> ## Documentation Index > Fetch the complete documentation index at: https://docs.roark.ai/llms.txt > Use this file to discover all available pages before exploring further. # Get usage & cost > Report billable usage and cost for the organization over a time window, broken down by project (highest spend first). Pass `from`/`to` as ISO 8601 timestamps; optionally pass `projectId` to scope the report to one project. Amounts are billable spend only (what we absorb is never included). Authenticated by an organization API key with the `usage:read` permission. ## OpenAPI ````yaml /api-reference/openapi.documented.json get /v1/usage openapi: 3.1.0 info: title: Roark Analytics API description: >- The Roark Analytics API gives you access to the same API that powers the award winning Roark Analytics platform. version: 1.0.0 servers: - description: Production url: https://api.roark.ai security: - Bearer: [] tags: - name: Agent - name: Agent Endpoint - name: Call - name: Chat - name: Metric - name: Metric Policy - name: Metric Collection Job - name: Customer Flow - name: Customer Flow Edge Case - name: Simulation - name: Simulation Persona - name: Simulation Environment - name: Simulation Scenario - name: Simulation Run Plan - name: Simulation Template - name: Simulation Run Plan Job - name: Simulation Job - name: HTTP Request Definition - name: Webhook - name: Issue - name: Autoimprove - name: Agent Config - name: Knowledge Base - name: Config - name: Organization Project - name: Organization Project Member - name: Organization Project API Key - name: Organization Config - name: CLI Auth - name: Me - name: Project - name: Usage - name: Benchmark - name: Health - name: Prospect Simulation paths: /v1/usage: get: tags: - Usage summary: Get usage & cost description: >- Report billable usage and cost for the organization over a time window, broken down by project (highest spend first). Pass `from`/`to` as ISO 8601 timestamps; optionally pass `projectId` to scope the report to one project. Amounts are billable spend only (what we absorb is never included). Authenticated by an organization API key with the `usage:read` permission. operationId: getV1Usage parameters: - in: query name: from schema: type: string format: date-time description: Start of the window (inclusive), ISO 8601. example: '2026-09-01T00:00:00Z' required: true - in: query name: to schema: type: string format: date-time description: >- End of the window (exclusive), ISO 8601. Must be after `from`, and the window may not exceed 366 days. example: '2026-10-01T00:00:00Z' required: true - in: query name: projectId schema: type: string format: uuid description: >- Limit the report to a single project. Omit for the whole organization. required: false responses: '200': description: The usage & cost report for the window content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/UsageReport' required: - data '400': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Validation error example: type: validation code: invalid_parameter message: The request was invalid param: email description: Bad Request '401': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Authentication error example: type: authentication code: unauthorized message: Authentication required description: Unauthorized '403': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Permission error example: type: forbidden code: permission_denied message: You do not have permission to access this resource description: Forbidden '500': content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' description: Server error example: type: internal code: internal_error message: Internal server error description: Internal Server Error components: schemas: UsageReport: type: object properties: from: type: string description: The resolved window start, echoed back as ISO 8601. to: type: string description: The resolved window end, echoed back as ISO 8601. currency: type: string const: usd totalUsdMicros: type: integer description: >- Total billable spend across the organization (or the single project) in micro-dollars. totalUsd: type: number description: The same total in US dollars. projects: type: array items: $ref: '#/components/schemas/UsageProjectCost' description: >- Per-project billable spend, highest first. Only projects with spend in the window appear. required: - from - to - currency - totalUsdMicros - totalUsd - projects ErrorResponse: type: object properties: type: type: string enum: - validation - authentication - forbidden - not_found - conflict - payment_required - rate_limit - internal description: The error type category examples: - validation - authentication code: type: string description: Machine-readable error code identifier examples: - invalid_parameter - missing_required_field - unauthorized message: type: string description: Human-readable error message examples: - The request was invalid - Authentication required param: type: string description: The parameter that caused the error (if applicable) examples: - email - user_id details: description: Additional error context information required: - type - code - message UsageProjectCost: type: object properties: projectId: type: string format: uuid projectName: type: - string - 'null' description: Null only if the project no longer exists in this organization. amountUsdMicros: type: integer description: >- Billable spend in integer micro-dollars (1,000,000 = $1). The exact value. amountUsd: type: number description: >- The same billable spend in US dollars. For display; use amountUsdMicros to reconcile. required: - projectId - projectName - amountUsdMicros - amountUsd securitySchemes: Bearer: type: http scheme: bearer bearerFormat: JWT ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.