Lookup email

Check if user exists on Link network

Quick example: https://loginwithlink.com/api/lookup-email?email=[e-mail]&STRIPE_PUBLIC_KEY=pk_live_51JocsEAGmp0k5LnwNUl7SJzZMhMMcMJ4X4PWg928nJLm5ocPpzHLhBOBMbTLBrXPYdkepbg9HX0AJFY8ixt2bXTV00vg5Ja3DP <- That uses my public key — please use your own once you get the idea!

Request

This is a GET request.

GET https://loginwithlink.com/api/lookup-email

Include the following query parameters

Parameter	Example
email	[e-mail]
STRIPE_PUBLIC_KEY	pk_live_51JocsEAGmp0k5LnwNUl7SJzZMhMMcMJ4X4PWg928nJLm5ocPpzHLhBOBMbTLBrXPYdkepbg9HX0AJFY8ixt2bXTV00vg5Ja3DP

In total, your request will look like this

GET 
https://loginwithlink.com/api/lookup-email?email=[e-mail]&STRIPE_PUBLIC_KEY=pk_live_51JocsEA_YOUR_KEY_HERE

e.g., if using `fetch`, you might compose a request like so:

const url = "https://loginwithlink.com/api/lookup-email";
const queryParams = {
  email: "[e-mail]",
  STRIPE_PUBLIC_KEY: "pk_live_51JocsEAGmp0k5LnwNUl7SJzZMhMMcMJ4X4PWg928nJLm5ocPpzHLhBOBMbTLBrXPYdkepbg9HX0AJFY8ixt2bXTV00vg5Ja3DP"
};

const queryString = Object.entries(queryParams)
  .map(([key, value]) => `${encodeURIComponent(key)}=${encodeURIComponent(value)}`)
  .join("&");

const fullUrl = `${url}?${queryString}`;

fetch(fullUrl)
  .then(response => response.json())
  .then(data => {
    // Handle the response data here
    console.log(data);
  })
  .catch(error => {
    // Handle any errors that occur during the fetch request
    console.error(error);
  });

Response

The response will look something like this, if a match is found:

{
  "result": "success",
  "parametersSubmitted": {
    "email": "[e-mail]",
    "STRIPE_PUBLIC_KEY": "pk_live_51JocsEAGredacted [you provided in your request]"
  },
  "userExistsOnLink": true, // or false, if user not found on Link
  "client_secret": "ABCD1234redacted" // Keep this handy; you'll need to re-submit in the final step
  "redacted_phone_number": "+3*********90" // you may wish to display this: "SMS has been sent to…"
}

You will see "userExistsOnLink": false if user is not found on Link.