> ## Documentation Index > Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-docsfi-1782565220-3e5e53a.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Get Engine LCU consumed during the free trial > Returns the org-wide sum of priced Engine LCU consumed strictly before the GA cutoff (2026-06-01 UTC), i.e. all usage that was free, plus the count of projects that had Engine configured. Used to show admins how much they would have been billed and across how many projects when deciding whether to continue. The LCU value is Postgres-only (no in-flight Redis merge) since the post-cutoff modal shows after all pre-cutoff usage is swept. ## OpenAPI ````yaml /langsmith/langsmith-platform-openapi.json get /v1/platform/engine/trial-lcu-total openapi: 3.1.0 info: title: LangSmith description: >+ The LangSmith API is used to programmatically create and manage LangSmith resources. ## Host https://api.smith.langchain.com ## Authentication To authenticate with the LangSmith API, set the `X-Api-Key` header to a valid [LangSmith API key](https://docs.langchain.com/langsmith/create-account-api-key#create-an-api-key). version: 0.1.0 servers: - url: / security: [] tags: - name: run x-group: Tracing - name: runs x-group: Tracing - name: sessions x-group: Tracing - name: tracer-sessions x-group: Tracing - name: datasets x-group: Datasets - name: examples x-group: Datasets - name: evaluators x-group: Evaluation - name: experiment-view-overrides x-group: Evaluation - name: experiments x-group: Evaluation - name: annotation-queues x-group: Feedback & Annotation - name: annotation_queues x-group: Feedback & Annotation - name: feedback x-group: Feedback & Annotation - name: feedback-configs x-group: Feedback & Annotation - name: alert_rules x-group: Monitoring - name: bulk-exports x-group: Monitoring - name: charts x-group: Monitoring - name: commits x-group: Prompts & Playground - name: directories x-group: Prompts & Playground - name: hub_environments x-group: Prompts & Playground - name: playground-settings x-group: Prompts & Playground - name: prompt-webhooks x-group: Prompts & Playground - name: prompts x-group: Prompts & Playground - name: tag-transitions x-group: Prompts & Playground - name: comments x-group: Prompt Hub - name: likes x-group: Prompt Hub - name: optimization-jobs x-group: Prompt Hub - name: ownerships x-group: Prompt Hub - name: repos x-group: Prompt Hub - name: settings x-group: Prompt Hub - name: tags x-group: Prompt Hub - name: integrations x-group: Integrations & Tools - name: mcp x-group: Integrations & Tools - name: mcp_vendors x-group: Integrations & Tools - name: oauth x-group: Integrations & Tools - name: tools x-group: Integrations & Tools - name: gateway-policies x-group: LLM Gateway - name: sandboxes x-group: Sandboxes - name: issues x-group: Issues - name: issues-agent x-group: Issues - name: Organizations x-group: Administration - name: SCIM Tokens x-group: Administration - name: TTL Settings x-group: Administration - name: access_policies x-group: Administration - name: api-key x-group: Administration - name: audit-logs x-group: Administration - name: auth x-group: Administration - name: aws_marketplace x-group: Administration - name: data_planes x-group: Administration - name: me x-group: Administration - name: orgs x-group: Administration - name: service-accounts x-group: Administration - name: tenant x-group: Administration - name: ttl-settings x-group: Administration - name: usage-limits x-group: Administration - name: workspaces x-group: Administration - name: ace x-group: System - name: backfills x-group: System - name: features x-group: System - name: info x-group: System - name: model-price-map x-group: System - name: public x-group: System - name: fleet secrets - name: fleet tenants - name: fleet users paths: /v1/platform/engine/trial-lcu-total: get: tags: - issues-agent summary: Get Engine LCU consumed during the free trial description: |- Returns the org-wide sum of priced Engine LCU consumed strictly before the GA cutoff (2026-06-01 UTC), i.e. all usage that was free, plus the count of projects that had Engine configured. Used to show admins how much they would have been billed and across how many projects when deciding whether to continue. The LCU value is Postgres-only (no in-flight Redis merge) since the post-cutoff modal shows after all pre-cutoff usage is swept. parameters: [] responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/issues_agent_usage.TrialLCUTotalResponse' '400': description: Bad Request content: application/json: schema: $ref: '#/components/schemas/issues_agent_usage.LCUSpendErrorResponse' '403': description: Forbidden content: application/json: schema: $ref: '#/components/schemas/issues_agent_usage.LCUSpendErrorResponse' '500': description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/issues_agent_usage.LCUSpendErrorResponse' security: - API Key: [] - Organization ID: [] - Bearer Auth: [] components: schemas: issues_agent_usage.TrialLCUTotalResponse: type: object properties: lcu_total: type: string project_count: type: integer issues_agent_usage.LCUSpendErrorResponse: type: object properties: error: type: string securitySchemes: API Key: type: apiKey in: header name: X-API-Key Organization ID: type: apiKey in: header name: X-Organization-Id Bearer Auth: type: http description: >- Bearer tokens are used to authenticate from the UI. Must also specify x-tenant-id or x-organization-id (for org scoped apis). scheme: bearer ````