Amex 3DS Challenge Test Card Numbers
Amex · 3DS Challenge: 3DS challenge requires customer authentication. MockCard includes next_action.redirect_to_url on the payment_intent, matching Stripe 3DS patterns.
American Express uses 15-digit card numbers and separate CVV rules. MockCard generates Amex-shaped test data so formatting validators pass before you hit a real gateway.
When to use: Test redirect flows, return_url handling, and abandonment when the user closes the challenge window.
CI tip: Combine with the chaos 3ds_abandoned scenario on Pro for abandonment after challenge starts.
Typical decline_code in webhook payloads: authentication_required.
Click card to flip
Same scenario, other networks
Need webhook race conditions or 3DS abandonment? See payment failure testing and the API docs. Compare plans on pricing.
API example
const res = await fetch("https://mockcard.io/api/v1/generate", {
method: "POST",
headers: {
"Content-Type": "application/json",
"X-Api-Key": process.env.MOCKCARD_API_KEY ?? "",
},
body: JSON.stringify({
brand: "visa", // visa | mastercard | rupay | amex
scenario: "success", // success | insufficient_funds | 3ds_challenge …
}),
});
const card = await res.json();
// { card_number, expiry_month, expiry_year, cvv, brand, scenario }
console.log(card.card_number, card.cvv);