> ## Documentation Index > Fetch the complete documentation index at: https://commet.co/docs/llms.txt > Use this file to discover all available pages before exploring further. # List active add-ons > List all active add-ons for a customer's subscription. List all active add-ons for a customer's subscription. ## OpenAPI ````yaml /openapi/en/rest/2026-08-27.json get /active-addons openapi: 3.1.0 info: title: Commet API version: '2026-08-27' description: Billing and payments API for SaaS and AI products. servers: - url: https://commet.co/api/v1 security: - ApiKeyAuth: [] tags: - name: Test Clock description: >- Simulate the passage of time in sandbox to test billing flows. Mirrors Stripe test clocks: forward-only and sandbox-only. - name: Customers - name: Subscriptions - name: Plans - name: Markets description: >- Reusable country groups for market-specific prices and selectable price variants. - name: Offers - name: Promo Codes - name: Features - name: Usage - name: Seats - name: Quota - name: Add-ons - name: Portal - name: Credit Packs - name: Plan Groups - name: Invoices - name: Payments description: >- One-time payments with no subscription or plan. Charge a customer's saved payment method off-session, or create a payment link the customer opens to pay. Tax, invoice, and receipt are handled automatically. - name: Transactions - name: Webhooks - name: API Keys - name: Payouts description: >- Withdraw available balance to your bank and manage the payout account (verification + destination bank accounts). - name: Provisioning description: >- Take ownership of an organization an agent provisioned headlessly. The agent holds the API keys from the start; a human claims the account through a claim link. paths: /active-addons: get: tags: - Add-ons summary: List active add-ons description: List all active add-ons for a customer's subscription. operationId: list-active-addons parameters: - name: customerId in: query required: true schema: type: string - name: Commet-Version in: header required: false description: >- API version used by this reference. Send this header to select this contract explicitly. schema: type: string default: '2026-08-27' example: '2026-08-27' responses: '200': description: Success headers: X-Request-Id: $ref: '#/components/headers/RequestId' RateLimit-Limit: description: Maximum number of requests allowed in the current window. schema: type: string RateLimit-Remaining: description: Requests remaining in the current window. schema: type: string content: application/json: schema: type: object properties: object: type: string const: list data: type: array items: $ref: '#/components/schemas/ActiveAddon' hasMore: type: boolean nextCursor: type: string required: - object - data - hasMore additionalProperties: false example: object: list data: - slug: extra-api-calls name: Extra API calls basePrice: 1000 featureCode: api_calls featureName: API Calls featureType: usage consumptionModel: metered activatedAt: '2026-09-07T12:00:00.000Z' object: subscription_addon livemode: false hasMore: false '400': description: Bad request headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: validation_error code: validation_error message: The request contains an invalid parameter. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/validation_error.md '401': description: Unauthorized headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: authentication_error code: unauthorized message: A valid API key is required. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/unauthorized.md '403': description: Forbidden headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: authentication_error code: forbidden message: You do not have permission to perform this operation. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/forbidden.md '404': description: Not found headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: not_found_error code: not_found message: The requested resource was not found. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/not_found.md '429': description: Too many requests headers: X-Request-Id: $ref: '#/components/headers/RequestId' RateLimit-Limit: description: Maximum number of requests allowed in the current window. schema: type: string RateLimit-Remaining: description: Requests remaining in the current window. schema: type: string RateLimit-Reset: description: Seconds until the rate limit window resets. schema: type: string Retry-After: description: Seconds to wait before retrying the request. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: rate_limit_error code: rate_limited message: >- Too many requests. Retry after the interval specified in the Retry-After header. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/rate_limited.md '500': description: Internal server error headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: type: internal_error code: internal_error message: An unexpected error occurred while processing the request. doc_url: >- https://commet.co/docs/api-reference/2026-08-27/errors/internal_error.md x-codeSamples: - lang: typescript label: TypeScript source: >- import { Commet } from "@commet/node"; const commet = new Commet({ apiKey: "ck_xxx" }); const response = await commet.addons.listActive({ customerId: "user_123" }); - lang: python label: Python source: >- from commet import Commet commet = Commet("ck_xxx") addons_list_active_result = commet.addons.list_active(customer_id="user_123") - lang: go label: Go source: "client, err := commet.New(\"ck_xxx\")\nif err != nil {\n\tlog.Fatal(err)\n}\nctx := context.Background()\n\naddonsListActiveResult, err := client.Addons.ListActive(ctx, &commet.ListActiveAddonsParams{\n\tCustomerID: \"user_123\",\n})\nif err != nil {\n\tlog.Fatal(err)\n}" - lang: java label: Java source: |- import co.commet.Commet; import co.commet.params.ListActiveAddonsParams; var commet = Commet.builder().apiKey("ck_xxx").build(); var addonsListActiveResult = commet.addons().listActive( ListActiveAddonsParams.builder("user_123").build() ); - lang: php label: PHP source: >- use Commet\Commet; $commet = new Commet('ck_xxx'); $addonsListActiveResult = $commet->addons->listActive(customerId: 'user_123'); components: headers: RequestId: description: >- Server-generated identifier that correlates this response with Platform logs. schema: type: string format: uuid schemas: ActiveAddon: type: object properties: slug: type: string name: type: string basePrice: type: integer minimum: -9007199254740991 maximum: 9007199254740991 featureCode: type: string featureName: type: string featureType: $ref: '#/components/schemas/FeatureType' consumptionModel: type: string enum: - boolean - metered - credits - balance activatedAt: type: string format: date-time object: type: string const: subscription_addon livemode: type: boolean required: - slug - name - basePrice - featureCode - featureName - featureType - consumptionModel - activatedAt - object - livemode additionalProperties: false ErrorResponse: type: object properties: error: type: object properties: type: type: string code: type: string message: type: string param: type: string details: {} doc_url: type: string required: - type - code - message - doc_url additionalProperties: false required: - error additionalProperties: false FeatureType: type: string enum: - boolean - usage - seats - quota securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key ```` ## Related topics - [Add-ons](/docs/add-ons.md) - [List add-ons](/docs/api-reference/add-ons/list-addons.md) - [addon_not_active](/docs/api-reference/errors/addon_not_active.md) - [Delete add-on](/docs/api-reference/add-ons/delete-addon.md) - [Update add-on](/docs/api-reference/add-ons/update-addon.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.