> ## 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 invoice > Retrieve a single invoice by its public ID, including line items. Retrieve a single invoice by its public ID, including line items. ## OpenAPI ````yaml /openapi/es/rest/2026-08-27.json get /invoices/{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: /invoices/{id}: get: tags: - Invoices summary: Get invoice description: Retrieve a single invoice by its public ID, including line items. operationId: get-invoice 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/Invoice' example: id: inv_1a2b3c4d customerId: cus_1a2b3c4d subscriptionId: sub_1a2b3c4d invoiceNumber: INV-2026-0001 status: paid invoiceType: recurring currency: usd subtotal: 2000 discountAmount: 0 taxAmount: 0 total: 2000 periodStart: '2026-09-07T12:00:00.000Z' periodEnd: '2026-10-07T12:00:00.000Z' issueDate: '2026-09-07T12:00:00.000Z' dueDate: '2026-09-07T12:00:00.000Z' memo: null metadata: {} createdAt: '2026-09-07T12:00:00.000Z' updatedAt: '2026-09-07T12:00:00.000Z' creditApplied: 0 planName: Pro poNumber: null reference: null lineItems: - lineType: plan_base featureName: null description: Pro — monthly subscription quantity: 1 unitAmount: 2000 amount: 2000 includedAmount: null usedAmount: null overageAmount: null discountType: null discountValue: null discountName: null chargeType: standard object: invoice 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 invoice = await commet.invoices.get({ id: "inv_xxx" }); - lang: python label: Python source: |- from commet import Commet commet = Commet("ck_xxx") invoice = commet.invoices.get("inv_xxx") - lang: go label: Go source: "client, err := commet.New(\"ck_xxx\")\nif err != nil {\n\tlog.Fatal(err)\n}\nctx := context.Background()\n\ninvoice, err := client.Invoices.Get(ctx, \"inv_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 invoice = commet.invoices().get("inv_xxx"); - lang: php label: PHP source: |- use Commet\Commet; $commet = new Commet('ck_xxx'); $invoice = $commet->invoices->get(id: 'inv_xxx'); components: headers: RequestId: description: >- Server-generated identifier that correlates this response with Platform logs. schema: type: string format: uuid schemas: Invoice: type: object properties: id: type: string customerId: type: string subscriptionId: anyOf: - type: string - type: 'null' invoiceNumber: type: string status: type: string enum: - draft - outstanding - paid - void - uncollectible invoiceType: $ref: '#/components/schemas/InvoiceType' currency: type: string subtotal: type: integer minimum: -9007199254740991 maximum: 9007199254740991 discountAmount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 taxAmount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 total: type: integer minimum: -9007199254740991 maximum: 9007199254740991 periodStart: type: string format: date-time periodEnd: type: string format: date-time issueDate: type: string format: date-time dueDate: type: string format: date-time memo: anyOf: - type: string - type: 'null' metadata: type: object propertyNames: type: string additionalProperties: {} createdAt: type: string format: date-time updatedAt: type: string format: date-time creditApplied: type: integer minimum: -9007199254740991 maximum: 9007199254740991 planName: anyOf: - type: string - type: 'null' poNumber: anyOf: - type: string - type: 'null' reference: anyOf: - type: string - type: 'null' lineItems: type: array items: type: object properties: lineType: type: string enum: - plan_base - feature_overage - feature_seats - feature_quota - discount - promo_code_discount - credit - balance_overage - addon_base - one_time featureName: anyOf: - type: string - type: 'null' description: type: string quantity: type: integer minimum: -9007199254740991 maximum: 9007199254740991 unitAmount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 amount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 includedAmount: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' usedAmount: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' overageAmount: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' discountType: anyOf: - type: string - type: 'null' discountValue: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' discountName: anyOf: - type: string - type: 'null' chargeType: type: string enum: - standard - advance - true_up required: - lineType - featureName - description - quantity - unitAmount - amount - includedAmount - usedAmount - overageAmount - discountType - discountValue - discountName - chargeType additionalProperties: false object: type: string const: invoice livemode: type: boolean required: - id - customerId - subscriptionId - invoiceNumber - status - invoiceType - currency - subtotal - discountAmount - taxAmount - total - periodStart - periodEnd - issueDate - dueDate - memo - metadata - createdAt - updatedAt - creditApplied - planName - poNumber - reference - lineItems - 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 InvoiceType: type: string enum: - recurring - overage - plan_change - adjustment - credit_purchase - balance_topup - addon_activation - one_time_payment - reactivation - resume securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key ```` ## Related topics - [List invoices](/docs/es/api-reference/invoices/list-invoices.md) - [Get transaction](/docs/es/api-reference/transactions/get-transaction.md) - [invoice.created](/docs/es/webhooks/invoice-created.md) - [invoice.overdue](/docs/es/webhooks/invoice-overdue.md) - [invoice.voided](/docs/es/webhooks/invoice-voided.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.