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You need an active Fastbill account to access the API.

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Finding Your API Credentials

To connect Fastbill with StackOne, you’ll need your account email address and API key.

1

Sign in to Fastbill

Sign in to your Fastbill account.

2

Open Settings

Navigate to your account settings.

  • Click on your name or avatar in the upper right corner
  • Select Einstellungen (Settings)
3

Locate Your API Key

Find your API key at the bottom of the Settings page.

  • Scroll down to the bottom of the Settings page
  • Your API key is displayed in the API-Key section
  • Copy the API key and store it securely for use later
4

Note Your Email Address

Use the same email address you use to log in to Fastbill.

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Linking the Account from the Hub

1

Navigate to the Hub

Use one of the three Linking Account Methods to access the Hub.
2

Fill out the fields

Fill out the following fields using details from your provider:
  • Email Address
  • API Key
3

Connect

  • Click Connect
  • If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider’s authorization flow.
  • Once authorization is successful, you will see a confirmation popup

If the account linking is successful, you will see the newly linked account in your Accounts page.