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fastapi.online Image Q&A
x402
fastapi.online Image Q&A is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0015/call, status unknown (last checked 2026-09-14).
Answers natural-language questions about an uploaded image using a self-hosted visual question-answering model
Price / call$0.0015
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
A natural-language text answer to the posed question, grounded in the content of the uploaded image — e.g. object identification, count, color, text readout, spatial relationship, or scene description depending on what was asked.
Example use cases
Product image detail extraction
“Here's a product photo from a supplier — can you tell me what the label says and whether there's a barcode visible on the packaging?”
Field inspection photo analysis
“I've uploaded a photo of the building facade taken during inspection — does it show any visible cracks or water damage on the exterior walls?”
Menu or document quick question
“I have a photo of a restaurant menu — what's the price listed for the grilled salmon dish?”
Technical details
Endpoint
POSThttps://api.fastapi.online/image-qaWhen to prefer
Choose this endpoint when you need to ask a specific, targeted question about image content rather than a generic caption — ideal for extracting precise details (text, counts, attributes, spatial relationships) from photos without building or hosting your own VQA model. At $0.0015 per call with no signup required and pay-per-use crypto billing, it suits low-volume or ad-hoc agent workflows where spinning up a dedicated vision API account isn't justified.
Side effects
- Unsupported image format returns an error — only PNG, JPEG, and WebP are accepted
- Very low-resolution or heavily compressed images may yield vague or incorrect answers
- Questions requiring world knowledge beyond the image content may produce hallucinated or uncertain responses
- Missing 'question' field results in a request validation error
- Payment failure or insufficient USDC balance blocks the call with a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| file | string | Image file (PNG/JPEG/WebP) |
| question | string |
Tags
x402
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