# POST /api/contract-plans/{id}/prices

Records a new price on a plan and states when it starts applying to existing subscribers.

**Required permissions**: `Customers.ContractPlans`, `Customers.ContractPlans.ChangePrice`  
**Scope**: merchant

**Operation ID:** `contractPlansChangePrice`

## Authorization

Requires: Customers.ContractPlans, Customers.ContractPlans.ChangePrice, merchant scope.

Requires API key scope: `admin`

Required permissions:
- `Customers.ContractPlans`
- `Customers.ContractPlans.ChangePrice`

## Parameters

| Name | In | Required | Type | Description |
| --- | --- | --- | --- | --- |
| id | path | yes | string(uuid) | The plan to re-price. |
| suppressNulls | query | no | boolean | If true, omit properties with null values. |

## Request Body

**Content type:** `application/json`

Schema: [`ChangeContractPlanPriceDto`](https://devportal.demo.winkpg.io/docs/api/models/ChangeContractPlanPriceDto.md)

Properties:
- `billSubtotalAmount` (number(double)): The new base amount charged each cycle, before tax. (min 0)
- `taxAmount` (number(double)): The new tax added to the base amount each cycle. Leave empty for no tax line. (nullable, min 0)
- `totalAmount` (number(double)): The new total charged to a subscriber each cycle. (greater than 0)
- `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): When the new price starts applying to existing subscribers.
  Values:
  - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
  - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
  - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
- `effectiveFrom` (string(date-time)): The moment the new price takes effect, in UTC. Required for  `Scheduled` and ignored for the other two policies,  which derive their effective moment from when the change is saved. Required: When Policy == Scheduled. (nullable)
- `note` (string): Why the price is changing, in the operator's own words. Kept with the revision so the reason  survives alongside the amount. (nullable, max length 512)
- `concurrencyStamp` (string): The concurrency stamp read with the plan, so a price change cannot be applied on top of  someone else's. (nullable)

_Example: Raise the price from the next cycle_

Adds a price of 146.14 a month (135.00 plus 11.14 of tax) to the plan, keeping every earlier price with its note. With NextCycle a subscriber is never re-priced inside a cycle already entered: a charge scheduled before this change bills the old price, and every charge scheduled after it bills 146.14. Immediate applies the new price to every charge from now on, and Scheduled applies it from effectiveFrom, which must be in the future. A decrease under Immediate or Scheduled credits the unused share of a cycle already paid on the next charge. Changing a price needs the ContractPlans.ChangePrice permission. Send the concurrencyStamp from your latest read of the plan.

```json
{
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}
```

**Content type:** `text/json`

Schema: [`ChangeContractPlanPriceDto`](https://devportal.demo.winkpg.io/docs/api/models/ChangeContractPlanPriceDto.md)

Properties:
- `billSubtotalAmount` (number(double)): The new base amount charged each cycle, before tax. (min 0)
- `taxAmount` (number(double)): The new tax added to the base amount each cycle. Leave empty for no tax line. (nullable, min 0)
- `totalAmount` (number(double)): The new total charged to a subscriber each cycle. (greater than 0)
- `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): When the new price starts applying to existing subscribers.
  Values:
  - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
  - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
  - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
- `effectiveFrom` (string(date-time)): The moment the new price takes effect, in UTC. Required for  `Scheduled` and ignored for the other two policies,  which derive their effective moment from when the change is saved. Required: When Policy == Scheduled. (nullable)
- `note` (string): Why the price is changing, in the operator's own words. Kept with the revision so the reason  survives alongside the amount. (nullable, max length 512)
- `concurrencyStamp` (string): The concurrency stamp read with the plan, so a price change cannot be applied on top of  someone else's. (nullable)

_Example: Raise the price from the next cycle_

Adds a price of 146.14 a month (135.00 plus 11.14 of tax) to the plan, keeping every earlier price with its note. With NextCycle a subscriber is never re-priced inside a cycle already entered: a charge scheduled before this change bills the old price, and every charge scheduled after it bills 146.14. Immediate applies the new price to every charge from now on, and Scheduled applies it from effectiveFrom, which must be in the future. A decrease under Immediate or Scheduled credits the unused share of a cycle already paid on the next charge. Changing a price needs the ContractPlans.ChangePrice permission. Send the concurrencyStamp from your latest read of the plan.

```json
{
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}
```

**Content type:** `application/*+json`

Schema: [`ChangeContractPlanPriceDto`](https://devportal.demo.winkpg.io/docs/api/models/ChangeContractPlanPriceDto.md)

