Hubspot

Step 1: In your account, click the settings icon in the main navigation bar.

Step 2: In the left sidebar menu, navigate to Integrations > API key

• If a key has never been generated for your account, clickGenerate API key

• If you’ve already generated an API key, click Show to display your key

• Click Copy to copy the key. You can then paste the key to provide it to use it in your applications

More info:

https://knowledge.hubspot.com/integrations/how-do-i-get-my-hubspot-api-key