How Do I Find My REST API key?

If you're integrating your LeadSimple account with a third-party application, you’ll need your REST API key to establish the connection.

The LeadSimple REST API allows you to build custom integrations, automate workflows, and programmatically access your account data — including deals, contacts, pipelines, processes, conversations, and reports.

This guide walks you through how to request access, locate your API key, and get started.

REST API access is not enabled by default. Before you can generate an API key or make any requests, you’ll need to have this feature activated on your account.

🔒 Important
Please complete this step first.

Email support@leadsimple.com to request REST API access to be enabled on your account. Once the team confirms it has been enabled, you can proceed with the steps below.

Once access has been enabled, you can find your API key directly within your LeadSimple account.

Step 1: Log in
Go to app.leadsimple.com and sign in to your account.

Step 2: Open Settings
Click Settings in the left-hand navigation menu.

Step 3: Go to Integrations
Within Settings, select Integrations. Scroll down until you see the REST API card labeled:
​“Build custom integrations and automate workflows with our REST API.”

Step 4: Open API Documentation
Click on the REST API card. This will take you to the API documentation page:
​https://app.leadsimple.com/api_docs

Step 5: Copy Your API Key
At the top of the page, you’ll see a field labeled “Your API Key Is:” with your key already generated. Copy and store it securely.

⚠️ Keep Your API Key Secure
Treat your API key like a password. Do not share it publicly, include it in source control, or expose it in client-side code. If you believe your key has been compromised, please contact support@leadsimple.com immediately.