An AML platform engineers don't dread.

const { SentinelClient } = require('@airvend/sentinel-client')
const sentinel = new SentinelClient({ url, apiKey, secret })

// Ask before money moves. Times out at 300 ms and fails open.
const decision = await sentinel.decide({
  subject: { external_id: 'cus_8812', bvn, tier: '2' },
  transaction: { reference, direction: 'out', type: 'transfer', amount: 4_850_000 },
  context: { ip, device_id },
})

if (decision.outcome === 'block') return refuse()
if (decision.outcome === 'review') return stepUpAuth()

use Sentinel\Client\Laravel\Sentinel;

// Before debiting on risky flows
$decision = Sentinel::decide(
    ['external_id' => $user->id, 'bvn' => $user->bvn],
    ['reference' => $ref, 'direction' => 'out',
     'type' => 'transfer', 'amount' => 4850000],
);

if ($decision->blocked()) { /* refuse */ }
if ($decision->needsReview()) { /* hold or step up */ }

// After every transaction (queued, never throws)
Sentinel::transaction($subject, $tx + ['status' => 'success']);

from sentinel_client import SentinelClient

sentinel = SentinelClient(url=URL, api_key=KEY, secret=SECRET)

decision = sentinel.decide(
    {"external_id": "cus_8812", "bvn": bvn},
    {"reference": ref, "direction": "out",
     "type": "transfer", "amount": 4850000},
    SentinelClient.context_from_request(request),
)

if decision["outcome"] == "block":
    raise PaymentBlocked()

// POST /api/v1/decisions → 200
{
  "outcome": "review",
  "score": 64,
  "reasons": [
    { "rule": "GLB_STRUCTURING_IN", "action": "review",
      "reason": "3 transfers in 7 days just under ₦5m" },
    { "rule": "GLB_NEW_DEVICE_HIGH_VALUE", "action": "review",
      "reason": "High value from a device first seen today" }
  ],
  "decision_id": 991,
  "latency_ms": 12
}