• VALIDATION
  • SECURITY
  • AUTOMATION
  • HUMAN

How to test payment flows with fake data with your AI

Connect the Faker Data Generator to your AI client to produce valid-format financial strings for testing. You can instantly populate test databases or checkout forms with realistic data.

Ask AI about this page

Short answer

How can I generate fake credit cards and IBANs for testing?

Your AI uses the generate_fake_data tool to create valid-format credit card numbers and IBANs on demand. This allows you to run full checkout simulations without risking real financial data. You'll find the specific steps and prompts below.

Testing outcomes

What you get from these tests

The AI handles the data generation so you can focus on your code.

VALIDATION

Format-perfect strings

The AI produces numbers that pass Luhn algorithms and IBAN checksums. You get data that actually works in your test environment.

SECURITY

Zero real data risk

Since every piece of information is synthetic, you avoid the headache of handling PII or real credit card details during development.

AUTOMATION

Bulk test sets

Instead of typing one number at a time, your agent can generate hundreds of unique entries for stress testing your database or API.

HUMAN

Manual review needed

The AI generates the data, but you still need to manually verify that your specific application logic handles the edge cases correctly.

The workflow

What your AI does when the data request arrives.

The AI handles the heavy lifting of generating complex strings so you can focus on the logic.

  1. Identify requirements

    Your agent analyzes your request to determine which specific financial formats are needed for your test case.

    generate_fake_data

  2. Generate synthetic strings

    The AI calls the tool to create valid credit card numbers and IBANs that match the requested patterns.

    generate_fake_data

  3. Format for output

    The agent organizes the raw data into a clean list, JSON object, or CSV format based on your instructions.

    generate_fake_data

  4. Deliver to client

    The generated data is sent directly back to your chat interface or your local development environment.

    generate_fake_data

Try it

Copy these to start.

Use these prompts to get moving immediately.

Starting points

These are just ideas. Swap out the specific formats or quantities to match what your code actually needs.

@faker-js/faker Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_CTzJjCmk264uBluTZjtIqeypJHp2eMZQBTrUEe43/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — @faker-js/faker capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "faker-data-generator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_CTzJjCmk264uBluTZjtIqeypJHp2eMZQBTrUEe43/mcp"
    }
  }
}
Copy into chat04

  • Generate 10 valid-format credit card numbers for a checkout test.

  • I need a list of 5 IBANs to test my European payment gateway logic.

  • Create a JSON object containing 3 fake users with valid credit card numbers and expiration dates.

  • Give me a single valid IBAN for testing a bank transfer flow.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect Faker Data Generator once, then ask.

Just click the link to connect the MCP to your preferred client. Your credentials stay encrypted, and you can start generating data immediately.

Connect Faker Data Generator to your AI

FAQ

How this task behaves

  • 01

    Are these credit card numbers real?

    No. The AI generates synthetic numbers that follow the correct mathematical patterns, but they are not linked to real accounts.

  • 02

    Can the AI use this data to make real purchases?

    No. The data is purely for testing format and logic. It will not work for actual financial transactions.

  • 03

    Can the AI write this data directly into my database?

    No. The AI can generate the data and provide it to you in a format like JSON or CSV, but you must handle the actual database insertion yourself.

  • 04

    Does the AI know my real credit card info?

    No. The AI has no access to your personal financial information; it only generates new, fake data based on your request.

  • 05

    Can I request specific card brands like Visa or Mastercard?

    Yes, you can specify the brand in your prompt, and the AI will attempt to generate numbers that match those specific patterns.

  • More questions about Faker Data Generator? The Connector page answers them. See everything the Faker Data Generator Connector can do

Connect @faker-js/faker to Claude, Cursor, ChatGPT & more