openapi: 3.1.0 info: title: Orb Alerts Invoices API description: Orb is a billing platform for usage-based pricing. The API supports customers, plans, subscriptions, invoices, alerts, coupons, credit notes, and event ingestion. version: '1.0' servers: - url: https://api.withorb.com/v1 description: Orb API tags: - name: Invoices paths: /invoices: post: summary: Create a one-off invoice for a customer operationId: createInvoice requestBody: $ref: '#/components/requestBodies/Generic' responses: '200': $ref: '#/components/responses/Generic' tags: - Invoices components: responses: Generic: description: Successful response content: application/json: schema: type: object additionalProperties: true requestBodies: Generic: required: true content: application/json: schema: type: object additionalProperties: true x-generated-from: https://docs.withorb.com/llms.txt x-generated-by: claude-crawl-2026-05-08