Test Card Generator API

About the Test Card Generator API

Card Generator works by generating valid test/sample card numbers based on the specified brand and count. It uses predefined rules and algorithms to generate the card numbers, then returns the list of generated card numbers in a structured format.

What people use it for

Checkout UI Validation

Frontend developers mock form inputs with formatted unmasked card strings and expiration dates to test responsive payment component styling.

Staging Sandbox Transactions

When staging an ecommerce build, QA engineers submit generated card numbers and CVV codes to sandbox payment processors without exposing real credentials.

Receipt Layout Proofing

Designers populate order confirmation templates using masked card numbers and card brands to verify invoice rendering across email clients.

Form Auto-Formatting QA

Feed raw card numbers into billing inputs to verify that client-side scripts correctly format spacing and extract the last four digits.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

Request parameters — GET /v1/cardgenerator

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Optional

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curl "https://api.apiverve.com/v1/cardgenerator?brand=visa&count=5&includeAvatar=true" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — GET /v1/cardgenerator

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "status": "ok",
  "error": null,
  "data": {
    "brand": "visa",
    "count": 5,
    "cards": [
      {
        "cvv": 175,
        "issuer": "SOUTHEAST F.C.U.",
        "id": "0faca124-9a33-4ac6-a3df-8bf103025779",
        "number": "4750377207233152",
        "expiration": "12/2030",
        "brand": "visa",
        "number_alt": {
          "masked": "************3152",
          "unmasked": "4750 3772 0723 3152",
          "last4": "3152"
        }
      },
      {
        "cvv": 129,
        "issuer": "U.S. BANK, N.A.",
        "id": "0d074efe-69e2-4e30-b49a-4cead1ea8411",
        "number": "4431387818727358",
        "expiration": "12/2030",
        "brand": "visa",
        "number_alt": {
          "masked": "************7358",
          "unmasked": "4431 3878 1872 7358",
          "last4": "7358"
        }
      },
      {
        "cvv": 249,
        "issuer": "AUGUSTA VAH F.C.U.",
        "id": "2f01f458-7422-400e-bbcf-41364564193b",
        "number": "4425919427248836",
        "expiration": "12/2030",
        "brand": "visa",
        "number_alt": {
          "masked": "************8836",
          "unmasked": "4425 9194 2724 8836",
          "last4": "8836"
        }
      },
      {
        "cvv": 892,
        "issuer": "CITIZENS SECURITY BANK AND TRUST COMPANY",
        "id": "d311e9d0-f410-4f75-a21f-f14125c88cbb",
        "number": "4127737519045634",
        "expiration": "12/2030",
        "brand": "visa",
        "number_alt": {
          "masked": "************5634",
          "unmasked": "4127 7375 1904 5634",
          "last4": "5634"
        }
      },
      {
        "cvv": 524,
        "issuer": "CREDIT LIBANAIS S.A.L.",
        "id": "64113f4d-c625-43d2-9d82-04f220c9e26f",
        "number": "4741441509416816",
        "expiration": "12/2030",
        "brand": "visa",
        "number_alt": {
          "masked": "************6816",
          "unmasked": "4741 4415 0941 6816",
          "last4": "6816"
        }
      }
    ],
    "owner": {
      "name": "Benny Swaniawski",
      "address": {
        "street": "007 Nelson Mountains",
        "city": "Margueriteton",
        "state": "Washington",
        "zipCode": "39956-7950"
      },
      "avatar": "https://storage.googleapis.com/apiverve/APIResources/faces/Male/30-40/12345678.jpg?X-Goog-Signature=..."
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive Test Card Generator form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — Test Card Generator API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1