> ## 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. # Get add-on > Retrieve an add-on by its public ID or slug. Retrieve an add-on by its public ID or slug. ## OpenAPI ````yaml /openapi/es/rest/2026-08-27.json get /addons/{id} 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: /addons/{id}: get: tags: - Add-ons summary: Get add-on description: Retrieve an add-on by its public ID or slug. operationId: get-addon parameters: - name: id in: path 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: $ref: '#/components/schemas/Addon' example: id: addon_1a2b3c4d name: Extra API calls slug: extra-api-calls description: An additional 1,000 API calls per billing period basePrice: 1000 featureCode: api_calls featureName: API Calls createdAt: '2026-09-07T12:00:00.000Z' updatedAt: '2026-09-07T12:00:00.000Z' consumptionModel: metered includedUnits: 1000 overageRate: null creditCost: null object: addon livemode: 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 addon = await commet.addons.get({ id: "adn_xxx" }); - lang: python label: Python source: |- from commet import Commet commet = Commet("ck_xxx") addon = commet.addons.get("adn_xxx") - lang: go label: Go source: "client, err := commet.New(\"ck_xxx\")\nif err != nil {\n\tlog.Fatal(err)\n}\nctx := context.Background()\n\naddon, err := client.Addons.Get(ctx, \"adn_xxx\")\nif err != nil {\n\tlog.Fatal(err)\n}" - lang: java label: Java source: |- import co.commet.Commet; var commet = Commet.builder().apiKey("ck_xxx").build(); var addon = commet.addons().get("adn_xxx"); - lang: php label: PHP source: |- use Commet\Commet; $commet = new Commet('ck_xxx'); $addon = $commet->addons->get(id: 'adn_xxx'); components: headers: RequestId: description: >- Server-generated identifier that correlates this response with Platform logs. schema: type: string format: uuid schemas: Addon: type: object properties: id: type: string name: type: string slug: type: string description: anyOf: - type: string - type: 'null' basePrice: type: integer minimum: -9007199254740991 maximum: 9007199254740991 featureCode: type: string featureName: type: string createdAt: type: string format: date-time updatedAt: type: string format: date-time consumptionModel: type: string enum: - boolean - metered - credits - balance includedUnits: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' overageRate: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' creditCost: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' object: type: string const: addon livemode: type: boolean required: - id - name - slug - description - basePrice - featureCode - featureName - createdAt - updatedAt - consumptionModel - includedUnits - overageRate - creditCost - 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 securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key ```` ## Related topics - [Delete add-on](/docs/es/api-reference/add-ons/delete-addon.md) - [Create add-on](/docs/es/api-reference/add-ons/create-addon.md) - [Deactivate add-on](/docs/es/api-reference/add-ons/deactivate-addon.md) - [Update add-on](/docs/es/api-reference/add-ons/update-addon.md) - [Activate add-on](/docs/es/api-reference/add-ons/activate-addon.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.