• SUCCESS
  • FAILURE
  • VERIFIED
  • HUMAN

How to test user authentication flows with your AI

Connect Reqres to your AI client to run automated identity checks. Once connected, your agent can trigger real API calls to validate your auth logic.

Ask AI about this page

Short answer

How can I test auth flows with my AI?

Your AI uses the Reqres Demo API to execute registration, login, and magic link sequences. You get a direct way to verify if your identity logic holds up against real API responses.

Test outcomes

Validation results

What your agent finds when running auth tests.

SUCCESS

Valid credentials

The AI confirms that registration and login calls return the expected tokens. You get proof that the identity flow works.

FAILURE

Auth errors caught

Your agent identifies when incorrect credentials or expired links trigger errors. This highlights flaws in your logic.

VERIFIED

Magic link status

The AI checks the lifecycle of a magic link from request to verification. You see if the link flow is actually functional.

HUMAN

Manual review needed

If the API returns unexpected data structures, your agent flags it for you. You decide how to fix the underlying code.

The workflow

What your AI does when the request arrives.

The AI acts as the client interacting with the Reqres API.

  1. Create new users

    Your agent sends registration data to the API to set up test accounts.

    register_demo

  2. Validate credentials

    The AI attempts to log in using the newly created user details.

    login_demo

  3. Trigger magic links

    Your agent requests a passwordless login link to test the email flow.

    request_magic_link

  4. Confirm verification

    The AI completes the process by verifying the magic link is valid.

    verify_magic_link

Try it

Copy these to start.

Use these prompts to kick off your testing.

Starting points

Swap the bracketed details for your specific test data like email addresses or passwords.

Reqres Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_AtxnuBtQ26tiOA6pBRuixOGykiHBrl8ytWq6813r/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 — Reqres capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "reqres-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_AtxnuBtQ26tiOA6pBRuixOGykiHBrl8ytWq6813r/mcp"
    }
  }
}
Copy into chat04

  • Register a new user with the email testuser@example.com and check the response.

  • Try logging in with the credentials I just created to see if I get a token.

  • Request a magic link for my test account and then try to verify it.

  • Run a full auth test: register a user, log them in, and verify the magic link flow.

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

Start here

Connect Reqres once, then ask.

You only need to link the MCP once. Your credentials stay encrypted, and you can immediately start testing auth flows in any compatible client.

Connect Reqres to your AI

FAQ

Common questions

  • 01

    Can the AI create real users in my production database?

    No. This MCP only interacts with the Reqres Demo API for testing purposes.

  • 02

    Does the AI handle the magic link email delivery?

    No. The AI triggers the request and verifies the link via the API, but it does not access your actual email inbox.

  • 03

    Can I use this to test my own custom API?

    No. This specific Connector is built exclusively for the Reqres Demo API.

  • 04

    Will the AI automatically fix my code if an auth test fails?

    No. The AI reports the failure and the API response, but you must perform the actual code changes.

  • 05

    Can the AI delete users after testing?

    No. The available tools only support registration, login, and magic link actions.

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

Connect Reqres to Claude, Cursor, ChatGPT & more