### Add/Update Subscription

Source: https://linked2checkout.com/docs/3.1/introduction

Manages customer subscriptions. This allows for recurring billing setups.

```APIDOC
## POST /websites/linked2checkout_3_1/subscription

### Description
Adds or updates a customer subscription. This endpoint facilitates the setup and management of recurring billing.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/subscription

### Parameters
#### Request Body
- **customer_id** (string) - Required - The ID of the customer subscribing.
- **plan_id** (string) - Required - The ID of the subscription plan.
- **start_date** (string) - Required - The date the subscription begins (YYYY-MM-DD).
- **billing_interval** (string) - Required - The frequency of billing (e.g., 'monthly', 'yearly').
- **billing_amount** (number) - Required - The amount to be billed per interval.
- **next_billing_date** (string) - Optional - The date of the next scheduled billing (YYYY-MM-DD).

### Request Example
```json
{
  "customer_id": "cust_12345xyz",
  "plan_id": "plan_basic_monthly",
  "start_date": "2024-02-01",
  "billing_interval": "monthly",
  "billing_amount": 25.00,
  "next_billing_date": "2024-03-01"
}
```

### Response
#### Success Response (200)
- **subscription_id** (string) - The unique identifier for the created or updated subscription.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "subscription_id": "sub_abcdef123",
  "message": "Subscription created successfully."
}
```
```

--------------------------------

### Get Customer

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves the details of a specific customer using their unique identifier.

```APIDOC
## GET /websites/linked2checkout_3_1/customer/{customer_id}

### Description
Retrieves the details of a specific customer based on their unique customer ID.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/customer/{customer_id}

### Parameters
#### Path Parameters
- **customer_id** (string) - Required - The unique identifier of the customer.

### Response
#### Success Response (200)
- **customer_id** (string) - The unique identifier of the customer.
- **first_name** (string) - The customer's first name.
- **last_name** (string) - The customer's last name.
- **email** (string) - The customer's email address.
- **phone_number** (string) - The customer's phone number.
- **notification_preference** (string) - The customer's preferred notification method.
- **created_at** (string) - The timestamp when the customer was created.

#### Response Example
```json
{
  "customer_id": "cust_12345xyz",
  "first_name": "Jane",
  "last_name": "Doe",
  "email": "jane.doe@example.com",
  "phone_number": "+15551234567",
  "notification_preference": "both",
  "created_at": "2024-01-10T14:00:00Z"
}
```
```

--------------------------------

### Get Customers

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves a list of customers, with options to filter by email or phone number.

```APIDOC
## GET /websites/linked2checkout_3_1/customers

### Description
Retrieves a list of customers. Filters can be applied to narrow down the results.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/customers

### Parameters
#### Query Parameters
- **email** (string) - Optional - Filter customers by email address.
- **phone_number** (string) - Optional - Filter customers by phone number.
- **limit** (integer) - Optional - The maximum number of customers to return.
- **offset** (integer) - Optional - The number of customers to skip.

### Response
#### Success Response (200)
- **customers** (array) - A list of customer objects.
  - Each customer object contains: **customer_id**, **first_name**, **last_name**, **email**, **phone_number**, **notification_preference**, **created_at**.

#### Response Example
```json
{
  "customers": [
    {
      "customer_id": "cust_12345xyz",
      "first_name": "Jane",
      "last_name": "Doe",
      "email": "jane.doe@example.com",
      "phone_number": "+15551234567",
      "notification_preference": "both",
      "created_at": "2024-01-10T14:00:00Z"
    },
    {
      "customer_id": "cust_67890uvw",
      "first_name": "John",
      "last_name": "Smith",
      "email": "john.smith@example.com",
      "phone_number": "+15559876543",
      "notification_preference": "email",
      "created_at": "2023-11-20T11:00:00Z"
    }
  ]
}
```
```

--------------------------------

### Get Subscription

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves the details of a specific subscription using its unique identifier.

```APIDOC
## GET /websites/linked2checkout_3_1/subscription/{subscription_id}

### Description
Retrieves the details of a specific subscription based on its unique subscription ID.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/subscription/{subscription_id}

### Parameters
#### Path Parameters
- **subscription_id** (string) - Required - The unique identifier of the subscription.

