# Retrieve an invoice item

## OpenAPI Specification

```yaml
openapi: 3.0.1
info:
  title: ''
  description: ''
  version: 1.0.0
paths:
  /v1/invoiceitems/{id}:
    get:
      summary: Retrieve an invoice item
      deprecated: false
      description: ''
      tags:
        - API Reference/Invoice Items
      parameters:
        - name: id
          in: path
          description: ''
          required: true
          schema:
            type: string
        - name: Accept
          in: header
          description: ''
          required: true
          example: application/json
          schema:
            type: string
        - name: Content-Type
          in: header
          description: ''
          required: true
          example: application/json
          schema:
            type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                type: object
                x-apifox-refs:
                  01HC778DDSV7V1FTQBJ6W5EBEJ:
                    $ref: '#/components/schemas/Invoice%20item'
                    x-apifox-overrides:
                      proration: null
                      tax_rates: null
                      discountable: null
                      discounts: null
                      unit_amount_decimal: null
                x-apifox-orders:
                  - 01HC778DDSV7V1FTQBJ6W5EBEJ
                properties:
                  id:
                    type: string
                    description: Unique identifier for the object.
                  object:
                    type: string
                    description: '"invoiceitem"'
                  amount:
                    type: integer
                    description: >-
                      Amount (in the currency specified) of the invoice item.
                      This should always be equal to unit_amount * quantity.
                  currency:
                    type: string
                    description: Three-letter ISO currency code
                  customer:
                    type: string
                    description: >-
                      The ID of the customer who will be billed when this
                      invoice item is billed.
                  description:
                    type: string
                    description: >-
                      An arbitrary string attached to the object. Often useful
                      for displaying to users.
                  metadata:
                    type: object
                    properties: {}
                    description: Set of key-value pairs that you can attach to an object.
                    x-apifox-orders: []
                    x-apifox-ignore-properties: []
                  period:
                    type: object
                    properties:
                      end:
                        type: string
                        description: >-
                          timestamp.The end of the period, which must be greater
                          than or equal to the start. This value is inclusive.
                      start:
                        type: string
                        description: >-
                          timestamp. The start of the period. This value is
                          inclusive.
                    x-apifox-orders:
                      - end
                      - start
                    description: >-
                      The period associated with this invoice item. When set to
                      different values, the period will be rendered on the
                      invoice.
                    x-apifox-ignore-properties: []
                  price:
                    type: object
                    x-apifox-refs:
                      01HC6W63CA87BWB46BAWMWWCQC: &ref_0
                        $ref: '#/components/schemas/Price'
                        x-apifox-overrides:
                          transform_quantity: null
                          tiers_mode: null
                          tax_behavior: null
                          custom_unit_amount: null
                          unit_amount_decimal: null
                    x-apifox-orders:
                      - 01HC6W63CA87BWB46BAWMWWCQC
                    properties:
                      id:
                        type: string
                        description: Unique identifier for the object, like "price_xxxx".
                      object:
                        type: string
                        description: '''price'''
                      active:
                        type: boolean
                        description: Whether the price can be used for new purchases.
                      billing_scheme:
                        type: string
                        description: >-
                          Describes how to compute the price per period. Either
                          per_unit or tiered
                        enum:
                          - per_unit
                          - tiered
                        x-apifox-enum:
                          - value: per_unit
                            name: ''
                            description: only per_unit is supported now.
                          - value: tiered
                            name: ''
                            description: ''
                      created:
                        type: integer
                        description: >-
                          Time at which the object was created. Measured in
                          seconds since the Unix epoch.
                      currency:
                        type: string
                        description: 'Three-letter ISO currency code, in uppercase. '
                      livemode:
                        type: boolean
                        description: >-
                          Has the value true if the object exists in live mode
                          or the value false if the object exists in test mode.
                      lookup_key:
                        type: string
                        description: >-
                          A lookup key used to retrieve prices dynamically from
                          a static string. This may be up to 200 characters.
                      metadata:
                        type: object
                        properties: {}
                        x-apifox-orders: []
                        description: >-
                          Set of key-value pairs that you can attach to an
                          object. This can be useful for storing additional
                          information about the object in a structured format.
