LASSO REST API – Tip Sheet
Two Swagger URLs
Workforce
Financial Mgmt. & Inventory
Taking the API for a spin…
Give it a try, fetch a list of airports. We recommend using Postman to make these test calls. The Swagger “Try” feature currently does not work properly in the Workforce Swagger documentation.
Note, cURL examples in the Workforce Swagger documentation are missing a portion of the correct url, “api/v1”. Please be sure your URL contains these values as shown in the following API URL examples.
https:// {your-LASSO-subdomain}.api.lasso.io/api/v1/airports
If your credentials or the URL are incorrect, you may receive HTML back (see screenshot). When these two items are correct, you will always receive a JSON payload.
Financial Mgmt & Inventory API URL example:
https:// {your-LASSO-subdomain}.api.lasso.io/api/nx/v1/invoices
Notes:
Observe the difference in the API base URL between Workforce and Financial Mgmt & Inventory.
The same API key is valid for both sets of API calls.
Keys to Success in Postman:
Use API Key as the Auth Type
Make sure you have LASSO-APIKEY as the Key
Paste the API key provided by LASSO in the “Value” field.
Additional Tips:
Regarding the event creation, try to add these two fields to your payload:
hide_client | boolean |
hide_name | boolean |
These settings will hide the client name and/or the event name when inviting crew.