### Response
#### Success Response (200)
- **subscription_id** (string) - The unique identifier of the subscription.
- **customer_id** (string) - The ID of the customer.
- **plan_id** (string) - The ID of the subscription plan.
- **start_date** (string) - The start date of the subscription.
- **billing_interval** (string) - The frequency of billing.
- **billing_amount** (number) - The amount billed per interval
```

--------------------------------

### Get Invoices

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves a list of invoices, with options to filter by site, customer, or status.

```APIDOC
## GET /websites/linked2checkout_3_1/invoices

### Description
Retrieves a list of invoices. Filters can be applied to narrow down the results.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/invoices

### Parameters
#### Query Parameters
- **site_id** (string) - Optional - Filter invoices by site ID.
- **customer_id** (string) - Optional - Filter invoices by customer ID.
- **status** (string) - Optional - Filter invoices by status (e.g., 'paid', 'unpaid', 'overdue').
- **limit** (integer) - Optional - The maximum number of invoices to return.
- **offset** (integer) - Optional - The number of invoices to skip.

### Response
#### Success Response (200)
- **invoices** (array) - A list of invoice objects.
  - Each invoice object contains: **invoice_id**, **site_id**, **customer_id**, **amount**, **currency**, **due_date**, **status**, **created_at**.

#### Response Example
```json
{
  "invoices": [
    {
      "invoice_id": "inv_98765zyx",
      "site_id": "site_aabbccddeeff",
      "customer_id": "cust_12345xyz",
      "amount": 150.75,
      "currency": "USD",
      "due_date": "2024-12-31",
      "status": "unpaid",
      "created_at": "2024-01-15T10:30:00Z"
    },
    {
      "invoice_id": "inv_112233abc",
      "site_id": "site_aabbccddeeff",
      "customer_id": "cust_67890uvw",
      "amount": 75.00,
      "currency": "USD",
      "due_date": "2024-11-30",
      "status": "paid",
      "created_at": "2023-10-25T09:00:00Z"
    }
  ]
}
```
```

--------------------------------

### Get Invoice

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves the details of a specific invoice using its unique identifier.

```APIDOC
## GET /websites/linked2checkout_3_1/invoice/{invoice_id}

### Description
Retrieves the details of a specific invoice based on its unique invoice ID.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/invoice/{invoice_id}

### Parameters
#### Path Parameters
- **invoice_id** (string) - Required - The unique identifier of the invoice.

### Response
#### Success Response (200)
- **invoice_id** (string) - The unique identifier of the invoice.
- **site_id** (string) - The ID of the site associated with the invoice.
- **customer_id** (string) - The ID of the customer.
- **amount** (number) - The total amount of the invoice.
- **currency** (string) - The currency of the invoice.
- **due_date** (string) - The due date of the invoice.
- **status** (string) - The current status of the invoice (e.g., 'paid', 'unpaid', 'overdue').
- **created_at** (string) - The timestamp when the invoice was created.

#### Response Example
```json
{
  "invoice_id": "inv_98765zyx",
  "site_id": "site_aabbccddeeff",
  "customer_id": "cust_12345xyz",
  "amount": 150.75,
  "currency": "USD",
  "due_date": "2024-12-31",
  "status": "unpaid",
  "created_at": "2024-01-15T10:30:00Z"
}
```
```

--------------------------------

### Get Payment

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves the details of a specific payment using its unique identifier.

```APIDOC
## GET /websites/linked2checkout_3_1/payment/{payment_id}

### Description
Retrieves the details of a specific payment based on its unique payment ID.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/payment/{payment_id}

### Parameters
#### Path Parameters
- **payment_id** (string) - Required - The unique identifier of the payment.

### Response
#### Success Response (200)
- **payment_id** (string) - The unique identifier of the payment.
- **invoice_id** (string) - The ID of the invoice associated with the payment.
- **amount** (number) - The amount paid.
- **payment_method** (string) - The method used for payment.
- **transaction_id** (string) - The transaction ID from the payment provider.
- **payment_date** (string) - The date the payment was made.
- **status** (string) - The status of the payment (e.g., 'completed', 'refunded', 'voided').