                        x-apifox-ignore-properties: []
                      nickname:
                        type: string
                        description: >-
                          A brief description of the price, hidden from
                          customers.
                      product:
                        type: string
                        description: The ID of the product this price is associated with.
                      type:
                        type: string
                        description: >-
                          One of one_time or recurring depending on whether the
                          price is for a one-time purchase or a recurring
                          (subscription) purchase.
                        enum:
                          - one_time
                          - recurring
                        x-apifox-enum:
                          - value: one_time
                            name: ''
                            description: only one-time is supported now.
                          - value: recurring
                            name: ''
                            description: ''
                      unit_amount:
                        type: integer
                        description: >-
                          The unit amount in cents to be charged, represented as
                          a whole integer if possible. Only set if
                          billing_scheme=per_unit.
                      recurring:
                        type: object
                        properties:
                          interval:
                            type: string
                            description: >-
                              The frequency at which a subscription is billed.
                              One of day, week, month or year.
                            enum:
                              - day
                              - week
                              - month
                              - year
                            x-apifox-enum:
                              - value: day
                                name: ''
                                description: ''
                              - value: week
                                name: ''
                                description: ''
                              - value: month
                                name: ''
                                description: ''
                              - value: year
                                name: ''
                                description: ''
                          interval_count:
                            type: integer
                            description: >-
                              The number of intervals (specified in the interval
                              attribute) between subscription billings. For
                              example, interval=month and interval_count=3 bills
                              every 3 months.
                          usage_type:
                            type: string
                            description: >-
                              Configures how the quantity per period should be
                              determined.
                            enum:
                              - licensed
                            x-apifox-enum:
                              - value: licensed
                                name: ''
                                description: ''
                        x-apifox-orders:
                          - interval
                          - interval_count
                          - usage_type
                        description: The recurring components of a price
                        required:
                          - interval
                        x-apifox-ignore-properties: []
                      tiers:
                        type: array
                        items:
                          type: object
                          properties:
                            up_to:
                              type: string
                              description: >-
                                Specifies the upper bound of this tier. The
                                lower bound of a tier is the upper bound of the
                                previous tier adding one. Use inf to define a
                                fallback tier.
                            flat_amount:
                              type: string
                              description: >-
                                The flat billing amount for an entire tier,
                                regardless of the number of units in the tier.
                            unit_amount:
                              type: string
                              description: >-
                                The per unit billing amount for each individual
                                unit for which this tier applies.
                          x-apifox-orders:
                            - up_to
                            - flat_amount
                            - unit_amount
                          x-apifox-ignore-properties: []
                        description: （未实现）
                    description: The ID of the price object.
                    x-apifox-ignore-properties:
                      - id
                      - object
                      - active
                      - billing_scheme
                      - created
                      - currency
                      - livemode
                      - lookup_key
                      - metadata
                      - nickname
                      - product
                      - type
                      - unit_amount
                      - recurring
                      - tiers
                  date:
                    type: string
                    description: >-
                      Time at which the object was created. Measured in seconds
                      since the Unix epoch.
                  invoice:
                    type: string
                    description: >-
                      The ID of an existing invoice to add this invoice item to.
                      When left blank, the invoice item will be added to the
                      next upcoming scheduled invoice. This is useful when
                      adding invoice items in response to an invoice.created
                      webhook. You can only add invoice items to draft invoices
                      and there is a maximum of 250 items per invoice.
                  livemode:
                    type: boolean
                    description: >-
                      Has the value true if the object exists in live mode or
                      the value false if the object exists in test mode.
                  quantity:
                    type: integer
                    description: >-
                      The quantity of the subscription, if the line item is a
                      subscription or a proration.
