# Zoho Invoice — Lua API Reference

## Common Workflows

### Create an invoice for a customer

```lua
-- Step 1: Find the customer
local contacts = app.integrations.zoho_invoice.list_contacts({
    search_text = "Acme Corp"
})
local customer_id = contacts.contacts[1].contact_id

-- Step 2: Find items to add
local items = app.integrations.zoho_invoice.list_items({
    search_text = "Consulting"
})
local item_id = items.items[1].item_id

-- Step 3: Create the invoice
local invoice = app.integrations.zoho_invoice.create_invoice({
    customer_id = customer_id,
    line_items = {
        {
            item_id = item_id,
            quantity = 10
        }
    },
    date = "2025-01-15",
    due_date = "2025-02-15",
    notes = "Thank you for your business!"
})

print("Invoice created: " .. invoice.invoice.invoice_id)
print("Total: " .. invoice.invoice.total)
```

### List overdue invoices

```lua
local result = app.integrations.zoho_invoice.list_invoices({
    status = "overdue",
    sort_column = "date",
    sort_order = "ascending"
})

for _, inv in ipairs(result.invoices) do
    print(inv.invoice_number .. " - " .. inv.customer_name .. " - " .. inv.balance)
end
```

### Get payments for a date range

```lua
local payments = app.integrations.zoho_invoice.list_payments({
    date_start = "2025-01-01",
    date_end = "2025-01-31"
})

local total = 0
for _, payment in ipairs(payments.payments) do
    total = total + tonumber(payment.amount)
    print(payment.date .. " - " .. payment.customer_name .. " - " .. payment.amount)
end
print("Total received: " .. total)
```

### Check your connection

```lua
local user = app.integrations.zoho_invoice.get_current_user({})
print("Connected as: " .. user.user.name .. " (" .. user.user.email .. ")")
```

## Invoice Statuses

| Status | Description |
|--------|-------------|
| `draft` | Invoice is in draft state |
| `sent` | Invoice has been sent to the customer |
| `overdue` | Payment is past the due date |
| `paid` | Invoice has been fully paid |
| `void` | Invoice has been voided |
| `partially_paid` | Invoice has been partially paid |

## Contact Types

| Type | Description |
|------|-------------|
| `customer` | Customer contacts |
| `vendor` | Vendor contacts |

## Item Types

| Type | Description |
|------|-------------|
| `goods` | Physical products |
| `service` | Service items |

## Line Item Format

When creating invoices, each line item should include:

```lua
{
    item_id = "1234567890",   -- Required: use item_id from list_items, or provide name + rate
    quantity = 1,             -- Quantity (default: 1)
    rate = 100.00,            -- Override rate (optional if item_id has a default rate)
    description = "Custom description"  -- Optional override
}
```

Alternatively, create line items without an existing item:

```lua
{
    name = "Custom Service",
    description = "One-time custom work",
    rate = 150.00,
    quantity = 5
}
```

## Pagination

All list endpoints support `page` and `per_page` parameters:

```lua
local result = app.integrations.zoho_invoice.list_invoices({
    page = 2,
    per_page = 50
})
```

## Multi-Account Usage

If you have multiple Zoho Invoice accounts configured, use account-specific namespaces:

```lua
-- Default account (always works)
app.integrations.zoho_invoice.list_invoices({})

-- Explicit default (portable across setups)
app.integrations.zoho_invoice.default.list_invoices({})

-- Named accounts
app.integrations.zoho_invoice.work.list_invoices({})
app.integrations.zoho_invoice.personal.list_invoices({})
```

All functions are identical across accounts — only the credentials differ.

## Notes

- The Organization ID is required for most API calls. Set it in the integration settings.
- Date formats use ISO 8601 (YYYY-MM-DD).
- The base URL varies by region — make sure to configure the correct one for your Zoho account.
- Rate limits: 100 requests per minute per organization.