Imperva Reese84 ACTIVE

Overview

Imperva's Reese84 challenge is a JavaScript VM that collects browser fingerprints, serializes them through a custom encryption pipeline, and sends the result to an interrogation endpoint that returns the reese84 cookie. VexSolver reverses the VM, generates a matching fingerprint, and posts the interrogation natively — no browser involved.

The engine also handles the UTMVC and CWUDNSAI second-layer challenges that some Imperva-protected sites add on top. Every solve runs through an end-to-end verify step: we re-fetch the target with the minted cookies before we tell you success: true.

Cookies returned

• › reese84 — primary interrogation token
• › visid_incap_<site_id> — Imperva visitor ID
• › incap_ses_<num>_<site_id> — session cookie
• › nlbi_<site_id>_<lb_id> — load balancer ID
• › ___utmvc — UTMVC layer (when present)

Step 1 — Submit

curl -X POST https://api.vexsolver.com/api/solve \
  -H "X-API-Key: sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://www.smythstoys.com/uk/en-gb",
    "proxy": "http://user:pass@your-proxy:8080"
  }'

# → { "taskId": "..." }

Step 2 — Poll

curl -G "https://api.vexsolver.com/api/getTaskResult" \
  -H "X-API-Key: sk_live_..." \
  --data-urlencode "taskId=<taskId>"

Force fresh solve

curl -X POST https://api.vexsolver.com/api/solve \
  -H "X-API-Key: sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://www.smythstoys.com/uk/en-gb",
    "proxy": "http://user:pass@your-proxy:8080",
    "fresh": true
  }'

Poll result shape

{
  "success": true,
  "vendor": "incapsula",
  "source": "incap_solver",
  "target": "https://www.smythstoys.com/uk/en-gb",
  "attempts": 1,
  "cached": false,
  "elapsed_ms": 2990,
  "solve_ms": 2990,
  "solved_at": 1776997541,
  "expires_at": 1776998141,
  "ttl_sec": 600,
  "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36",
  "proxy_fp": "a31b77de2091",
  "cookies": "reese84=3:abc...; visid_incap_2483049=mP5vmbq...; incap_ses_780_2483049=npbsJ+oQrR...; nlbi_2483049=r/3IGfH+O0Y...",
  "cookie_map": {
    "reese84":                "3:abc...",
    "visid_incap_2483049":    "mP5vmbq1SFyIiwni...",
    "incap_ses_780_2483049":  "npbsJ+oQrR2CO+VQ...",
    "nlbi_2483049_2147483392": "r/3IGfH+O0YF4v3S..."
  }
}

Python end-to-end example

import time, requests

API = "https://api.vexsolver.com"
KEY = "sk_live_..."
HEADERS = {"X-API-Key": KEY, "Content-Type": "application/json"}
PROXY = "http://user:pass@your-proxy:8080"

# 1. Submit
r = requests.post(f"{API}/api/solve", headers=HEADERS,
    json={"url": "https://www.smythstoys.com/uk/en-gb", "proxy": PROXY})
task_id = r.json()["taskId"]

# 2. Poll
for _ in range(60):
    time.sleep(2)
    r = requests.get(f"{API}/api/getTaskResult",
        params={"taskId": task_id}, headers={"X-API-Key": KEY})
    data = r.json()
    if data.get("status") != "pending":
        break
if not data["success"]:
    raise RuntimeError(data.get("error"))

# 3. Replay through the SAME proxy + same UA
session = requests.Session()
session.headers["Cookie"]     = data["cookies"]
session.headers["User-Agent"] = data["user_agent"]
page = session.get("https://www.smythstoys.com/uk/en-gb",
    proxies={"http": PROXY, "https": PROXY})
print(page.status_code)

Typical performance

• › Cache hit: 1-30 ms (cached: true)
• › Replay template: 2-4 seconds
• › Cold capture: 5-8 seconds (first time seeing a new site)