                  subscription:
                    type: string
                    description: >-
                      The ID of a subscription to add this invoice item to. When
                      left blank, the invoice item will be be added to the next
                      upcoming scheduled invoice. When set, scheduled invoices
                      for subscriptions other than the specified subscription
                      will ignore the invoice item. Use this when you want to
                      express that an invoice item has been accrued within the
                      context of a particular subscription.
                  unit_amount:
                    type: integer
                    description: >-
                      The integer unit amount in pence of the charge to be
                      applied to the upcoming invoice. This unit_amount will be
                      multiplied by the quantity to get the full amount. Passing
                      in a negative unit_amount will reduce the amount_due on
                      the invoice.
                  test_clock:
                    type: string
                    description: ID of the test clock this invoice item belongs to.
                x-apifox-ignore-properties:
                  - id
                  - object
                  - amount
                  - currency
                  - customer
                  - description
                  - metadata
                  - period
                  - price
                  - date
                  - invoice
                  - livemode
                  - quantity
                  - subscription
                  - unit_amount
                  - test_clock
          headers: {}
          x-apifox-name: OK
      security:
        - basic: []
      x-apifox-folder: API Reference/Invoice Items
      x-apifox-status: developing
      x-run-in-apifox: https://app.apifox.com/web/project/1296482/apis/api-114919063-run
components:
  schemas:
    Price:
      type: object
      properties:
        id: &ref_1
          type: string
          description: Unique identifier for the object, like "price_xxxx".
        object: &ref_2
          type: string
          description: '''price'''
        active: &ref_3
          type: boolean
          description: Whether the price can be used for new purchases.
        billing_scheme:
          type: string
          description: >-
            Describes how to compute the price per period. Either per_unit or
            tiered
          enum: &ref_4
            - per_unit
            - tiered
          x-apifox-enum:
            - value: per_unit
              name: ''
              description: only per_unit is supported now.
            - value: tiered
              name: ''
              description: ''
        created: &ref_5
          type: integer
          description: >-
            Time at which the object was created. Measured in seconds since the
            Unix epoch.
        currency: &ref_6
          type: string
          description: 'Three-letter ISO currency code, in uppercase. '
        livemode: &ref_7
          type: boolean
          description: >-
            Has the value true if the object exists in live mode or the value
            false if the object exists in test mode.
        lookup_key: &ref_8
          type: string
          description: >-
            A lookup key used to retrieve prices dynamically from a static
            string. This may be up to 200 characters.
        metadata:
          type: object
          properties: {}
          x-apifox-orders: &ref_9 []
          description: >-
            Set of key-value pairs that you can attach to an object. This can be
            useful for storing additional information about the object in a
            structured format.
          x-apifox-ignore-properties: []
        nickname: &ref_10
          type: string
          description: A brief description of the price, hidden from customers.
        product: &ref_11
          type: string
          description: The ID of the product this price is associated with.
        type:
          type: string
          description: >-
            One of one_time or recurring depending on whether the price is for a
            one-time purchase or a recurring (subscription) purchase.
          enum: &ref_12
            - one_time
            - recurring
          x-apifox-enum:
            - value: one_time
              name: ''
              description: only one-time is supported now.
            - value: recurring
              name: ''
              description: ''
        unit_amount: &ref_13
          type: integer
          description: >-
            The unit amount in cents to be charged, represented as a whole
            integer if possible. Only set if billing_scheme=per_unit.
        custom_unit_amount:
          type: 'null'
          description: （未实现）
        recurring:
          type: object
          properties:
            interval:
              type: string
              description: >-
                The frequency at which a subscription is billed. One of day,
                week, month or year.
              enum: &ref_14
                - day
                - week
                - month
                - year
              x-apifox-enum:
                - value: day
                  name: ''
                  description: ''
                - value: week
                  name: ''
                  description: ''
                - value: month
                  name: ''
                  description: ''
                - value: year
                  name: ''
                  description: ''
            interval_count: &ref_15
              type: integer
              description: >-
                The number of intervals (specified in the interval attribute)
                between subscription billings. For example, interval=month and
                interval_count=3 bills every 3 months.
            usage_type:
              type: string
              description: Configures how the quantity per period should be determined.
