🚀Invoice Ninja

Updated 2 weeks ago by Jonas

GETTING STARTED GUIDE: How to set up a new connection?
ALL FEATURES EXPLAINED: All our features/functionality explained in detail - no app-specifics.

Invoice Ninja is a free, open-source solution for invoicing & billing customers. With Invoice Ninja, users can easily create and send professional invoices from any internet-enabled device. Clients can print invoices or download them as pdf files as well as pay online from within the system.

Below you'll find detailed information, specifically for Invoice Ninja integrations:

Supported Invoice Ninja Integrations

Authorizing Invoice Ninja

To authorise, simply follow the steps as described below. We need your API Token.

More info about Invoice Ninja Pricing can be found here


If you already authorized Invoice Ninja account(s) in the past or in any other PieSync integration, you'll be able to skip the first part of the authorization and choose from your CONNECTED ACCOUNTS.

[IF] Supported Conditions/Filters

  • BALANCE
  • PAID TO DATE
  • IS ARCHIVED / NOT ARCHIVED
  • FIELD VALUES (INCLUDING CUSTOM FIELDS)
  • ALREADY EXISTING IN APP YOU SYNC WITH 

[THEN] Supported Actions

  • UPDATING FIELD VALUES (INCLUDING CUSTOM FIELDS)

Default Field Mapping

Depending on the other app you're syncing with, you'll see a number of standard Invoice Ninja fields being mapped by default. For instance, in a connection with Google Contacts, the default field mapping looks like this:

PieSync syncs the default name field(s) that come with the apps. Sometimes they have a different structure in both apps you connect. E.g. first and last names are separate in app A and joint in a single field in app B. In the background, PieSync joins first and last names together from app A to B and separates them again from app B to A. Our algorithm is smart about which part it updates in app B.

Note that the "Client name" field can't be modified through a third-party and therefore only syncs one-way (→). More in-depth information can be found here.  

Customizable Field Mapping

You can custom map your Invoice Ninja Custom Fields and any additional standard fields that aren't included in the default mapping yet. Bear in mind a mapping between two fields can only exist if the types of fields are compatible, and the particular compatibility will determine the direction of the mapping as well. More information on Customizable Field Mapping here.

Additional Options

Syncing Deletions

Currently, there are no Invoice Ninja integrations on the PieSync platform that support our deletions sync.

Syncing Unsubscribes

Currently, there are no Invoice Ninja integrations on the PieSync platform that support our unsubscribes sync.

The availability to Sync Unsubscribes/Deletions is app and connection dependent. If the box (screenshots above) is not there to tick, it's simply not possible. We need to be able to detect unsubscribes/deletions on one side and at the same time be able to create add the tag 'PieSync Unsubscribes' or ‘PieSync Trash’ on the other side. More Information on Syncing Unsubscribes here or on Deletions here.

Thanks to the feedback we have already received, we created a list of popular apps that we’re going to work on very soon. By voting them up in our pipeline, YOU decide which connectors we’ll release first. If you don’t see your app on the list or need any further help, drop us a line - support@piesync.com.  Don't forget to read our blog for the latest in productivity, apps, and technology!

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