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main-image-detect
x402
main-image-detect is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Extracts the main representative image from any URL by preferring Open Graph/Twitter meta tags, then falling back to the largest declared content image, returning alt text, resolved URL, content type, and byte size.
Price / call$0.01
Success—
StatusUnknown
How this service works
Main image of a page: the Open Graph / Twitter image when declared, else the largest content image by declared dimensions, with alt text, resolved URL, content type and byte size via a HEAD request. Get a representative thumbnail for any URL. $0.01 per page.
Output
Returns the resolved URL of the main page image (Open Graph > Twitter Card > largest declared content image), along with its alt text, MIME content type, and byte size obtained via a HEAD request against the image URL.
Example use cases
Link preview thumbnail for shared URLs
“I'm building a link preview card — can you grab the main image for https://techcrunch.com/2024/01/15/openai-news/ so I can show a thumbnail next to the headline?”
Social media OG image audit
“Check what image shows up when someone shares https://mystore.com/products/running-shoes on social media — I want the resolved image URL, alt text, and file size.”
Content aggregator image enrichment
“For this article URL https://www.wired.com/story/best-laptops/, find the representative thumbnail image — I need the image URL, its format, and how big the file is in bytes.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/page/main-imageWhen to prefer
Use this endpoint when you need a single representative thumbnail for any public URL without writing custom scraping logic. It is ideal for link-preview generation, content aggregation pipelines, and social-sharing audits where you want the canonical OG/Twitter image with fallback to the largest declared image — and you also need file metadata (content type, byte size) without downloading the full image.
Side effects
- Page has no images and no OG/Twitter meta tags — returns null or empty image result
- Target URL is unreachable or returns non-2xx status — fetch fails with an error
- Image URL found in meta tags returns a 4xx/5xx on HEAD request — byte size and content type may be unavailable
- Page blocks crawlers via robots.txt or bot detection — HTML may not be accessible
- Redirects to a login wall or CAPTCHA page — no meaningful image can be detected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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