{"uid":"cap_GEywRtMMAyHeGIbhIbZ9N","slug":"gedx402-uform-gen2-qwen-500m-image-captioning-d59d50fb","name":"GEDX402 uform-gen2-qwen-500m Image Captioning","description":"x402 workers ai. pay with usdc on base, polygon, arbitrum, world, or solana. no api keys.","url":"https://media.gedx402.com/v1/caption/uform-gen2-qwen-500m","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"image":{"type":"string","description":"Base64-encoded image for multimodal input."},"prompt":{"type":"string","description":"Optional question or instruction about the image."},"max_tokens":{"type":"integer","description":"Maximum tokens in the vision model response."}}},"responseSchema":{"type":"json","example":{"description":"A sunset over mountains."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.415","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":"$0.415/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.415","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.415","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yCaw-ATTdZe7EgVDJTGhP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.415","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a natural language caption or answer from a base64-encoded image using the UForm-Gen2-Qwen-500M vision-language model, payable via USDC on multiple chains with no API key required.","exampleAgentPrompt":"Can you look at this image (I'll send it as base64) and describe what's in it — up to 200 tokens? No specific question, just a general caption.","exampleUseCases":[{"title":"Generate alt-text for social media posts","prompt":"I've got a bunch of product photos I need alt-text for — can you look at each one (I'll send them as base64) and generate a short, descriptive caption? Nothing fancy, just something concise that describes what's actually in the image."},{"title":"Analyze security camera footage frames","prompt":"I'm reviewing some security camera screenshots from today — can you take a look at each frame (base64 format) and tell me what's happening in the image? Just describe the scene, any people, vehicles, or activity you can spot."},{"title":"Extract descriptions from user uploads","prompt":"Users are uploading images to our platform and I need to auto-generate descriptions for them. Can you process these images (I'll provide them as base64) and give me a natural language description of what each one shows?"}],"resultDescription":"A JSON object with a 'description' field containing a natural language caption or answer about the provided image, e.g. {\"description\": \"A sunset over mountains.\"}","failureModes":["Invalid or malformed base64 image data returns an error","Missing required 'image' field causes a bad request","max_tokens too large may exceed model limits","Payment not fulfilled results in HTTP 402 response","Unsupported image format (non-JPEG/PNG) may fail silently or produce poor output"],"whenToPreferThis":"Choose this endpoint when you need lightweight, fast image captioning or visual QA without managing API keys, billed per-call via USDC on Base, Polygon, Arbitrum, World, or Solana. Ideal for agents that need to caption or describe images on demand in a pay-as-you-go fashion using the x402 payment protocol.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:44:00.512Z","isFirstParty":false}