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shelf.thirdmade.net CAPTCHA Classifier
x402
shelf.thirdmade.net CAPTCHA Classifier is a paid API for AI agents from shelf.thirdmade.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Identifies the type and difficulty of a CAPTCHA on a given page (reCAPTCHA, hCaptcha, Turnstile, image, slider, puzzle) — evaluation only, no solving.
Price / call$0.01
Success—
StatusUnknown
How this service works
Classifies captcha type (reCAPTCHA, hCaptcha, Turnstile) and difficulty. Eval only — we do NOT solve captchas.
Output
Returns the detected captcha type (one of: recaptcha, hcaptcha, turnstile, image, slider, puzzle) and a difficulty rating for the challenge found on the probed page.
Example use cases
Pre-scraping bot protection audit
“Before I set up my scraper for this site, can you tell me what kind of captcha they're using — reCAPTCHA, hCaptcha, Turnstile, or something else — and how difficult it is?”
Automation pipeline compatibility check
“I'm building an agent that needs to log into several sites — can you classify the captcha type for the login page so I know what challenge handling I'll need?”
Security research CAPTCHA fingerprinting
“I'm surveying bot protection methods across e-commerce sites — can you probe this checkout page and tell me whether it's using reCAPTCHA, Turnstile, a slider, or an image captcha, and its difficulty level?”
Technical details
Endpoint
GEThttps://shelf.thirdmade.net/probe/captcha-evalWhen to prefer
Use this endpoint when you need to fingerprint what kind of bot protection a site uses before building automation, selecting a bypass strategy, or auditing a set of domains for CAPTCHA diversity. It is purely evaluative — choose it when you need classification metadata, not solving capability.
Side effects
- No captcha detected on the page — returns null or unknown type
- Target page is unreachable or returns non-200 status
- Captcha type is novel or obfuscated and cannot be classified
- Query param 'type' enum value is unrecognized or misspelled
- Rate limiting or payment failure returns 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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