Properties:
- `billSubtotalAmount` (number(double)): The new base amount charged each cycle, before tax. (min 0)
- `taxAmount` (number(double)): The new tax added to the base amount each cycle. Leave empty for no tax line. (nullable, min 0)
- `totalAmount` (number(double)): The new total charged to a subscriber each cycle. (greater than 0)
- `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): When the new price starts applying to existing subscribers.
  Values:
  - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
  - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
  - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
- `effectiveFrom` (string(date-time)): The moment the new price takes effect, in UTC. Required for  `Scheduled` and ignored for the other two policies,  which derive their effective moment from when the change is saved. Required: When Policy == Scheduled. (nullable)
- `note` (string): Why the price is changing, in the operator's own words. Kept with the revision so the reason  survives alongside the amount. (nullable, max length 512)
- `concurrencyStamp` (string): The concurrency stamp read with the plan, so a price change cannot be applied on top of  someone else's. (nullable)

_Example: Raise the price from the next cycle_

Adds a price of 146.14 a month (135.00 plus 11.14 of tax) to the plan, keeping every earlier price with its note. With NextCycle a subscriber is never re-priced inside a cycle already entered: a charge scheduled before this change bills the old price, and every charge scheduled after it bills 146.14. Immediate applies the new price to every charge from now on, and Scheduled applies it from effectiveFrom, which must be in the future. A decrease under Immediate or Scheduled credits the unused share of a cycle already paid on the next charge. Changing a price needs the ContractPlans.ChangePrice permission. Send the concurrencyStamp from your latest read of the plan.

```json
{
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}
```

## Responses

### 200

OK

**Content type:** `application/json`

Schema: [`ContractPlanDto`](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanDto.md)