#### Response Example
```json
{
  "payment_id": "pay_1a2b3c4d5e",
  "invoice_id": "inv_98765zyx",
  "amount": 150.75,
  "payment_method": "credit_card",
  "transaction_id": "txn_abcdef12345",
  "payment_date": "2024-01-20",
  "status": "completed"
}
```
```

--------------------------------

### Get Payments

Source: https://linked2checkout.com/docs/3.1/introduction

Retrieves a list of payments, with options to filter by invoice, payment method, or date range.

```APIDOC
## GET /websites/linked2checkout_3_1/payments

### Description
Retrieves a list of payments. Filters can be applied to narrow down the results.

### Method
GET

### Endpoint
/websites/linked2checkout_3_1/payments

### Parameters
#### Query Parameters
- **invoice_id** (string) - Optional - Filter payments by invoice ID.
- **payment_method** (string) - Optional - Filter payments by payment method.
- **start_date** (string) - Optional - Filter payments from this date (YYYY-MM-DD).
- **end_date** (string) - Optional - Filter payments up to this date (YYYY-MM-DD).
- **limit** (integer) - Optional - The maximum number of payments to return.
- **offset** (integer) - Optional - The number of payments to skip.

### Response
#### Success Response (200)
- **payments** (array) - A list of payment objects.
  - Each payment object contains: **payment_id**, **invoice_id**, **amount**, **payment_method**, **transaction_id**, **payment_date**, **status**.

#### Response Example
```json
{
  "payments": [
    {
      "payment_id": "pay_1a2b3c4d5e",
      "invoice_id": "inv_98765zyx",
      "amount": 150.75,
      "payment_method": "credit_card",
      "transaction_id": "txn_abcdef12345",
      "payment_date": "2024-01-20",
      "status": "completed"
    },
    {
      "payment_id": "pay_6f7e8d9c0b",
      "invoice_id": "inv_112233abc",
      "amount": 75.00,
      "payment_method": "bank_transfer",
      "transaction_id": "txn_ghijkl67890",
      "payment_date": "2023-10-25",
      "status": "completed"
    }
  ]
}
```
```

--------------------------------

### Add/Update Site

Source: https://linked2checkout.com/docs/3.1/introduction

Used to create or update a Site, representing a unique business location or merchant ID. Sites can belong to Site Groups and Site Enterprises but must belong to an Agency.

```APIDOC
## POST /websites/linked2checkout_3_1/onboarding/site

### Description
Creates or updates a Site. A Site represents a unique business location or merchant ID. It can belong to a Site Group and Site Enterprise, but must belong to an Agency.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/onboarding/site

### Parameters
#### Request Body
- **name** (string) - Required - The name of the Site.
- **agency_id** (string) - Required - The ID of the Agency this site belongs to.
- **group_id** (string) - Optional - The ID of the Site Group this site belongs to.
- **enterprise_id** (string) - Optional - The ID of the Site Enterprise this site belongs to.
- **description** (string) - Optional - A description for the Site.

### Request Example
```json
{
  "name": "Downtown Branch",
  "agency_id": "agn_112233",
  "group_id": "grp_67890def",
  "enterprise_id": "ent_12345abc",
  "description": "Main downtown business location."
}
```

### Response
#### Success Response (200)
- **site_id** (string) - The unique identifier for the created or updated Site.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "site_id": "site_aabbccddeeff",
  "message": "Site created successfully."
}
```
```

