If you're integrating your LeadSimple account with Zapier, you'll need your API key to establish a connection.
Your Zapier API key can be found under Settings > Integrations, select the Zapier Integration.
Then, at the top of the Zapier ta,b you will see the Zapier API Key :
Click the "Copy" button and paste it into Zapier.
(This API Key is only valid for Zapier)