---
title: "Add add-on"
method: POST
path: "/{id}"
tags: ["Subscriptions"]
---

# Add add-on

`POST /{id}`

Adds a specific add-on to a subscription.

Important considerations:
* Add-ons must be compatible with the subscription's current tier
* Billing will be prorated for the remaining period

## Path parameters

- `id` string, uuid, required

## Query parameters

- `subscriptionId` string

## Response `202`

When request is accepted. Returns a 'Link' object.

- Link
  - `id` string, nullable
  - `href` string, nullable
  - `relation` string, nullable
  - `method` string, nullable

## Other responses

- `400` — When an unsupported request is made.
- `404` — When subscription or add-on with specified id does not exist.
- `500` — When an error occurs while adding the add-on.

---

[API](https://skmtc.net/smokeball/apis/api.md) · [All operations](https://skmtc.net/smokeball/apis/api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/smokeball/api/versions/197984da9b42/schema)