--------------------------------

### Add/Update Site Enterprise

Source: https://linked2checkout.com/docs/3.1/introduction

Allows for the creation and management of Site Enterprises, which can organize multiple Site Groups and Sites under a single entity.

```APIDOC
## POST /websites/linked2checkout_3_1/onboarding/site_enterprise

### Description
Creates or updates a Site Enterprise. Site Enterprises are optional and used to group multiple Site Groups and Sites.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/onboarding/site_enterprise

### Parameters
#### Request Body
- **name** (string) - Required - The name of the Site Enterprise.
- **description** (string) - Optional - A description for the Site Enterprise.

### Request Example
```json
{
  "name": "Example Enterprise",
  "description": "A top-level organization for multiple sites."
}
```

### Response
#### Success Response (200)
- **enterprise_id** (string) - The unique identifier for the created or updated Site Enterprise.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "enterprise_id": "ent_12345abc",
  "message": "Site Enterprise created successfully."
}
```
```

--------------------------------

### Refund Payment

Source: https://linked2checkout.com/docs/3.1/introduction

Initiates a refund for a previously made payment. This endpoint handles the process of returning funds to the customer.

```APIDOC
## POST /websites/linked2checkout_3_1/payment/refund

### Description
Initiates a refund for a payment. This endpoint processes the return of funds to the customer.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/payment/refund

### Parameters
#### Request Body
- **payment_id** (string) - Required - The ID of the payment to refund.
- **amount** (number) - Required - The amount to refund.
- **reason** (string) - Optional - The reason for the refund.

### Request Example
```json
{
  "payment_id": "pay_1a2b3c4d5e",
  "amount": 100.00,
  "reason": "Customer returned item."
}
```

### Response
#### Success Response (200)
- **refund_id** (string) - The unique identifier for the refund transaction.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "refund_id": "ref_fedcba54321",
  "message": "Refund processed successfully."
}
```
```

--------------------------------

### Add/Update Site Group

Source: https://linked2checkout.com/docs/3.1/introduction

Enables the creation and management of Site Groups, which can organize multiple Sites under a single entity. Site Groups are optional.

```APIDOC
## POST /websites/linked2checkout_3_1/onboarding/site_group

### Description
Creates or updates a Site Group. Site Groups are optional and can organize multiple Sites. They can optionally belong to a Site Enterprise.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/onboarding/site_group

### Parameters
#### Request Body
- **name** (string) - Required - The name of the Site Group.
- **enterprise_id** (string) - Optional - The ID of the Site Enterprise this group belongs to.
- **description** (string) - Optional - A description for the Site Group.

### Request Example
```json
{
  "name": "West Coast Group",
  "enterprise_id": "ent_12345abc",
  "description": "Group for all West Coast locations."
}
```

### Response
#### Success Response (200)
- **group_id** (string) - The unique identifier for the created or updated Site Group.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "group_id": "grp_67890def",
  "message": "Site Group created successfully."
}
```
```

--------------------------------

### Add/Update Customer

Source: https://linked2checkout.com/docs/3.1/introduction

Adds or updates customer information. This includes details necessary for sending payment requests and notifications.

```APIDOC
## POST /websites/linked2checkout_3_1/customer

### Description
Adds or updates customer information. This endpoint is used to manage customer details required for payment processing and communication.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/customer

### Parameters
#### Request Body
- **first_name** (string) - Required - The customer's first name.
- **last_name** (string) - Required - The customer's last name.
- **email** (string) - Required - The customer's email address.
- **phone_number** (string) - Optional - The customer's phone number.
- **notification_preference** (string) - Optional - Preferred notification method ('email', 'sms', 'both'). Defaults to 'email'.

### Request Example
```json
{
  "first_name": "Jane",
  "last_name": "Doe",
  "email": "jane.doe@example.com",
  "phone_number": "+15551234567",
  "notification_preference": "both"
}
```

### Response
#### Success Response (200)
- **customer_id** (string) - The unique identifier for the created or updated customer.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "customer_id": "cust_12345xyz",
  "message": "Customer created successfully."
}
```
```

--------------------------------

### Send Invoice

Source: https://linked2checkout.com/docs/3.1/introduction

Manually sends an existing invoice to the customer. This is useful if automatic notification was not triggered or needs to be resent.

```APIDOC
## POST /websites/linked2checkout_3_1/invoice/send

### Description
Manually sends an invoice to the customer. This endpoint can be used to resend an invoice or send it if automatic notification failed.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/invoice/send

### Parameters
#### Request Body
- **invoice_id** (string) - Required - The ID of the invoice to send.

### Request Example
```json
{
  "invoice_id": "inv_98765zyx"
}
```

### Response
#### Success Response (200)
- **message** (string) - A confirmation message indicating the invoice has been sent.

#### Response Example
```json
{
  "message": "Invoice sent successfully to the customer."
}
```
```