              enum: &ref_16
                - licensed
              x-apifox-enum:
                - value: licensed
                  name: ''
                  description: ''
          x-apifox-orders: &ref_17
            - interval
            - interval_count
            - usage_type
          description: The recurring components of a price
          required:
            - interval
          x-apifox-ignore-properties: []
        tax_behavior:
          type: string
          description: （未实现）
        tiers_mode:
          type: 'null'
          description: （未实现）
        tiers:
          type: array
          items:
            type: object
            properties:
              up_to: &ref_18
                type: string
                description: >-
                  Specifies the upper bound of this tier. The lower bound of a
                  tier is the upper bound of the previous tier adding one. Use
                  inf to define a fallback tier.
              flat_amount: &ref_19
                type: string
                description: >-
                  The flat billing amount for an entire tier, regardless of the
                  number of units in the tier.
              unit_amount: &ref_20
                type: string
                description: >-
                  The per unit billing amount for each individual unit for which
                  this tier applies.
            x-apifox-orders: &ref_21
              - up_to
              - flat_amount
              - unit_amount
            x-apifox-ignore-properties: []
          description: （未实现）
        transform_quantity:
          type: 'null'
          description: （未实现）
        unit_amount_decimal:
          type: string
          description: （未实现）
      x-apifox-orders:
        - id
        - object
        - active
        - billing_scheme
        - created
        - currency
        - livemode
        - lookup_key
        - metadata
        - nickname
        - product
        - type
        - unit_amount
        - custom_unit_amount
        - recurring
        - tax_behavior
        - tiers_mode
        - tiers
        - transform_quantity
        - unit_amount_decimal
      x-apifox-ignore-properties: []
      x-apifox-folder: ''
    Invoice item:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the object.
        object:
          type: string
          description: '"invoiceitem"'
        amount:
          type: integer
          description: >-
            Amount (in the currency specified) of the invoice item. This should
            always be equal to unit_amount * quantity.
        currency:
          type: string
          description: Three-letter ISO currency code
        customer:
          type: string
          description: >-
            The ID of the customer who will be billed when this invoice item is
            billed.
        description:
          type: string
          description: >-
            An arbitrary string attached to the object. Often useful for
            displaying to users.
        metadata:
          type: object
          properties: {}
          description: Set of key-value pairs that you can attach to an object.
          x-apifox-orders: []
          x-apifox-ignore-properties: []
        period:
          type: object
          properties:
            end:
              type: string
              description: >-
                timestamp.The end of the period, which must be greater than or
                equal to the start. This value is inclusive.
            start:
              type: string
              description: timestamp. The start of the period. This value is inclusive.
          x-apifox-orders:
            - end
            - start
          description: >-
            The period associated with this invoice item. When set to different
            values, the period will be rendered on the invoice.
          x-apifox-ignore-properties: []
        price:
          type: object
          x-apifox-refs:
            01HC6W63CA87BWB46BAWMWWCQC: *ref_0
          x-apifox-orders:
            - 01HC6W63CA87BWB46BAWMWWCQC
          properties:
            id: *ref_1
            object: *ref_2
            active: *ref_3
            billing_scheme:
              type: string
              description: >-
                Describes how to compute the price per period. Either per_unit
                or tiered
              enum: *ref_4
              x-apifox-enum:
                - value: per_unit
                  name: ''
                  description: only per_unit is supported now.
                - value: tiered
                  name: ''
                  description: ''
            created: *ref_5
            currency: *ref_6
            livemode: *ref_7
            lookup_key: *ref_8
            metadata:
              type: object
              properties: {}
              x-apifox-orders: *ref_9
              description: >-
                Set of key-value pairs that you can attach to an object. This
                can be useful for storing additional information about the
                object in a structured format.
              x-apifox-ignore-properties: []
            nickname: *ref_10
            product: *ref_11
            type:
              type: string
              description: >-
                One of one_time or recurring depending on whether the price is
                for a one-time purchase or a recurring (subscription) purchase.
              enum: *ref_12
              x-apifox-enum:
                - value: one_time
                  name: ''
                  description: only one-time is supported now.