Properties:
- `id` (string(uuid))
- `creationTime` (string(date-time)): The date and time when this entity was created.
- `creatorId` (string(uuid)): The ID of the user who created this entity. (nullable)
- `lastModificationTime` (string(date-time)): The date and time when this entity was last modified. (nullable)
- `lastModifierId` (string(uuid)): The ID of the user who last modified this entity. (nullable)
- `isDeleted` (boolean): Indicates whether this entity has been deleted.
- `deleterId` (string(uuid)): The ID of the user who deleted this entity, if it is deleted. (nullable)
- `deletionTime` (string(date-time)): The date and time when this entity was deleted, if it is deleted. (nullable)
- `merchantId` (string(uuid)): The merchant that owns the plan.
- `tenantId` (string(uuid)): The tenant that owns the plan. Null for host-level plans. (nullable)
- `name` (string): The plan's operator-facing name, unique within the owning merchant. (nullable)
- `code` (string): The merchant's own short code for the plan, or null. Not resolved by the platform. (nullable)
- `description` (string): What the plan covers, in the operator's own words. (nullable)
- `currencyCode` (string): The ISO 4217 alphabetic currency code the plan's amounts are denominated in. (nullable)
- `isActive` (boolean): Whether the plan may be subscribed to. An inactive plan keeps pricing the contracts already  on it.
- `defaultSchedule` ([ContractSchedule](https://devportal.demo.winkpg.io/docs/api/models/ContractSchedule.md)): The recurrence a new contract on this plan starts from, or null when the plan suggests none.
  Fields:
  - `frequency` ([Frequency](https://devportal.demo.winkpg.io/docs/api/models/Frequency.md)): The type of the recurrence rule.
    Values:
    - `Secondly`
    - `Minutely`
    - `Hourly`
    - `Daily`
    - `Weekly`
    - `Monthly`
    - `Yearly`
  - `count` (integer(int32)): The number of occurrences in a particular recurrence. (nullable)
  - `until` (string(date-time)): The datetime that bounds the current recurrence. (nullable)
  - `interval` (integer(int32)): The recurrence interval.
  - `bySecond` (array<integer(int32)>): BySecond rule modifier. (nullable)
  - `byMinute` (array<integer(int32)>): BySecond rule modifier. (nullable)
  - `byHour` (array<integer(int32)>): BySecond rule modifier. (nullable)
  - `byDay` (array<[ContractScheduleByDayRule](https://devportal.demo.winkpg.io/docs/api/models/ContractScheduleByDayRule.md)>): Week day rule modifier. (nullable)
  - `byMonth` (array<integer(int32)>): Month day rule modifier. (nullable)
  - `byMonthDay` (array<integer(int32)>): Month days rule modifier. (nullable)
  - `byYearDay` (array<integer(int32)>): Year days rule modifier. (nullable)
  - `byWeekNumber` (array<integer(int32)>): Week number rule modifier. (nullable)
  - `bySetPosition` (array<integer(int32)>): BySetPosition rule modifier. (nullable)
  - `firstDayOfWeek` ([DayOfWeek](https://devportal.demo.winkpg.io/docs/api/models/DayOfWeek.md)): The first day of week, used in calculating weekday-based recurrences (nullable)
    Values:
    - `Sunday`
    - `Monday`
    - `Tuesday`
    - `Wednesday`
    - `Thursday`
    - `Friday`
    - `Saturday`
  - `nextScheduledRun` (string(date-time)): The next computed billing date, updated after each billing run. Null for contracts that  have never been scheduled or have ended. (nullable)
  - `startDate` (string(date-time)): The earliest date on which this contract is eligible to bill. Set by the user  when creating the contract (defaults to the creation date) and may be set to a  future date to delay first billing. The recurrence engine anchors expansion to  this date and the daily billing job will not fire a contract whose  `startDate` is in the future.                Null on contracts created before this field existed. When it is null, the server  anchors the schedule on the contract's creation time, or on the current time when  that is also absent; callers that compute a schedule themselves should apply the  same fallback. (nullable)
- `trialDays` (integer(int32)): The trial length a new contract on this plan inherits, in days, or null when the plan offers  no trial. (nullable)
- `currentPrice` ([ContractPlanPriceDto](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceDto.md)): The plan's price today: the revision in force at the moment the plan was read, with no  scheduled run to measure a next-cycle change against.
  Fields:
  - `id` (string(uuid)): Identifies this revision.
  - `billSubtotalAmount` (number(double)): The base amount charged each cycle, before tax.
  - `taxAmount` (number(double)): The tax added to the base amount each cycle, or null when the plan carries no tax line. (nullable)
  - `totalAmount` (number(double)): The total charged to the subscriber's payment method each cycle.
  - `effectiveFrom` (string(date-time)): The moment this revision starts applying, in UTC.
  - `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): The propagation policy the revision was saved under.
    Values:
    - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
    - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
    - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
  - `recordedAt` (string(date-time)): When the revision was saved, in UTC.
  - `recordedByUserId` (string(uuid)): The operator who saved the revision, or null when the platform wrote it. (nullable)
  - `note` (string): Why the price changed, in the operator's own words. (nullable)
- `pendingPrice` ([ContractPlanPriceDto](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceDto.md)): The revision that will take over next, when one is scheduled and has not taken effect yet.  Null when the plan has no pending change.
  Fields:
  - `id` (string(uuid)): Identifies this revision.
  - `billSubtotalAmount` (number(double)): The base amount charged each cycle, before tax.
  - `taxAmount` (number(double)): The tax added to the base amount each cycle, or null when the plan carries no tax line. (nullable)
  - `totalAmount` (number(double)): The total charged to the subscriber's payment method each cycle.
  - `effectiveFrom` (string(date-time)): The moment this revision starts applying, in UTC.
  - `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): The propagation policy the revision was saved under.
    Values:
    - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
    - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
    - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
  - `recordedAt` (string(date-time)): When the revision was saved, in UTC.
  - `recordedByUserId` (string(uuid)): The operator who saved the revision, or null when the platform wrote it. (nullable)
  - `note` (string): Why the price changed, in the operator's own words. (nullable)
- `prices` (array<[ContractPlanPriceDto](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceDto.md)>): Every price the plan has carried, oldest first. (nullable)
  Fields of each item:
  - `id` (string(uuid)): Identifies this revision.
  - `billSubtotalAmount` (number(double)): The base amount charged each cycle, before tax.
  - `taxAmount` (number(double)): The tax added to the base amount each cycle, or null when the plan carries no tax line. (nullable)
  - `totalAmount` (number(double)): The total charged to the subscriber's payment method each cycle.
  - `effectiveFrom` (string(date-time)): The moment this revision starts applying, in UTC.
  - `policy` ([ContractPlanPriceChangePolicy](https://devportal.demo.winkpg.io/docs/api/models/ContractPlanPriceChangePolicy.md)): The propagation policy the revision was saved under.
    Values:
    - `Immediate`: The new price applies to every charge executed from the moment the change was saved, including a charge that was already due and has not run yet.
    - `NextCycle`: The new price applies only to charges that fall due after the change was saved. A charge that was already due when the price changed still bills at the old price, so a subscriber is never re-priced part-way through a cycle they have already entered.
    - `Scheduled`: The new price applies to charges executed on or after an operator-chosen effective moment. Until then every subscriber keeps billing at the previous price.
  - `recordedAt` (string(date-time)): When the revision was saved, in UTC.
  - `recordedByUserId` (string(uuid)): The operator who saved the revision, or null when the platform wrote it. (nullable)
  - `note` (string): Why the price changed, in the operator's own words. (nullable)
- `concurrencyStamp` (string): The concurrency stamp used for optimistic concurrency control. (nullable)
- `entityVersion` (integer(int32)): The entity version, incremented on each modification.

