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x-402 Vision — Image Understanding API
x402
x-402 Vision — Image Understanding API is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-28).
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.
Price / call$0.02
Success—
StatusUnknown
How this service works
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…
Output
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.
Example use cases
Product image content verification
“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?”
Accessibility alt-text generation
“Describe this image in plain English so I can use it as alt text: https://myblog.com/uploads/hero-banner.png”
Receipt or document data extraction
“I've got a base64-encoded photo of a receipt — can you tell me the total amount and the merchant name shown on it?”
Technical details
Endpoint
GEThttps://api.x-402.online/v1/vision?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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