                - value: recurring
                  name: ''
                  description: ''
            unit_amount: *ref_13
            recurring:
              type: object
              properties:
                interval:
                  type: string
                  description: >-
                    The frequency at which a subscription is billed. One of day,
                    week, month or year.
                  enum: *ref_14
                  x-apifox-enum:
                    - value: day
                      name: ''
                      description: ''
                    - value: week
                      name: ''
                      description: ''
                    - value: month
                      name: ''
                      description: ''
                    - value: year
                      name: ''
                      description: ''
                interval_count: *ref_15
                usage_type:
                  type: string
                  description: Configures how the quantity per period should be determined.
                  enum: *ref_16
                  x-apifox-enum:
                    - value: licensed
                      name: ''
                      description: ''
              x-apifox-orders: *ref_17
              description: The recurring components of a price
              required:
                - interval
              x-apifox-ignore-properties: []
            tiers:
              type: array
              items:
                type: object
                properties:
                  up_to: *ref_18
                  flat_amount: *ref_19
                  unit_amount: *ref_20
                x-apifox-orders: *ref_21
                x-apifox-ignore-properties: []
              description: （未实现）
          description: The ID of the price object.
          x-apifox-ignore-properties:
            - id
            - object
            - active
            - billing_scheme
            - created
            - currency
            - livemode
            - lookup_key
            - metadata
            - nickname
            - product
            - type
            - unit_amount
            - recurring
            - tiers
        date:
          type: string
          description: >-
            Time at which the object was created. Measured in seconds since the
            Unix epoch.
        invoice:
          type: string
          description: >-
            The ID of an existing invoice to add this invoice item to. When left
            blank, the invoice item will be added to the next upcoming scheduled
            invoice. This is useful when adding invoice items in response to an
            invoice.created webhook. You can only add invoice items to draft
            invoices and there is a maximum of 250 items per invoice.
        livemode:
          type: boolean
          description: >-
            Has the value true if the object exists in live mode or the value
            false if the object exists in test mode.
        quantity:
          type: integer
          description: >-
            The quantity of the subscription, if the line item is a subscription
            or a proration.
        subscription:
          type: string
          description: >-
            The ID of a subscription to add this invoice item to. When left
            blank, the invoice item will be be added to the next upcoming
            scheduled invoice. When set, scheduled invoices for subscriptions
            other than the specified subscription will ignore the invoice item.
            Use this when you want to express that an invoice item has been
            accrued within the context of a particular subscription.
        unit_amount:
          type: integer
          description: >-
            The integer unit amount in pence of the charge to be applied to the
            upcoming invoice. This unit_amount will be multiplied by the
            quantity to get the full amount. Passing in a negative unit_amount
            will reduce the amount_due on the invoice.
        test_clock:
          type: string
          description: ID of the test clock this invoice item belongs to.
        proration:
          type: boolean
          deprecated: true
          description: >-
            Whether the invoice item was created automatically as a proration
            adjustment when the customer switched plans.
        tax_rates:
          type: string
          description: 未完成
          deprecated: true
        discountable:
          type: string
          description: 未完成
          deprecated: true
        discounts:
          type: string
          description: 未完成
          deprecated: true
        unit_amount_decimal:
          type: string
          description: 未完成
          deprecated: true
      x-apifox-refs: {}
      x-apifox-orders:
        - id
        - object
        - amount
        - currency
        - customer
        - description
        - metadata
        - period
        - price
        - date
        - invoice
        - livemode
        - quantity
        - subscription
        - unit_amount
        - test_clock
        - proration
        - tax_rates
        - discountable
        - discounts
        - unit_amount_decimal
      x-apifox-ignore-properties: []
      x-apifox-folder: ''
  securitySchemes:
    basic:
      type: http
      scheme: basic
servers:
  - url: https://apitest.wooshpay.com
    description: 官网测试
security:
  - basic: []

```
