2VgvdY0orL3dcb_b1k","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Answers questions about an image or describes it, accepting a URL or base64 input, and returning a plain-language response from a multimodal AI model with no account or API key required.","exampleAgentPrompt":"Look at this image — https://example.com/photo.jpg — and tell me what's in it. Is there a dog in the photo?","exampleUseCases":[{"title":"Product image content verification","prompt":"Here's a product image URL — https://shop.example.com/items/123.jpg — can you check whether it actually shows the red sneaker described in the listing?"},{"title":"Accessibility alt-text generation","prompt":"Describe this image in plain English so I can use it as alt text: https://myblog.com/uploads/hero-banner.png"},{"title":"Receipt or document data extraction","prompt":"I've got a base64-encoded photo of a receipt — can you tell me the total amount and the merchant name shown on it?"}],"resultDescription":"A plain-language text response from a multimodal AI model answering the provided question about the image, or a general description of the image if no question was supplied.","failureModes":["Image URL is inaccessible or returns a non-image response, resulting in an error","Base64 string is malformed or not a supported image format","Question is ambiguous or unanswerable from the image content alone","Payment of $0.02 USDC not received, request rejected","Large or high-resolution images may time out or increase latency"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call image understanding with zero setup — no API key, no account, no subscription. It's ideal for AI agents that encounter images opportunistically and need quick visual Q&A or description without committing to a vision API provider. Prefer it over OpenAI Vision or Google Vision when you want micropayment-based access via the x402 protocol on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T12:43:35.183Z","isFirstParty":false,"canonicalSlug":"x-402-vision-image-understanding-api-4c47f4e5"}