--------------------------------

### Add/Update Payment

Source: https://linked2checkout.com/docs/3.1/introduction

Records a payment made against an invoice. This can be used to mark an invoice as paid.

```APIDOC
## POST /websites/linked2checkout_3_1/payment

### Description
Records a payment transaction. This is typically used to mark an invoice as paid or to record a payment made outside the standard payment request flow.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/payment

### Parameters
#### Request Body
- **invoice_id** (string) - Required - The ID of the invoice this payment is for.
- **amount** (number) - Required - The amount paid.
- **payment_method** (string) - Required - The method used for payment (e.g., 'credit_card', 'bank_transfer', 'cash').
- **transaction_id** (string) - Optional - A unique identifier for the payment transaction from the payment provider.
- **payment_date** (string) - Optional - The date the payment was made (YYYY-MM-DD).

### Request Example
```json
{
  "invoice_id": "inv_98765zyx",
  "amount": 150.75,
  "payment_method": "credit_card",
  "transaction_id": "txn_abcdef12345",
  "payment_date": "2024-01-20"
}
```

### Response
#### Success Response (200)
- **payment_id** (string) - The unique identifier for the recorded payment.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "payment_id": "pay_1a2b3c4d5e",
  "message": "Payment recorded successfully."
}
```
```

--------------------------------

### Add/Update Invoice

Source: https://linked2checkout.com/docs/3.1/introduction

Adds or updates an invoice within the linked2checkout application. When an invoice is added, a payment request is automatically generated and the customer is notified.

```APIDOC
## POST /websites/linked2checkout_3_1/invoice

### Description
Adds or updates an invoice. Upon creation, a payment request is automatically generated and the customer is notified via text, email, or both based on their notification preferences.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/invoice

### Parameters
#### Request Body
- **site_id** (string) - Required - The ID of the site associated with this invoice.
- **customer_id** (string) - Required - The ID of the customer to whom the invoice is issued.
- **amount** (number) - Required - The total amount of the invoice.
- **currency** (string) - Required - The currency of the invoice (e.g., 'USD', 'EUR').
- **due_date** (string) - Required - The date the invoice is due (YYYY-MM-DD).
- **description** (string) - Optional - A description for the invoice.

### Request Example
```json
{
  "site_id": "site_aabbccddeeff",
  "customer_id": "cust_12345xyz",
  "amount": 150.75,
  "currency": "USD",
  "due_date": "2024-12-31",
  "description": "Monthly service fee"
}
```

### Response
#### Success Response (200)
- **invoice_id** (string) - The unique identifier for the created or updated invoice.
- **payment_request_id** (string) - The ID of the generated payment request.
- **message** (string) - A confirmation message.

#### Response Example
```json
{
  "invoice_id": "inv_98765zyx",
  "payment_request_id": "prq_abc123def",
  "message": "Invoice created and payment request generated."
}
```
```

--------------------------------

### Void Payment

Source: https://linked2checkout.com/docs/3.1/introduction

Voids a previously recorded payment. This is typically used for erroneous or fraudulent transactions.

```APIDOC
## POST /websites/linked2checkout_3_1/payment/void

### Description
Voids a recorded payment. This action should be used with caution and typically requires specific permissions or reasons.

### Method
POST

### Endpoint
/websites/linked2checkout_3_1/payment/void

### Parameters
#### Request Body
- **payment_id** (string) - Required - The ID of the payment to void.
- **reason** (string) - Required - The reason for voiding the payment.

### Request Example
```json
{
  "payment_id": "pay_1a2b3c4d5e",
  "reason": "Duplicate transaction recorded in error."
}
```

### Response
#### Success Response (200)
- **message** (string) - A confirmation message indicating the payment has been voided.

#### Response Example
```json
{
  "message": "Payment voided successfully."
}
```
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.