Stop fraud before it reaches your checkout
One API to score payments, verify cards and IBANs, spot VPNs and proxies, check emails and phone numbers, and moderate text — in milliseconds, with every decision explained.
No credit card. Live and test keys in one minute.
{
"data": {
"score": 82,
"rules": [
{ "id": "PF10003", "description": "Customer IP address is probably VPN/Proxy/Hosting." },
{ "id": "PF10004", "description": "Customer email address is probably disposable." },
{ "id": "PF10002", "description": "High purchase rate according to customer_id." }
],
"rulesChecked": 25,
"rulesDetected": 3
},
"status": "success",
"executionTime": 5
}- detection services
- 9detection services
- response languages
- 8response languages
- requests per second
- 1,000requests per second
- response formats
- 4response formats
Nine services, one key
Combine only what you need. Every service returns a clear signal you can act on — block, review or allow.
Payment fraud analysis
Score every transaction against 25+ risk rules before you capture it.
ExploreCard issuer (BIN) verification
Know the scheme, type, issuing bank and country behind a card from its first digits.
ExploreIBAN validation
Validate IBAN structure and checksum and learn the country and bank formats.
ExploreContent moderation
Screen text for profanity and abuse in Arabic, English and more — before it is published.
ExploreVPN & proxy detection
Flag anonymising traffic: VPNs, proxies, Tor exits, relays, bots and hosting providers.
ExploreIP location intelligence
Country, region, city, coordinates, timezone, currency, language and ISP for any IP.
ExploreNetwork intelligence (ASN)
Understand the network behind an IP or domain: owner, type, country and contacts.
ExploreCountry intelligence
Names in eight languages, currency, capital, phone code, timezones, neighbours and more.
ExploreEmail & phone scoring
Go beyond syntax: is this address or number real, disposable or likely abusive?
ExploreBuilt for the places fraud happens
Pick the signals that matter to your business and combine them into one decision.
E-commerce & digital goods
Instant-delivery products are a favourite of fraudsters. Score every order before you deliver a code, top-up or voucher.
Fintech & payments
Validate IBANs and cards, detect risky geographies and keep deposits and withdrawals clean.
Gaming & top-ups
Spot account farming, bonus abuse and stolen-card top-ups while keeping real players moving.
Marketplaces
Verify buyers and sellers, moderate listings and reviews, and cut off repeat offenders.
Sign-up abuse
Catch disposable emails, fake phone numbers and VPN-hopping multi-accounters at registration.
Account takeover
Compare login geography and network reputation to your user history and step up verification when it looks off.
Chargeback reduction
Stop likely-fraud orders before they become disputes, and keep an auditable reason for every decision.
Integrate in minutes
Plain HTTPS and JSON. Authenticate with a key parameter or a Bearer header, read the score, decide.
- Responses in JSON, XML, CSV or newline format
- Localised in 8 languages with one parameter
- A free test mode with fake-but-realistic data
- Webhooks signed with HMAC-SHA256
curl -G "https://gurdx.cretip.com/api/lookup/ip" \
--data-urlencode "key=YOUR_API_KEY" \
--data-urlencode "ip=1.1.1.1"<?php
$response = file_get_contents('https://gurdx.cretip.com/api/lookup/ip?'.http_build_query(['key' => 'YOUR_API_KEY', 'ip' => '1.1.1.1']));
$result = json_decode($response, true);
if ($result['status'] === 'success') {
print_r($result['data']);
} else {
echo $result['code'].': '.$result['description'];
}const params = new URLSearchParams({"key":"YOUR_API_KEY","ip":"1.1.1.1"});
const res = await fetch(`https://gurdx.cretip.com/api/lookup/ip?${params}`);
const result = await res.json();
if (result.status === 'success') {
console.log(result.data);
} else {
console.error(result.code, result.description);
}import requests
res = requests.get("https://gurdx.cretip.com/api/lookup/ip", params={"key": "YOUR_API_KEY", "ip": "1.1.1.1"})
result = res.json()
if result["status"] == "success":
print(result["data"])
else:
print(result["code"], result["description"])Integrate in minutes. One URL, one key.
Gurdx is plain HTTPS and JSON with a consistent response envelope and a single, predictable error format. Add a key, call an endpoint, read the score — your first check can be live in minutes.
- One response shape for every service
- Numbered error codes you can handle in a switch
- Shared options: format, lang, mode, params, callback, userID
GET https://gurdx.cretip.com/api/lookup/ip?key=YOUR_API_KEY&ip=1.1.1.1{
"data": { "ip": "1.1.1.1", "countryCode": "AU", "scoring": { "threat_score": 12 } },
"status": "success",
"executionTime": 4
}Frequently asked questions
What is Gurdx?
Gurdx is a fraud-prevention and user-intelligence API. It scores IP addresses, payments, cards, IBANs, emails, phone numbers and text so you can block abuse automatically or send risky cases to review.
How hard is it to integrate?
It is a plain REST API over HTTPS that returns JSON. Add your key, call an endpoint and read the score. Most teams have their first check running in minutes, and test mode lets you build without spending quota.
How does the free trial work?
Register and you immediately get a live and a test key on a trial plan with a monthly quota and every service unlocked. Test-mode requests are always free.
What happens to the data I send?
Card numbers are never stored — only the BIN, the last four digits and a keyed hash. You can delete any user's data through the API at any time. See the privacy policy for details.
Is a score a final verdict?
No. Scores and rules are signals. We recommend blocking only the clear-cut cases and routing the middle band to manual review. Custom rules and blacklists let you encode your own policy.
What are the rate limits?
Up to 1,000 requests per second per account, plus a monthly quota depending on your plan. Going over returns a clear error code you can handle.
Ready to cut fraud without cutting conversion?
Start free, test with fake data, then go live with the same key shape.