Amex Network Timeout Test Card Numbers
Amex · Network Timeout: network_timeout introduces a ~10s delay before the gateway responds. Use it to test client timeouts, webhook retry storms, and queue workers that assume fast responses.
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: Load tests and resilience checks where your HTTP client timeout is shorter than gateway latency.
CI tip: Run with webhook_url set to measure whether your handler times out before the event arrives.
Typical decline_code in webhook payloads: processing_error.
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);