I’m a Developer

Step 1: Sign up

You need a LatLng.io account. You’ll need a valid email address for this. You can either signup online here or download the Android or iOS app. Make sure you have taken a note of your username and password.

---

Step 2: Log In

Full documentation for the latlng.io API can be found here. In this step we are going to be making a http POST request to the API endpoint (If you wish you can actually call this endpoint from the documentation page without writing any code)

https://api.latlng.io/auth/login

Request

The body of the http POST request must contain the following payload. Replace user/password with your own credentials

{
  "username": "youremail@yourdomain.com",
  "password": "yourpassword"
}

Response

A successful response will return a status code of 200 with a payload similar to the following:

{
  "id": "425cf691-e004-44b1-b82a-bd1ae2d1c2c0",
  "subType": "SU",
  "name": "youremail@yourdomain.com",
  "expires": "3000-01-13T09:51:23.000Z",
  "ext": {
    "i18n": {
      "distance_units": "mile"
    },
    "username": "youremail",
    "last_login": "2025-09-20T08:21:50.078Z"
  }
}

The http headers will contain a SetCookie directive, the connect.sid must be passed on all subsequent requests

connect.sid=somelongstringofcookie; Path=/;SameSite=none;Secure

Step 3 – Log Out

In this step we are going to be making a http POST request to the API endpoint (If you wish you can actually call this endpoint from the documentation page without writing any code)

https://api.latlng.io/users/logout

Request

The payload of this request will be empty but you must ensure the Cookie from Step 2 is passed in the http header

Response

A successful response will return a status code of 200 with an empty payload. Note that after the logout request, the cookie will be invalidated.

---