> ## Documentation Index > Fetch the complete documentation index at: https://checkfu.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Read a runner pool's work-queue stats > Returns the backlog a fleet operator scales and alerts on for one explicit RunnerPool: `depth` (advertised Runs this pool may claim that no Runner is holding), `unpinned_depth` (the share of that depth pinned to no pool and therefore claimable by any, D170 — so depths do not sum across pools), `claimed_unacked` (claimed by a Runner and not yet settled), `oldest_queued_at` (the earliest advertisement across both, null when the queue is empty), and `runners_recently_seen` (Runners in this pool with unexpired presence — Checkfu Runners announce rather than poll, and presence expires after a 30-second TTL). Subtract `oldest_queued_at` from `measured_at` for the age; nothing is precomputed against a hidden clock. Every number is a read-only projection over scheduling state — reading it never claims, holds, or expires work, and a stale read costs a scaling decision, never a Run. An unknown pool, or one in another workspace, is `validation.not_found`. Checkfu support posture: preview; rollout_fenced. Required evidence journey: managed-runner. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities. ## OpenAPI ````yaml /openapi.json get /v1/runner-pools/{id}/work-stats openapi: 3.1.0 info: title: Checkfu API version: '2026-08-27' description: >- Authentication is declared per operation: API-key, runtime, or connector bearer; Automation signature; or credential-free pairing redemption. Every general Checkfu REST request requires the dated `Checkfu-Version` header (one of: 2026-08-27); 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: agentSources - name: skillProposals - name: instructionProposals - name: catalog - name: concepts - name: support - name: connections - name: connectionVaults - name: connectionAssignments - name: connectedRuntimes - name: projects - name: collaboration - name: automationGraphs - name: automations - name: actionApprovals - name: standingApprovals - 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: agentDeployments - name: workEnvironments - name: computers - name: computerScreens - name: computerBrowserObservations - name: computerBrowserActions - name: environments - name: vaults - name: apiMcp - name: a2a paths: /v1/runner-pools/{id}/work-stats: get: tags: - runnerPools summary: Read a runner pool's work-queue stats description: >- Returns the backlog a fleet operator scales and alerts on for one explicit RunnerPool: `depth` (advertised Runs this pool may claim that no Runner is holding), `unpinned_depth` (the share of that depth pinned to no pool and therefore claimable by any, D170 — so depths do not sum across pools), `claimed_unacked` (claimed by a Runner and not yet settled), `oldest_queued_at` (the earliest advertisement across both, null when the queue is empty), and `runners_recently_seen` (Runners in this pool with unexpired presence — Checkfu Runners announce rather than poll, and presence expires after a 30-second TTL). Subtract `oldest_queued_at` from `measured_at` for the age; nothing is precomputed against a hidden clock. Every number is a read-only projection over scheduling state — reading it never claims, holds, or expires work, and a stale read costs a scaling decision, never a Run. An unknown pool, or one in another workspace, is `validation.not_found`. Checkfu support posture: preview; rollout_fenced. Required evidence journey: managed-runner. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities. operationId: runnerPools.getRunnerPoolWorkQueueStats parameters: - name: id in: path schema: $ref: '#/components/schemas/RunnerPoolId' required: true - name: checkfu-version in: header schema: type: string enum: - '2026-08-27' required: true responses: '200': description: Success content: application/json: schema: type: object properties: runner_pool: $ref: '#/components/schemas/RunnerPoolId' depth: type: integer allOf: - minimum: 0 unpinned_depth: type: integer allOf: - minimum: 0 claimed_unacked: type: integer allOf: - minimum: 0 oldest_queued_at: anyOf: - type: string - type: 'null' runners_recently_seen: type: integer allOf: - minimum: 0 measured_at: type: string required: - runner_pool - depth - unpinned_depth - claimed_unacked - oldest_queued_at - runners_recently_seen - measured_at additionalProperties: false 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: type: object required: - error 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 additionalProperties: false '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' '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: $ref: '#/components/schemas/RuntimeInternalError' security: - bearerAuth: [] components: schemas: RunnerPoolId: type: string allOf: - pattern: ^rpool_[0-9a-f]{32}$ WorkspaceId: type: string allOf: - pattern: ^wrkspc_[0-9a-f]{32}$ 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. 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. securitySchemes: bearerAuth: type: http scheme: bearer ````