---
title: "List subscription addons"
method: GET
path: "/v3/openmeter/subscriptions/{subscriptionId}/addons"
tags: ["OpenMeter Subscriptions"]
---

# List subscription addons

`GET /v3/openmeter/subscriptions/{subscriptionId}/addons`

**Pre-release Endpoint**
This endpoint is currently in beta and is subject to change.

List the add-ons of a subscription.

## Path parameters

- `subscriptionId` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).

## Query parameters

- `page` object
  - `size` integer — The number of items to include per page.
  - `number` integer — The page number.
- `sort` string — The `asc` suffix is optional as the default sort order is ascending. The `desc` suffix is used to specify a descending order. Multiple sort attributes may be provided via a comma separated list. JSONPath notation may be used to specify a sub-attribute (eg: 'foo.bar desc').

## Response `200`

Page paginated response.

- SubscriptionAddonPagePaginatedResponse — Page paginated response.
  - `data` SubscriptionAddon[], required
    - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
    - `labels` Labels — Labels store metadata of an entity that can be used for filtering an entity list or for searching across entity types. Keys must be of length 1-63 characters, and cannot start with "kong", "konnect", "mesh", "kic", or "_".
    - `created_at` string, date-time, required — An ISO-8601 timestamp representation of entity creation date.
    - `updated_at` string, date-time, required — An ISO-8601 timestamp representation of entity last update date.
    - `deleted_at` string, date-time — An ISO-8601 timestamp representation of entity deletion date.
    - `name` string, required — Display name of the resource. Between 1 and 256 characters.
    - `description` string — Optional description of the resource. Maximum 1024 characters.
    - `addon` object, required — The add-on associated with the subscription.
      - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
    - `quantity` integer, required — The quantity of the add-on. Always 1 for single instance add-ons.
    - `quantity_at` string, date-time, required — An ISO-8601 timestamp representation of which point in time the quantity was resolved to.
    - `active_from` string, date-time, required — An ISO-8601 timestamp representation of the cadence start of the resource.
    - `active_to` string, date-time — An ISO-8601 timestamp representation of the cadence end of the resource.
    - `timeline` SubscriptionAddonTimelineSegment[], required — The timeline of the add-on. The returned periods are sorted and continuous.
      - `active_from` string, date-time, required — An ISO-8601 timestamp representation of the cadence start of the resource.
      - `active_to` string, date-time — An ISO-8601 timestamp representation of the cadence end of the resource.
      - `quantity` integer, required — The quantity of the add-on for the given period.
    - `rate_cards` SubscriptionAddonRateCard[], required — The rate cards of the add-on.
      - `rate_card` object, required — The rate card.
        - `name` string, required — Display name of the resource. Between 1 and 256 characters.
        - `description` string — Optional description of the resource. Maximum 1024 characters.
        - `labels` Labels — Labels store metadata of an entity that can be used for filtering an entity list or for searching across entity types. Keys must be of length 1-63 characters, and cannot start with "kong", "konnect", "mesh", "kic", or "_".
        - `key` string, required — A key is a unique string that is used to identify a resource.
        - `feature` object — The feature associated with the rate card.
          - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
        - `billing_cadence` string, ISO8601 — The billing cadence of the rate card. When null, the charge is one-time (non-recurring). Only valid for flat prices.
        - `price` union, required — The price of the rate card.
          - object — Free price.
            - `type` 'free', required — The type of the price.
          - object — Flat price.
            - `type` 'flat', required — The type of the price.
            - `amount` string, required — The amount of the flat price.
          - object — Unit price. Charges a fixed rate per billing unit. When UnitConfig is present on the rate card, billing units are the converted quantities (e.g. GB instead of bytes).
            - `type` 'unit', required — The type of the price.
            - `amount` string, required — The amount of the unit price.
          - object — Graduated tiered price. Each tier's rate applies only to the usage within that tier. Pricing can change as cumulative usage crosses tier boundaries. When UnitConfig is present on the rate card, tier boundaries (up_to_amount) are expressed in converted billing units.
            - `type` 'graduated', required — The type of the price.
            - `tiers` BillingPriceTier[], required — The tiers of the graduated price. At least one tier is required.