### 403

Forbidden

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 401

Unauthorized

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 400

Bad Request

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Request failed validation_

One or more fields were rejected before any rule ran. error.code is null on the envelope and the causes are in validationErrors, one entry per failure. An entry carries code when the validator declared a publishable one, and memberPaths when the full path says more than members does (an element inside a collection, for example). Both keys are omitted when they would add nothing.

```json
{
  "error": {
    "code": "null",
    "message": "Your request is not valid!",
    "details": "The following errors were detected during validation.",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": [
      {
        "message": "'Amount' must be greater than 0.",
        "members": [
          "amount"
        ]
      },
      {
        "message": "The card has expired.",
        "members": [
          "expirationDate"
        ],
        "code": "CardData:CardExpired"
      },
      {
        "message": "'Value' must not be empty.",
        "members": [
          "value"
        ],
        "memberPaths": [
          "customFields[2].value"
        ]
      }
    ]
  }
}
```

### 404

Not Found

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Resource not found_

The id in the path names no record the caller can see. Most resources answer with a null error.code and a message naming the resource type and the id; a resource that publishes a not-found code in the catalog above carries it in error.code instead, so check for one before matching on the message.

```json
{
  "error": {
    "code": "null",
    "message": "There is no entity Transaction with id = 7d1f3a52-0c4e-4b8a-9e21-5a6b7c8d9e00!",
    "details": "null",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": "null"
  }
}
```

### 409

Conflict. The `concurrencyStamp` sent is not the resource's current one: the resource changed after it was read. Read the resource again and retry with the `concurrencyStamp` it returns. The body carries the standard error envelope.

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 501

Not Implemented

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 500

Internal Server Error

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### default

The request failed. The body carries the standard error envelope: a machine-readable `error.code`, a human-readable `error.message`, and `error.validationErrors` when the failure was a validation rejection. The [error reference](https://devportal.demo.winkpg.io/docs/errors.md) lists the values `error.code` can take.

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Business rule refused the request_

The request was understood and rejected by a platform rule. This is the shape that carries a code from the catalog above, so branch on error.code rather than on the message text. The HTTP status is the one listed against the code.

```json
{
  "error": {
    "code": "Transactions:OperationNotAllowed",
    "message": "The operation 'Void' is not allowed on a Sale transaction with result 'Approved' and settlement state 'Settled'.",
    "details": "null",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": "null"
  }
}
```

### 429

The request was refused because a rate limit was exceeded, or because something a later retry can clear stopped it. A rate limit refusal carries an `application/problem+json` body: wait at least the interval `Retry-After` names before retrying, then back off. Limits are tuned per deployment, so read the allowance from the response headers rather than assuming a fixed ceiling. Any other refusal carries the standard error envelope as `application/json`, and its `error.code` names the cause.

**Content type:** `application/problem+json`

Schema: [`RateLimitProblemDetails`](https://devportal.demo.winkpg.io/docs/api/models/RateLimitProblemDetails.md)

Properties:
- `type` (string) required: The problem type identifier. Always the same value: the failure is the status code itself,  so there is no sub-type for a caller to branch on. (nullable)
- `title` (string) required: A short, human-readable summary of the problem type. (nullable)
- `status` (integer(int32)) required: The HTTP status code, repeated in the body as the problem-details format defines.
- `detail` (string) required: A human-readable explanation of this occurrence of the problem. (nullable)
- `retryAfterSeconds` (integer(int32)) required: How long to wait before retrying, in whole seconds, carrying the same figure as the  `Retry-After` header. Always at least one: a value of zero would invite an immediate  retry that is certain to be rejected again.

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

## Example request

Every block below sends the same request. Replace {{BASE_URL}} with the address of the API you are calling and {{API_KEY}} with your own key.

The request body is a ChangeContractPlanPriceDto. See the Request body section below for its fields.

