> ## Documentation Index > Fetch the complete documentation index at: https://docs.checkfu.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Project usage > Read usage-series rows for the project dimension filtered to this Project. ## OpenAPI ````yaml /openapi.json get /v1/projects/{id}/usage openapi: 3.1.0 info: title: Checkfu API version: '2026-08-31' description: >- Authentication is declared per operation: API-key, runtime, or connector bearer; Automation signature; bootstrap poll token; or anonymous bootstrap creation and credential-free pairing redemption. Every general Checkfu REST request requires the dated `Checkfu-Version` header (one of: 2026-08-31); the three MCP JSON-RPC transports use `MCP-Protocol-Version`, A2A uses `A2A-Version`, and the provider OAuth callback carries neither Checkfu header. API keys resolve one Workspace without a request selector; authenticated responses identify it with `Checkfu-Workspace-Id`. servers: - url: https://api.checkfu.com security: - bearerAuth: [] tags: - name: organizations - name: sourceRepositories - name: tenants - name: workspaces - name: principals - name: principalGroups - name: principalAccessCredentials - name: apiKeys - name: agents - name: harnesses - name: harnessRuntime - name: computerProfiles - name: permissionAssignments - name: actionPolicies - name: files - name: memoryStores - name: dreams - name: modelCredentials - name: modelRoutingProfiles - name: blueprintInstallations - name: toolSources - name: skills - name: skillSources - name: agentBlueprints - name: skillProposals - name: instructionProposals - name: catalog - name: concepts - name: support - name: bootstrapRequests - name: connections - name: connectionVaults - name: connectionAssignments - name: connectedRuntimes - name: fileTrees - name: collaboration - name: automationGraphs - name: automations - name: projects - name: actionApprovals - name: standingApprovals - name: workloadReviewPolicies - name: usage - name: models - name: outcomes - name: budgets - name: billing - name: sessions - name: audit - name: sessionExports - name: runs - name: runnerPools - name: transcripts - name: sessionWatches - name: sessionHandoffs - name: sessionCapsules - name: sessionTrajectories - name: webhookEndpoints - name: integrationGateway - name: workEnvironments - name: computers - name: computerScreens - name: computerBrowserObservations - name: computerBrowserActions - name: environments - name: computerHeadlessOperations - name: vaults - name: apiMcp - name: a2a paths: /v1/projects/{id}/usage: get: tags: - projects summary: Get Project usage description: >- Read usage-series rows for the `project` dimension filtered to this Project. Density is computed on the workspace-wide fact set before the Project filter; Computer grouping for `project` is `not_applicable` and returns no Computer buckets. `view` on the Project is required plus the usage read authority Sessions already require. Native child threads are inside their Session's totals and are never counted again. Checkfu support posture: alpha; hosted. No release evidence journey applies to this operation. operationId: projects.getProjectUsage parameters: - name: id in: path schema: $ref: '#/components/schemas/ProjectId' required: true - name: checkfu-version in: header schema: type: string enum: - '2026-08-31' required: true - name: from in: query schema: $ref: '#/components/schemas/UsageSeriesTimestamp' required: true - name: to in: query schema: $ref: '#/components/schemas/UsageSeriesTimestamp' required: true - name: monetary_view in: query schema: type: string enum: - event_time - accounting_time required: false - name: display_timezone in: query schema: $ref: '#/components/schemas/UsageSeriesDisplayTimeZone' required: false responses: '200': description: Success content: application/json: schema: $ref: '#/components/schemas/Objects_158' headers: checkfu-workspace-id: description: The Workspace resolved from the authenticated bearer credential. required: true schema: $ref: '#/components/schemas/WorkspaceId' '400': description: Typed Checkfu wire error content: application/json: schema: $ref: '#/components/schemas/ValidationMalformedError' '401': description: Typed Checkfu wire error content: application/json: schema: type: object required: - error properties: error: type: object required: - type - message - more properties: type: type: string enum: - auth.invalid_key message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#auth-invalid-key description: >- Stable public documentation and remedy for this error type. additionalProperties: false additionalProperties: false '403': description: >- The organization, tenant, or workspace backing this key is administratively disabled. | Deployment governance or retention policy denied the request. content: application/json: schema: anyOf: - type: object required: - error properties: error: type: object properties: type: type: string enum: - auth.disabled_tenancy message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#auth-disabled-tenancy description: >- Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false additionalProperties: false - $ref: '#/components/schemas/PolicyDeniedError' '404': description: >- The requested resource does not exist in the resolved deployment boundary. content: application/json: schema: $ref: '#/components/schemas/ValidationNotFoundError' '422': description: >- The read selects more immutable facts than one response can safely decode. content: application/json: schema: $ref: '#/components/schemas/ValidationRangeTooLargeError' '429': description: Typed Checkfu wire error headers: retry-after: description: >- Delay in seconds for rate limits or deployment quotas with a known release or UTC reset boundary required: false schema: type: integer minimum: 1 content: application/json: schema: type: object required: - error properties: error: type: object required: - type - message - more properties: type: type: string enum: - budget.exceeded message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#budget-exceeded description: >- Stable public documentation and remedy for this error type. additionalProperties: false additionalProperties: false '500': description: >- An unexpected internal failure occurred; the message contains an opaque incident reference. content: application/json: schema: $ref: '#/components/schemas/RuntimeInternalError' security: - bearerAuth: [] components: schemas: ProjectId: type: string allOf: - pattern: ^proj_[0-9a-f]{32}$ UsageSeriesTimestamp: type: string allOf: - maxLength: 24 - pattern: ^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$ description: >- A canonical UTC ISO-8601 usage-series timestamp with millisecond precision. UsageSeriesDisplayTimeZone: type: string allOf: - minLength: 1 - maxLength: 255 Objects_158: type: object properties: from: $ref: '#/components/schemas/UsageSeriesTimestamp' to: $ref: '#/components/schemas/UsageSeriesTimestamp' as_of: $ref: '#/components/schemas/UsageSeriesTimestamp' bucket: type: string enum: - day monetary_view: $ref: '#/components/schemas/Union_317' display_timezone: $ref: '#/components/schemas/UsageSeriesDisplayTimeZone' revision: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' watermark: type: object properties: as_of: $ref: '#/components/schemas/UsageSeriesTimestamp' status: type: string enum: - current - partial required: - as_of - status additionalProperties: false usage: type: array items: type: object properties: bucket_start: $ref: '#/components/schemas/UsageSeriesTimestamp' bucket_end: $ref: '#/components/schemas/UsageSeriesTimestamp' incomplete: type: boolean spend_status: type: string enum: - complete - partial - not_applicable group: type: string allOf: - minLength: 1 - maxLength: 255 totals: type: object properties: input_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' cached_input_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' cache_write_input_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' output_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' reasoning_output_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' total_tokens: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' active_ms: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' running_ms: $ref: >- #/components/schemas/UsageSeriesNonNegativeSafeIntegerEncoded requests: $ref: >- #/components/schemas/UsageSeriesNonNegativeSafeIntegerEncoded storage_mib_ms: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' fact_count: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' late_fact_count: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' spend_coverage: type: object properties: charged: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' unpriced: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' byok: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' unknown: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' required: - charged - unpriced - byok - unknown additionalProperties: false required: - input_tokens - cached_input_tokens - cache_write_input_tokens - output_tokens - reasoning_output_tokens - total_tokens - active_ms - storage_mib_ms - fact_count - late_fact_count - spend_coverage additionalProperties: false required: - bucket_start - bucket_end - incomplete - spend_status - group - totals additionalProperties: false computer: type: array items: $ref: '#/components/schemas/UsageSeriesComputerBucket' spend: type: array items: type: object properties: bucket_start: $ref: '#/components/schemas/UsageSeriesTimestamp' bucket_end: $ref: '#/components/schemas/UsageSeriesTimestamp' incomplete: type: boolean spend_status: type: string enum: - complete - partial group: type: string allOf: - minLength: 1 - maxLength: 255 currency: type: string enum: - usd exact_picousd: type: string allOf: - pattern: ^-?\d+$ required: - bucket_start - bucket_end - incomplete - spend_status - group - currency - exact_picousd additionalProperties: false required: - from - to - as_of - bucket - monetary_view - display_timezone - revision - watermark - usage - computer - spend additionalProperties: false WorkspaceId: type: string allOf: - pattern: ^wrkspc_[0-9a-f]{32}$ ValidationMalformedError: type: object properties: error: type: object properties: type: type: string enum: - validation.malformed message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#validation-malformed description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- The request could not be decoded or violated a declared input constraint. PolicyDeniedError: type: object properties: error: type: object properties: type: type: string enum: - policy.denied message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#policy-denied description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: Deployment governance or retention policy denied the request. ValidationNotFoundError: type: object properties: error: type: object properties: type: type: string enum: - validation.not_found message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#validation-not-found description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- The requested resource does not exist in the resolved deployment boundary. ValidationRangeTooLargeError: type: object properties: error: type: object properties: type: type: string enum: - validation.range_too_large message: type: string more: type: string enum: - >- https://docs.checkfu.com/reference/errors#validation-range-too-large description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- The read selects more immutable facts than one response can safely decode. RuntimeInternalError: type: object properties: error: type: object properties: type: type: string enum: - runtime.internal message: type: string more: type: string enum: - https://docs.checkfu.com/reference/errors#runtime-internal description: Stable public documentation and remedy for this error type. required: - type - message - more additionalProperties: false required: - error additionalProperties: false description: >- An unexpected internal failure occurred; the message contains an opaque incident reference. Union_317: type: string enum: - event_time - accounting_time UsageSeriesNonNegativeSafeInteger: type: integer UsageSeriesNonNegativeSafeIntegerEncoded: anyOf: - $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' - type: 'null' UsageSeriesComputerBucket: type: object properties: bucket_start: $ref: '#/components/schemas/UsageSeriesTimestamp' bucket_end: $ref: '#/components/schemas/UsageSeriesTimestamp' incomplete: type: boolean group: type: string allOf: - minLength: 1 - maxLength: 255 dimension: $ref: '#/components/schemas/Union_318' quantity: type: string fact_count: type: integer allOf: - exclusiveMinimum: 0 late_fact_count: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' final_count: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' provisional_count: $ref: '#/components/schemas/UsageSeriesNonNegativeSafeInteger' required: - bucket_start - bucket_end - incomplete - group - dimension - quantity - fact_count - late_fact_count - final_count - provisional_count additionalProperties: false Union_318: type: string enum: - compute_seconds - screen_seconds - storage_mib_seconds securitySchemes: bearerAuth: type: http scheme: bearer ````