Deposit spam was never about the money.
A flood of automated payment attempts hits your deposit endpoint — testing stolen card and wallet credentials at scale while burying your approval rate in failures. The money rarely arrives. The damage does.
Does this sound like you?
If even a couple of these feel familiar, it’s probably already happening on your platform.
Your deposit approval rate keeps sliding, even though real players haven't changed.
What it means: The metric is drowning in automated failures — genuine deposits are buried underneath.
Your payment provider has started sending warnings: higher fees, a rolling reserve, questions about unusual decline activity.
What it means: The provider prices your traffic by its failures. Someone else's attack has become your rate card.
Declines arrive in waves — hours of quiet, then thousands of failed attempts in a burst.
What it means: That rhythm is a script working through a list, not customers having card trouble.
Cardholders you've never seen dispute charges — people who insist they never visited your site.
What it means: Their cards were tested on your deposit form. You're where a stolen list got verified.
How the attack actually works
No security background needed — here’s the whole play, start to finish.
The list
The attacker buys a list of stolen card and wallet credentials. Nobody knows which ones still work — your deposit form is where they find out.
The flood
A script fires deposit attempt after deposit attempt from many genuinely different devices. Most fail. The few that clear mark a live card — catalogued and resold. Nobody is depositing to play.
The fallout
Your approval rate collapses under the failures. To your payment provider you now look like the problem: higher fees, rolling reserves, holds — and eventually the threat of losing the relationship itself.
How SignalGate stops it
One call on your critical path. The verdict comes back before anything happens.
Campaign-scale detection
Sees thousands of failed attempts from thousands of genuinely different devices as what they are — one coordinated operation — instead of a pile of unrelated declines.
Behavioral anomaly detection
Learns what a genuine depositor looks like on your own traffic. A script working through a purchased list moves nothing like a player funding an account.
Pre-provider verdict
Once you turn blocking on, the verdict lands before the attempt ever reaches your payment provider. Blocked attempts never touch your approval rate — the exact number the attack was burying.
Fingerprinting catches one device pretending to be many. SignalGate catches the opposite — many genuinely different devices working as one operation — the fraud that device fingerprinting alone was never built to see.
Wire it in, in minutes
Start with two fire-and-forget calls to /v0/log — log the action and the target action. No blocking, no user impact, nothing on your critical path.
Log deposit attempts and successful deposits
from datetime import datetime, timezone
from signalgate import Client, Event, EncryptedPayload
client = Client(api_key="pk_live_...")
def sg_event(body: dict, method: str) -> Event:
# Each request carries its OWN "signalgate" envelope from the browser SDK
return Event(
user_id=body["user_id"],
ip=request.headers.get("X-Forwarded-For", request.remote_addr),
method=method,
timestamp=datetime.now(timezone.utc).isoformat(),
payload=EncryptedPayload(**body["signalgate"]),
)
@app.post("/api/deposit")
def deposit_attempt():
body = request.get_json()
# ...your deposit-processing logic...
client.log(sg_event(body, method="deposit.attempt")) # AFTER the attempt is handled
return {"ok": True}
@app.post("/api/deposit/confirmed")
def deposit_succeeded():
body = request.get_json()
# ...your settlement-confirmation logic...
client.log(sg_event(body, method="deposit.succeeded")) # its own fresh envelope
return {"ok": True}Within days the dashboard shows how much of your traffic is one coordinated operation — before you turn on blocking.
Stop fraud before it reaches your backend.
Free for everyone through 2026. Two lines of code. No demo required.