### cURL

```bash
curl -X POST "{{BASE_URL}}/api/contract-plans/{id}/prices" \
  -H "api-key: {{API_KEY}}" \
  -H "Content-Type: application/json" \
  -d '{
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}'
```

### PowerShell

```powershell
$headers = @{
    'api-key' = '{{API_KEY}}'
}

$body = @'
{
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}
'@

$response = Invoke-RestMethod -Method POST -Uri '{{BASE_URL}}/api/contract-plans/{id}/prices' `
    -Headers $headers -ContentType 'application/json' -Body $body
```

### TypeScript (SDK)

```bash
npm install @winkpg/winkpg-api
```

```typescript
import { Configuration, ContractPlansApi } from '@winkpg/winkpg-api';

const api = new ContractPlansApi(new Configuration({
  basePath: '{{BASE_URL}}',
  apiKey: '{{API_KEY}}',
}));

const { data } = await api.contractPlansChangePrice("3fa85f64-5717-4562-b3fc-2c963f66afa6", {
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
});
```

### TypeScript (raw HTTP)

```typescript
const response = await fetch('{{BASE_URL}}/api/contract-plans/{id}/prices', {
  method: 'POST',
  headers: {
    "api-key": "{{API_KEY}}",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "billSubtotalAmount": 135,
    "taxAmount": 11.14,
    "totalAmount": 146.14,
    "policy": "NextCycle",
    "note": "Annual price adjustment.",
    "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
  }),
});

const data = await response.json();
```

### C# (SDK)

```bash
dotnet add package WinkPg.Api.Client
```

```csharp
using WinkPg.Api.Client.Api;
using WinkPg.Api.Client.Client;
using System.Text.Json;

var config = new Configuration { BasePath = "{{BASE_URL}}" };
config.AddApiKey("api-key", "{{API_KEY}}");

var api = new ContractPlansApi(config);
var body = JsonSerializer.Deserialize<ChangeContractPlanPriceDto>("""
    {
      "billSubtotalAmount": 135,
      "taxAmount": 11.14,
      "totalAmount": 146.14,
      "policy": "NextCycle",
      "note": "Annual price adjustment.",
      "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
    }
    """);

var result = await api.ContractPlansChangePriceAsync(Guid.Parse("3fa85f64-5717-4562-b3fc-2c963f66afa6"), body);
```

### C# (raw HTTP)

```csharp
using System.Text;

using var http = new HttpClient { BaseAddress = new Uri("{{BASE_URL}}") };

var request = new HttpRequestMessage(new HttpMethod("POST"), "/api/contract-plans/{id}/prices");
request.Headers.Add("api-key", "{{API_KEY}}");

request.Content = new StringContent("""
    {
      "billSubtotalAmount": 135,
      "taxAmount": 11.14,
      "totalAmount": 146.14,
      "policy": "NextCycle",
      "note": "Annual price adjustment.",
      "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
    }
    """, Encoding.UTF8, "application/json");

var response = await http.SendAsync(request);
response.EnsureSuccessStatusCode();
var json = await response.Content.ReadAsStringAsync();
```

### Python (SDK)

```bash
pip install winkpg-api
```

```python
import winkpg_api

configuration = winkpg_api.Configuration(host="{{BASE_URL}}")
configuration.api_key["ApiKey"] = "{{API_KEY}}"

with winkpg_api.ApiClient(configuration) as client:
    api = winkpg_api.ContractPlansApi(client)
    body = winkpg_api.ChangeContractPlanPriceDto.from_dict({
      "billSubtotalAmount": 135,
      "taxAmount": 11.14,
      "totalAmount": 146.14,
      "policy": "NextCycle",
      "note": "Annual price adjustment.",
      "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
    })
    result = api.contract_plans_change_price("3fa85f64-5717-4562-b3fc-2c963f66afa6", body)
```

### Python (raw HTTP)

```bash
pip install requests
```

```python
import requests

headers = {
    "api-key": "{{API_KEY}}",
    "Content-Type": "application/json",
}

body = {
  "billSubtotalAmount": 135,
  "taxAmount": 11.14,
  "totalAmount": 146.14,
  "policy": "NextCycle",
  "note": "Annual price adjustment.",
  "concurrencyStamp": "8b4e2f0a6c1d4e9f8a7b3c2d1e0f9a8b"
}

response = requests.request(
    "POST",
    "{{BASE_URL}}/api/contract-plans/{id}/prices",
    headers=headers,
    json=body,
)
response.raise_for_status()
data = response.json()
```

## See also

- [All documentation](https://devportal.demo.winkpg.io/llms.txt): the machine-readable index of every public page on this site.
