> For the complete documentation index, see [llms.txt](https://docs.vsat.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vsat.dev/understanding-datadome/dd-flow.md).

# The challenge flow

A full interstitial solve, end to end. You own every network request; the solver only turns a challenge page into a payload.

```
1. GET https://target/            (your transport, your proxy)
   └─ 403 + dd={'rt':'i', cid, hash, …}          ← challenged with an interstitial

2. GET the interstitial page from geo.captcha-delivery.com/interstitial/?cid=…
   └─ ~500 KB HTML with the module-872 bundle inline

3. POST /interstitial  { userAgent, deviceLink, html }   → this API
   └─ { ok, payload }                             ← the body a browser would submit

4. POST the payload back to geo.captcha-delivery.com/interstitial/  (your transport)
   └─ 200 { redirect: "…" } + Set-Cookie: datadome=…  ← cleared, cookie minted

5. GET https://target/  with the datadome cookie  (your transport)
   └─ 200 the real page                            ← through
```

{% hint style="danger" %}
Use the **same** User-Agent, TLS fingerprint, IP and header order for every step. The `cid` is IP-bound; a payload built for one exit and spent from another is rejected. This is the single most common integration mistake.
{% endhint %}

The slider flow is the same shape with `/captcha/` in place of `/interstitial/` and a `/captcha/check` submit.


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