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In a Nutshell

OAuth2 Client Credentials Grant

The Lucca API implements Client Credentials grant from the OAuth 2.0 authorization protocol].

Access Through OAuth Scopes

OAuth scopes are a mechanism to limit an application’s access to the resources of the API. When declaring the application, you can select the scopes given to it. Then, when attempting to retrieve an access_token for this application, you may request one, several or all of these scopes.

Access is also limited through listing business-establishments when declaring your application.

The list of scopes can be found in the Lucca API reference.

Authentication URL

Generating access tokens is handled through a single global endpoint for ALL Lucca accounts: accounts.world.luccasoftware.com. Then, API requests may be sent to your dedicated environment.

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Authentication Steps

First, connect to the environment you want to connect to.

1

Declaring Your Client Application

Authentication requires your code / app to generate an access token from the Lucca API.

For this, please login to your Lucca account, then go to /identity/admin/integration-keys. You must have sufficient priviledges to access this page ; if you do not, then please contact your administrator.

Not sure about the complete URL? Find out more about environments.

You were given access to it? Great, this is where you can create client applications, and manage existing ones.

  1. Enter an email address. This will be our technical contact, and we will send emails whenever there’s a problem. You should definitely enter an alias (i.e. a “collective email address”), in order to always keep access to the emails.
  2. Give your application a name.
  3. List the OAuth scopes your application should be granted.
  4. List the business-establishments your application should have access to.

Once done, you get both a client_id and a client_secret. Save them! (especially the secret). And keep them secure. Both are needed for authenticating, and you won’t ever see the secret again. Tip: if you still lost the secret, you can generate a new one.

We highly recommend creating a new Client Application for every use-case on your side, in order to avoid giving too many scopes to a single app. This reduces the risk of a token leaks.

As you may have already noticed, access rights management is less granular than when managing users’ access rights. So keep your client_secret and access_tokens secure.



2

Obtaining an Access Token

Once your Client Application is created and you were given a secret, you must exchange both the client_id and the client_secret to the authorize endpoint to be given an authentication token.

The Host is NOT the usual domain of your Lucca account, but rather a single global one: accounts.world.luccasoftware.com.

Content-Type is application/x-www-form-urlencoded and NOT the usual JSON.

The list of scopes is space (” ”) delimited.

POST /connect/token HTTPS/1.1
Host: accounts.world.luccasoftware.com
Content-Type: application/x-www-form-urlencoded

client_id=xxx
&client_secret=xxx
&scope=leaves.readwrite leave-requests.readonly
&grant_type=client_credentials
Run in Hoppscotch

If the request was formatted correctly, the server would respond with the following JSON-encoded payload:

Status: 200 OK
Content-Type: application/json; charset=utf-8
...
{
    "token_type":"bearer",
    "access_token":"XXX...",
    "expires_in": 1800
}

Access tokens expire after 30 minutes (1,800 seconds). It is considered good practice to request a new access token for each integration flow.



3

Using the Access Token

The given token may be used to issue requests to API endpoints. Forge a normal HTTPS request and include it in the Authorization HTTP header:

GET /lucca-api/leaves HTTPS/1.1
Host: example.ilucca.net
content-type: application/json; charset=utf-8 
Authorization: Bearer XXX...
Api-Version: XXX

API requests should be sent to your own Lucca account Host (i.e. https://example.ilucca.net). Refer to the environments documentation.

Using an incorrect or revoked token will result in 401 Unauthorized response.

Browse the API reference

Attempting to access endpoint with a token that is not granted the required OAuth scope will result in a 403 Forbidden response.

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