> ## Documentation Index > Fetch the complete documentation index at: https://docs.finsync.ar/llms.txt > Use this file to discover all available pages before exploring further. # Reopen a closed period > Does not mutate the frozen snapshot in place. The day becomes open again: closing_report is cleared and is no longer the source of truth. The blotter (lines + opening) is editable. Close again to write a new snapshot. 409 if the period is already open or another period is already open (one open day per mesa). ## OpenAPI ````yaml /docs/openapi.json post /api/mesas/{id}/periods/{periodId}/reopen openapi: 3.0.0 info: title: FinSync API Documentation version: 1.0.0 description: API documentation for FinSync application contact: name: FinSync Support email: support@finsync.com servers: - url: https://api.finsync.ar description: Direct Fly API (preferred for API keys and webhooks) - url: https://finsync.ar description: Same-origin via finsync.ar (Vercel rewrite) security: - apiKey: [] tags: - name: Clients description: Operations related to clients and their accounts - name: Tags description: >- Company-scoped client labels (Configuración > Etiquetas). Distinct from the special Centro de resultados / Centro de costos tag used for budget clients. - name: Accounts description: Operations related to account balances - name: Cost Centers description: Company centros de resultados (cost_center_id) and their budgets - name: Operations description: Operations for creating and managing financial operations - name: Operation Types description: Company operation types management - name: Transaction Types description: Company transaction types management - name: WhatsApp Tools description: >- Company-scoped WhatsApp bot operation tools (Configuración > WhatsApp > Tools). Same WhatsAppOperationTool rows as the dashboard. Authenticate with x-api-key. - name: External client description: >- Exports for external (portal-linked) clients. Authenticate with `x-api-key` (company-owned client ID) or `Authorization: Bearer` (Auth.js session for an ExternalAccessGrant). - name: Mesas description: >- Company FX trading desks (mesas). Same records and paths as the dashboard Mesas module. Integrators authenticate with x-api-key; the dashboard uses an employee session. Superadmin must set mesas_enabled first; there is no public PATCH for that flag. created_by / opened_by / closed_by are null for API-key callers. - name: Home metrics description: >- Named dashboard home metrics (list + values). API keys receive the Métricas-group cards (day P&L, commissions, cost centers) without the metrics-password cookie. Employee sessions need the matching view permission; they still skip the UI password gate on this surface. paths: /api/mesas/{id}/periods/{periodId}/reopen: post: tags: - Mesas summary: Reopen a closed period description: >- Does not mutate the frozen snapshot in place. The day becomes open again: closing_report is cleared and is no longer the source of truth. The blotter (lines + opening) is editable. Close again to write a new snapshot. 409 if the period is already open or another period is already open (one open day per mesa). parameters: - in: path name: id required: true schema: type: integer description: Mesa ID - in: path name: periodId required: true schema: type: integer description: Period ID responses: '200': description: Reopened period content: application/json: schema: type: object properties: mesa: $ref: '#/components/schemas/Mesa' period: $ref: '#/components/schemas/MesaPeriod' '400': description: Invalid mesa or period ID '401': description: Unauthorized - Missing or invalid API key '403': description: >- Mesas module not enabled for this company (superadmin must set mesas_enabled). No public PATCH for that flag. content: application/json: schema: $ref: '#/components/schemas/MesasDisabledError' '404': description: Mesa or period not found '409': description: >- Period is already open (PERIOD_ALREADY_OPEN) or another period is open (OPEN_PERIOD_EXISTS) '500': description: Server error security: - apiKey: [] components: schemas: Mesa: type: object description: >- FX trading desk. created_by is null for x-api-key creates. account_ids are internal (Client.type=0) accounts unique to one mesa. properties: id: type: integer example: 1 company_id: type: integer example: 42 name: type: string example: ARS/USD desk local_currency: type: string example: ARS quote_currency: type: string example: USD costing_method: type: string enum: - fifo - wac example: wac perspective: type: string enum: - local - quote description: 'quote: Compra = quote in = engine sell. New desks default to quote.' example: quote feed_mode: type: string enum: - auto - manual description: >- manual: blotter starts empty (user confirms lines). auto: apply high-confidence Sugerir matches (exact / fx_close) as blotter lines; links never write operations. New desks default to manual. example: manual include_pending: type: boolean description: >- Off (default): Sugerir / auto-feed / infer only count completed legs. On: pending legs count too. Cancel drops the blotter line; approve keeps the same link. example: false account_ids: type: array items: type: integer example: - 10 - 11 created_by: type: integer nullable: true example: null created_at: type: string format: date-time updated_at: type: string format: date-time deleted_at: type: string format: date-time nullable: true example: id: 1 company_id: 42 name: ARS/USD desk local_currency: ARS quote_currency: USD costing_method: fifo account_ids: - 10 - 11 created_by: null created_at: '2026-03-01T00:00:00.000Z' updated_at: '2026-03-01T00:00:00.000Z' deleted_at: null MesaPeriod: type: object description: Trading session. opened_by / closed_by are null for x-api-key callers. properties: id: type: integer example: 5 mesa_id: type: integer example: 1 status: type: string enum: - open - closed opened_at: type: string format: date-time closed_at: type: string format: date-time nullable: true opening_local: type: number example: 1000000 opening_fx: type: number nullable: true example: 1200 closing_local: type: number nullable: true closing_avg_fx: type: number nullable: true pnl_local: type: number nullable: true pnl_quote: type: number nullable: true closing_report: type: object nullable: true opened_by: type: integer nullable: true example: null closed_by: type: integer nullable: true example: null created_at: type: string format: date-time updated_at: type: string format: date-time example: id: 5 mesa_id: 1 status: open opened_at: '2026-03-01T00:00:00.000Z' closed_at: null opening_local: 1000000 opening_fx: 1200 closing_local: null closing_avg_fx: null pnl_local: null pnl_quote: null closing_report: null opened_by: null closed_by: null created_at: '2026-03-01T00:00:00.000Z' updated_at: '2026-03-01T00:00:00.000Z' MesasDisabledError: type: object properties: error: type: string example: Mesas module not enabled for this company code: type: string example: MESAS_DISABLED securitySchemes: apiKey: type: apiKey in: header name: x-api-key description: API Key for authentication ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.