> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stateset.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create an invoice

> Create an invoice

<Warning>
  **Confirm your deployment before running this request.** This page describes an API contract;
  a published reference does not establish hosted availability. Check the dated
  [host report](/api-reference/hosts) and obtain your deployment URL and credentials.
  Replace the example host if your provisioned service uses a different URL.
</Warning>

### Headers

<ParamField header="Idempotency-Key" type="string,null">
  Optional client-generated key. Replaying the same key with an identical body returns the original response without creating a duplicate; reusing it with a different body returns 422. Scoped per tenant.
</ParamField>

### Request body

`CreateInvoiceRequest`

<ParamField body="currency" type="string,null" />

<ParamField body="customer_id" type="string (uuid)" required />

<ParamField body="due_date" type="string,null" />

<ParamField body="invoice_type" type="string,null" />

<ParamField body="notes" type="string,null" />

<ParamField body="order_id" type="string,null (uuid)" />

<ParamField body="payment_terms" type="string,null" />

### Response

`InvoiceResponse`

<ResponseField name="amount_paid" type="string" required />

<ResponseField name="balance_due" type="string" required />

<ResponseField name="created_at" type="string (date-time)" required />

<ResponseField name="currency" type="string" required />

<ResponseField name="customer_id" type="string (uuid)" required />

<ResponseField name="due_date" type="string (date-time)" required />

<ResponseField name="id" type="string (uuid)" required />

<ResponseField name="invoice_date" type="string (date-time)" required />

<ResponseField name="invoice_number" type="string" required />

<ResponseField name="invoice_type" type="string" required />

<ResponseField name="order_id" type="string,null (uuid)" />

<ResponseField name="status" type="string" required />

<ResponseField name="subtotal" type="string" required />

<ResponseField name="tax_amount" type="string" required />

<ResponseField name="total" type="string" required />

<ResponseField name="updated_at" type="string (date-time)" required />

### Status codes

| Code | Meaning |
| - | - |
| `201` | Invoice created |
| `400` | Invalid request |
| `422` | Idempotency-Key reused with a different body |

### Using this contract

Read the [source OpenAPI document](/spec/stateset-icommerce.json) for declared schemas and alternatives.
This page also includes documented corrections from the [spec overlays](https://github.com/stateset/docs/tree/main/spec/overlays).
Example IDs and values are illustrative; replace them with records from your workspace.

<RequestExample>
  ```bash cURL theme={null}
  curl --silent --show-error --fail-with-body --request POST \
    --url 'https://api.stateset.com/api/v1/invoices' \
    --header "Authorization: Bearer $STATESET_API_KEY" \
    --header "Idempotency-Key: ${IDEMPOTENCY_KEY:?Set a unique key for this operation; preserve it on retries}" \
    --header 'Content-Type: application/json' \
    --data '{
    "currency": "USD",
    "customer_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "due_date": "2026-08-31T14:22:05Z",
    "invoice_type": "string",
    "notes": "Two-person tent, green — replacement for damaged pole set.",
    "order_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "payment_terms": "string"
  }'
  ```
</RequestExample>

<ResponseExample>
  ```json 201 theme={null}
  {
    "amount_paid": "string",
    "balance_due": "string",
    "created_at": "2026-08-31T14:22:05Z",
    "currency": "USD",
    "customer_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "due_date": "2026-08-31T14:22:05Z",
    "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "invoice_date": "2026-08-31T14:22:05Z",
    "invoice_number": "ORD-10042",
    "invoice_type": "string",
    "order_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "status": "pending",
    "subtotal": "98.00",
    "tax_amount": "4.12",
    "total": "102.12",
    "updated_at": "2026-08-31T14:22:05Z"
  }
  ```
</ResponseExample>


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