Invoice Ninja

Add a new client record to Invoice Ninja with contact details, currency, and payment terms in one step.

Remove a client record from Invoice Ninja permanently, typically after data-retention cleanup or duplicate consolidation.

Fetch a single Invoice Ninja client record by ID, returning contact details, balance, and payment settings.

Retrieve the full list of Invoice Ninja clients, useful for bulk reporting, syncing, or overdue-balance sweeps.

Log a billable or non-billable expense in Invoice Ninja with vendor, amount, category, and optional client attribution.

Remove an expense record from Invoice Ninja, typically to correct an accidental duplicate or erroneous entry.

Retrieve a single Invoice Ninja expense record by ID, returning vendor, amount, category, and client attribution.

Fetch the complete expense ledger from Invoice Ninja for reporting, reconciliation, or client billback rollups.

Generate a new Invoice Ninja invoice for a client with line items, due date, and tax settings in one action.

Permanently remove a draft or cancelled invoice from Invoice Ninja to keep the ledger accurate.

Send an existing Invoice Ninja invoice to the client's billing email with a single action, using Invoice Ninja's built-in email template.

Fetch a single Invoice Ninja invoice by ID, returning status, line items, due date, and payment history.

Retrieve every Invoice Ninja invoice for reporting, reconciliation, or scanning overdue and unpaid balances.

Record a payment against an Invoice Ninja invoice, marking it paid and updating the client's outstanding balance.

Remove a payment record from Invoice Ninja, typically to reverse an error or process a chargeback.

Fetch a single payment record from Invoice Ninja, returning amount, date, method, and the invoice it applies to.

Retrieve all Invoice Ninja payment records for cash-flow reporting, reconciliation, or revenue recognition.

Generate a new Invoice Ninja quote for a prospect with itemised line items, expiry date, and branding applied.

Remove a quote from Invoice Ninja, typically to retire an expired or superseded proposal.

Send an Invoice Ninja quote to the prospect's email address using Invoice Ninja's built-in quote delivery.

Fetch a single Invoice Ninja quote by ID, returning status, line items, expiry date, and client details.

Retrieve every Invoice Ninja quote for pipeline reporting, expiry sweeps, or conversion-rate analysis.

Log a billable time-tracking task in Invoice Ninja tied to a client and project, with duration and description.

Remove a time-tracking task from Invoice Ninja to correct an erroneous entry or purge non-billable logged time.

Fires when an invoice is emailed to a client from Invoice Ninja, marking the start of the payment-due window.

Fires when an invoice's status changes to paid in Invoice Ninja, signalling a completed payment from the client.

Fires when a client opens the invoice portal link, confirming they have seen the invoice and prompting timely follow-up.

Fires when a client approves a quote in the Invoice Ninja client portal, signalling a firm commitment to proceed.

Fires when a new payment is recorded in Invoice Ninja — whether via portal, API, or manual entry — updating the invoice balance.

Fires when Invoice Ninja auto-generates a recurring invoice on schedule, before it is sent to the client.

Fires when a credit note is applied to a client account in Invoice Ninja, reducing their outstanding balance.

Fires when a new expense record is created in Invoice Ninja, whether by API, manual entry, or receipt import.