              - …
          - object — Volume tiered price. The maximum quantity within a period determines the per-unit price for all units in that period. When UnitConfig is present on the rate card, tier boundaries (up_to_amount) are expressed in converted billing units.
            - `type` 'volume', required — The type of the price.
            - `tiers` BillingPriceTier[], required — The tiers of the volume price. At least one tier is required.
              - …
        - `unit_config` object — Unit conversion configuration for the rate card. Synthesized on read for plans authored with v1 dynamic or package prices: dynamic prices map to a unit price with a multiply unit config, and package prices map to a unit price with a divide unit config. Accepted on create and update only when the UnitConfig feature is enabled on the deployment; otherwise rejected.
          - `operation` 'divide' | 'multiply', required — The arithmetic operation to apply to the raw metered quantity.
          - `conversion_factor` string, required — The factor used in the conversion operation. - For `divide`: `converted = raw / conversionFactor`. - For `multiply`: `converted = raw × conversionFactor`. Must be a positive non-zero value.
          - `rounding` 'ceiling' | 'floor' | 'half_up' | 'none' — The rounding mode applied to the converted quantity for invoicing. Defaults to none (no rounding). Entitlement checks always use the precise (unrounded) value.
          - `precision` integer — The number of decimal places to retain after rounding. Only meaningful when rounding is not "none". Defaults to 0 (round to whole numbers).
          - `display_unit` string — A human-readable label for the converted unit shown on invoices and in the customer portal (e.g., "GB", "hours", "M tokens"). Optional. When omitted, no unit label is rendered.
        - `payment_term` 'in_advance' | 'in_arrears' — The payment term of the rate card. In advance payment term can only be used for flat prices.
        - `commitments` object — Spend commitments for this rate card. Only applicable to usage-based prices (unit, graduated, volume).
          - `minimum_amount` string — The customer is committed to spend at least the amount.
          - `maximum_amount` string — The customer is limited to spend at most the amount.
        - `discounts` object — The discounts of the rate card.
          - `percentage` number — Percentage discount applied to the price (0–100).
          - `usage` string — Number of usage units granted free before billing starts. Only applies to usage-based lines (not flat fees). Usage is treated as zero until this amount is exhausted.
        - `tax_config` object — The tax config of the rate card.
          - `behavior` 'inclusive' | 'exclusive' — Tax behavior. This enum is used to specify whether tax is included in the price or excluded from the price.
          - `code` TaxCodeReference, required — TaxCode reference.
            - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
        - `entitlement` union — The entitlement template granted to subscribers of a plan or addon containing this rate card. Requires `feature` to be set.
          - object — The entitlement template of a metered entitlement.
            - `type` 'metered', required — The type of the entitlement template.
            - `is_soft_limit` boolean — If soft limit is true, the subject can use the feature even if the entitlement is exhausted; access remains granted.
            - `limit` number, double — The amount of usage granted each usage period, in the feature's unit. Usage is counted against this allowance and the balance resets every usage period. When `is_soft_limit` is true the subject keeps access after the limit is reached; otherwise access is denied once the allowance is exhausted.
            - `usage_period` string, ISO8601 — The reset interval of the metered entitlement in ISO8601 format. Defaults to the billing cadence of the rate card.
          - object — The entitlement template of a static entitlement.
            - `type` 'static', required — The type of the entitlement template.
            - `config` unknown, required
          - object — The entitlement template of a boolean entitlement.
            - `type` 'boolean', required — The type of the entitlement template.
      - `affected_subscription_item_ids` ULID[], required — The IDs of the subscription items that this rate card belongs to.
  - `meta` PaginatedMeta, required — returns the pagination information
    - `page` PageMeta, required — Contains pagination query parameters and the total number of objects returned.
      - `number` number, required
      - `size` number, required
      - `total` number, required

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found

---

[API](https://skmtc.net/kong/apis/konnect-api-go-sdk.md) · [All operations](https://skmtc.net/kong/apis/konnect-api-go-sdk/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/kong/konnect-api-go-sdk/versions/0261aef4b1e2/schema)