Side-by-side comparison of every supported captcha protection: parameters, pricing, response shape, and when to pick which.

Captcha types at a glance

Four protections are supported. They share the same /solve endpoint but have different shapes and behaviours.

Side-by-side

Property	Cloudflare Turnstile	Cloudflare Challenge	Kasada	Akamai
`type` value	`turnstile`	`challenge`	`kasada`	`akamai`
Long alias	`cloudflare-turnstile`	`cloudflare-challenge`	`kasada-bypass`	`akamai-bypass`
Per 1,000 solves	$0.40	$0.50	$1.50	$2.00
Per solve	$0.0004	$0.0005	$0.0015	$0.0020
Average solve time	~1s	1–5s	3–10s	4–12s
Required fields	`site_key`, `url`	`url`, `proxy`	`url`, `kasada_config`	`url`, `proxy`, `user_agent`
Proxy required?	No	Yes	No	Yes
Response payload	`token`	`cookies` (+ `user_agent`)	`headers` (`x-kpsdk-*`)	`cookies` (`_abck`, …)
Replay binding	Anywhere	Same proxy IP + same UA	Same UA	Same proxy IP + same UA

A visible <div> with data-sitekey, usually next to a 'Verify you are human' label. Use Turnstile.

A full-page interstitial before the real content loads, or an invisible block on automation. Use Challenge.

Requests to /p.js, /fp, /tl, or response headers prefixed x-kpsdk-. Use Kasada.

Akamai Bot Manager sensor and _abck cookie on the response. Use Akamai.

Read allowed_types from GET /balance:

{
  "allowed_types": ["turnstile", "challenge"]
}

A solve of a type outside that list returns:

{
  "success": false,
  "error": "Captcha type 'kasada' is not allowed for your account"
}

Ask an admin to expand your allowed types if you need more.