---
title: "Get add-on"
method: GET
path: "/openmeter/addons/{addonId}"
tags: ["OpenMeter Product Catalog"]
---

# Get add-on

`GET /openmeter/addons/{addonId}`

Get add-on by id.

## Path parameters

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

## Response `200`

Addon response.

- Addon — Add-on allows extending subscriptions with compatible plans with additional ratecards.
  - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
  - `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 "_".
  - `created_at` string, date-time, required — [RFC3339](https://tools.ietf.org/html/rfc3339) formatted date-time string in UTC.
  - `updated_at` string, date-time, required — [RFC3339](https://tools.ietf.org/html/rfc3339) formatted date-time string in UTC.
  - `deleted_at` string, date-time — [RFC3339](https://tools.ietf.org/html/rfc3339) formatted date-time string in UTC.
  - `key` string, required — A key is a unique string that is used to identify a resource.
  - `version` integer, required — Version of the add-on. Incremented when the add-on is updated.
  - `instance_type` 'single' | 'multiple', required — The instanceType of the add-on. - `single`: Can be added to a subscription only once. - `multiple`: Can be added to a subscription more than once.
  - `currency` string, required — Three-letter [ISO4217](https://www.iso.org/iso-4217-currency-codes.html) currency code. Custom three-letter currency codes are also supported for convenience.
  - `effective_from` string, date-time — [RFC3339](https://tools.ietf.org/html/rfc3339) formatted date-time string in UTC.
  - `effective_to` string, date-time — [RFC3339](https://tools.ietf.org/html/rfc3339) formatted date-time string in UTC.
  - `status` 'draft' | 'active' | 'archived', required — The status of the add-on defined by the `effective_from` and `effective_to` properties. - `draft`: The add-on has not yet been published and can be edited. - `active`: The add-on is published and available for use. - `archived`: The add-on is no longer available for use.
  - `rate_cards` BillingRateCard[], required — The rate cards of the add-on.
    - `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` FeatureReferenceItem — Feature reference.
      - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
    - `billing_cadence` string, ISO8601 — [ISO 8601 Duration](https://docs.digi.com/resources/documentation/digidocs/90001488-13/reference/r_iso_8601_duration_format.htm) string.
    - `price` union, required — Price.
      - 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 — Numeric represents an arbitrary precision number.
      - 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 — Numeric represents an arbitrary precision number.
      - 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.
          - `up_to_amount` string — Numeric represents an arbitrary precision number.
          - `flat_price` BillingPriceFlat — Flat price.
            - `type` 'flat', required — The type of the price.
            - `amount` string, required — Numeric represents an arbitrary precision number.
          - `unit_price` BillingPriceUnit — 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 — Numeric represents an arbitrary precision number.
      - 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.
          - `up_to_amount` string — Numeric represents an arbitrary precision number.
          - `flat_price` BillingPriceFlat — Flat price.
            - `type` 'flat', required — The type of the price.
            - `amount` string, required — Numeric represents an arbitrary precision number.
          - `unit_price` BillingPriceUnit — 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 — Numeric represents an arbitrary precision number.
    - `payment_term` 'in_advance' | 'in_arrears' — The payment term of a flat price.
    - `commitments` BillingSpendCommitments — Spend commitments for a rate card. The customer is committed to spend at least the minimum amount and at most the maximum amount.
      - `minimum_amount` string — Numeric represents an arbitrary precision number.
      - `maximum_amount` string — Numeric represents an arbitrary precision number.
    - `discounts` BillingRateCardDiscounts — Discount configuration for a rate card.
      - `percentage` number — Percentage discount applied to the price (0–100).
      - `usage` string — Numeric represents an arbitrary precision number.
    - `tax_config` BillingRateCardTaxConfig — 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` TaxCodeReferenceItem, required — TaxCode reference.
        - `id` string, required — ULID (Universally Unique Lexicographically Sortable Identifier).
    - `entitlement` union — Entitlement template configured on a rate card. The feature is taken from the rate card itself, so it is omitted here.
      - 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 — [ISO 8601 Duration](https://docs.digi.com/resources/documentation/digidocs/90001488-13/reference/r_iso_8601_duration_format.htm) string.
      - 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.
  - `validation_errors` ProductCatalogValidationError[] — List of validation errors.
    - `code` string, required — Machine-readable error code.
    - `message` string, required — Human-readable description of the error.
    - `attributes` object — Additional structured context.
    - `field` string, required — The path to the field.

## Other responses

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

## Changes

- **2026-06-11** (v3) `2d8689050773` — 1 info
  - added the optional property `rate_cards/items/entitlement` to the response with the `200` status
- **2026-05-11** (v3) `9d0042cb3815` — 2 warning, 2 info
  - removed the optional property `rate_cards/items/entitlement` from the response with the `200` status
  - removed the optional property `rate_cards/items/unit_config` from the response with the `200` status
  - added `#/components/schemas/FeatureReferenceItem` to the `rate_cards/items/feature` response property `allOf` list for the response status `200`
  - removed `#/components/schemas/FeatureReference` from the `rate_cards/items/feature` response property `allOf` list for the response status `200`

[Change history](https://skmtc.dev/openmeterio/apis/openmeter-api/changes/openmeter/addons/:addonId/get.md)

---

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