> ## Documentation Index > Fetch the complete documentation index at: https://docs.costgraph.ai/llms.txt > Use this file to discover all available pages before exploring further. # Cost overview > Total spend for a period with change vs the prior equal window, plus a cost-by-provider breakdown. Defaults to month-to-date. ## OpenAPI ````yaml /api-reference/costgraph/openapi.json get /api/v1/tenant/cost/overview openapi: 3.0.0 info: description: Read and manage your CostGraph organization, spend, alerts, and settings. title: CostGraph API contact: {} version: '1.0' servers: - url: https://api.costgraph.ai security: [] tags: - name: ai x-group: AI - name: ai-serving x-group: AI serving - name: anomalies x-group: Anomalies - name: auth x-group: Auth - name: billing x-group: Billing - name: billing-export x-group: Billing export - name: budgets x-group: Budgets - name: ci x-group: CI - name: compute-recommendations x-group: Compute recommendations - name: config x-group: Config - name: cost x-group: Cost - name: gpus x-group: GPUs - name: graphai x-group: Graph AI - name: infracost x-group: Infracost - name: integrations x-group: Integrations - name: invitations x-group: Invitations - name: kubernetes-clusters x-group: Kubernetes clusters - name: marketplace x-group: Marketplace - name: network-requests x-group: Network requests - name: notifications x-group: Notifications - name: oauth x-group: OAuth - name: oauth-clients x-group: OAuth clients - name: opencost x-group: OpenCost - name: organization x-group: Audit log - name: organizations x-group: Organizations - name: placement-alternatives x-group: Placement alternatives - name: reports x-group: Reports - name: service-map x-group: Service map - name: settings x-group: Settings - name: sso x-group: Single sign-on - name: tenants x-group: Tenants - name: user x-group: Users - name: virtual-machines x-group: Virtual machines - name: virtual-tags x-group: Virtual tags - name: workflows x-group: Workflows paths: /api/v1/tenant/cost/overview: get: tags: - cost summary: Cost overview description: >- Total spend for a period with change vs the prior equal window, plus a cost-by-provider breakdown. Defaults to month-to-date. parameters: - description: Tenant ID name: X-CostGraph-Tenant-ID in: header required: true schema: type: string - description: Cost period; defaults to month_to_date name: period in: query schema: type: string enum: - month_to_date - last_7d - last_30d - calendar_month - custom - description: >- Closed calendar month in YYYY-MM format; required when period=calendar_month name: month in: query schema: type: string - description: Window start in RFC3339 format; required when period=custom name: start in: query schema: type: string - description: Window end in RFC3339 format; required when period=custom name: end in: query schema: type: string - description: >- ISO 4217 code to express every amount in, converted at each day's exchange rate; defaults to the currency most of the selected period's spend was billed in, or USD when none dominates name: reporting_currency in: query schema: type: string responses: '200': description: OK content: application/json: schema: allOf: - $ref: '#/components/schemas/responses.SuccessResponse' - type: object properties: data: $ref: '#/components/schemas/cost.Overview' '400': description: Bad Request content: application/json: schema: $ref: '#/components/schemas/responses.ErrorResponse' '500': description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/responses.ErrorResponse' security: - BearerAuth: [] components: schemas: responses.SuccessResponse: type: object required: - message - status properties: data: {} message: type: string example: some message status: type: string example: success cost.Overview: type: object required: - by_provider - currency - period - period_end - period_start - previous_cost - previous_period_end - previous_period_start - total_cost - total_cost_annual - unconverted properties: by_provider: type: array items: $ref: '#/components/schemas/cost.ProviderSpend' clusters_efficiency: type: number nullable: true cost_change_percent: type: number nullable: true currency: type: string period: type: string period_end: type: string period_start: type: string possible_savings: type: number nullable: true previous_cost: type: number previous_period_end: type: string previous_period_start: type: string total_cost: type: number total_cost_annual: type: number unconverted: type: array items: $ref: '#/components/schemas/cost.UnconvertedSpend' responses.ErrorResponse: type: object required: - message - status properties: message: type: string example: some message status: type: string example: error cost.ProviderSpend: type: object required: - by_currency - cost - percent - provider - provider_name properties: by_currency: type: array items: $ref: '#/components/schemas/cost.CurrencySpend' change_percent: type: number nullable: true cost: type: number percent: type: number provider: type: string provider_name: type: string cost.UnconvertedSpend: type: object required: - currency - native_total properties: currency: type: string native_total: type: number cost.CurrencySpend: type: object required: - converted_total - currency - native_total properties: converted_total: type: number currency: type: string native_total: type: number securitySchemes: BearerAuth: description: Enter "Bearer {token}" type: apiKey name: Authorization in: header ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.