> ## Documentation Index > Fetch the complete documentation index at: https://docs.filexpress.app/llms.txt > Use this file to discover all available pages before exploring further. # Close cash register > Closes the cash register with the declared cash and calculates the difference against the expected amount. Records the `user_id` sent as the closer (`closed_by_user`) or, if omitted, the shift's cashier. **Required permission:** `cash_register.operate` ## OpenAPI ````yaml /api-reference/openapi.en.json post /cash-registers/{id}/close openapi: 3.0.3 info: title: FileXpress External API version: 1.0.0 description: >- API for integrating third-party systems with FileXpress: billing, HR, accounting, inventory, projects, accounts receivable and payable, treasury, pricing and promotions, and cash. Current base URL: /api/external/v1. The legacy unversioned path (/api/external) will be removed on January 1, 2027; migrate to /api/external/v1 (same endpoints, only the base URL changes). The v2 API (/api/external/v2) exposes currencies and exchange rates, sales and purchases in foreign currency, taxes by id, payrolls with branch, and errors with a stable `code`; its operations carry the /v2 prefix in the path. We suggest migrating to the available v2 routes before March 30, 2027. servers: - url: https://api.filexpress.app/api/external/v1 description: Production security: - ApiKey: [] tags: - name: General - name: Billing · Sales - name: Billing · Purchases - name: Billing · Customers - name: Billing · Suppliers - name: Billing · Products - name: Catalogs - name: HR · Employees - name: HR · Attendance - name: HR · Labor rules - name: HR · Schedules - name: HR · Holidays - name: HR · Attendance results - name: HR · Leave requests - name: HR · Payrolls - name: Accounting - name: Inventory - name: Projects - name: Accounts receivable - name: Accounts payable - name: Treasury - name: Pricing and promotions - name: Cash - name: Points of sale - name: API v2 · General - name: API v2 · Currencies and rates - name: API v2 · Countries - name: API v2 · Sales - name: API v2 · Purchases - name: API v2 · Payrolls paths: /cash-registers/{id}/close: post: tags: - Cash summary: Close cash register description: >- Closes the cash register with the declared cash and calculates the difference against the expected amount. Records the `user_id` sent as the closer (`closed_by_user`) or, if omitted, the shift's cashier. **Required permission:** `cash_register.operate` parameters: - name: id in: path required: true description: Cash register ID schema: type: string format: uuid example: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CashRegisterCloseRequest' example: declared_amount: 295 user_id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 notes: Sin novedades cash_count_breakdown: bills: hundred: 0 fifty: 0 twenty: 12 ten: 5 five: 0 one: 0 coins: quarter: 20 dime: 0 nickel: 0 penny: 0 total: 295 responses: '200': description: Cash register closed content: application/json: schema: type: object required: - status - data properties: status: type: boolean example: true data: $ref: '#/components/schemas/CashRegister' example: status: true data: id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 branch_id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 point_of_sale: id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 code: P001 name: Caja principal opened_by_user: id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 name: Ana Martínez closed_by_user: id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 name: Luis Pérez status: closed cashier: id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 name: Ana Martínez opening_date: '2026-10-06T08:00:00-06:00' closing_date: '2026-10-06T18:00:00-06:00' opening_amount: 100 declared_amount: 295 difference_amount: 0 total_sales: 410 total_cash_sales: 215 total_card_sales: 180 total_other_sales: 15 total_expenses: 20 total_other_incomes: 0 notes: null opened_by: 'API: Mi POS' closed_by: 'API: Mi POS' headers: Idempotent-Replayed: $ref: '#/components/headers/IdempotentReplayed' '401': $ref: '#/components/responses/E401' '403': $ref: '#/components/responses/E403' '404': description: Not found or belongs to another business content: application/json: schema: $ref: '#/components/schemas/Error' example: status: false message: Cash register not found '409': description: Cash register already closed or idempotency conflict content: application/json: schema: $ref: '#/components/schemas/Error' examples: closed: summary: Caja ya cerrada value: status: false message: Cash register is not open. idem_body: summary: Idempotency-Key reutilizada con otro cuerpo value: status: false message: >- This Idempotency-Key was already used with a different request. idem_busy: summary: Petición con la misma llave en proceso value: status: false message: >- A request with this Idempotency-Key is already being processed. '422': description: Validation, cash count that does not balance, or user without access content: application/json: schema: $ref: '#/components/schemas/Error' examples: breakdown: summary: Arqueo no cuadra value: status: false message: >- The cash count breakdown total does not match the declared amount. user: summary: Usuario sin acceso value: status: false message: The user does not exist or has no access to this branch. '429': $ref: '#/components/responses/E429' components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false description: >- Optional. Unique key per operation (max. 100 characters, valid for 24 h per integration). A retry with the same key and the same body returns the original response (header `Idempotent-Replayed: true`) without repeating the operation; with a different body, or while the first is still in progress, it returns 409. schema: type: string maxLength: 100 example: pago-2026-10-06-000123 schemas: CashRegisterCloseRequest: type: object properties: declared_amount: type: number minimum: 0 description: Counted cash. user_id: type: string format: uuid description: >- User closing the shift (with access to the branch). Default: the shift's cashier. notes: type: string maxLength: 500 cash_count_breakdown: type: object properties: bills: type: object properties: hundred: type: integer minimum: 0 fifty: type: integer minimum: 0 twenty: type: integer minimum: 0 ten: type: integer minimum: 0 five: type: integer minimum: 0 one: type: integer minimum: 0 description: Number of bills per denomination. coins: type: object properties: quarter: type: integer minimum: 0 dime: type: integer minimum: 0 nickel: type: integer minimum: 0 penny: type: integer minimum: 0 description: Number of coins per denomination. total: type: number description: Cash count total; must match declared_amount. required: - total required: - declared_amount CashRegister: type: object properties: id: type: string format: uuid branch_id: type: string format: uuid point_of_sale: type: object properties: id: type: string format: uuid code: type: string name: type: string required: - id - code nullable: true opened_by_user: type: object properties: id: type: string format: uuid name: type: string nullable: true required: - id nullable: true closed_by_user: type: object properties: id: type: string format: uuid name: type: string nullable: true required: - id nullable: true description: null while open. status: type: string description: Status. enum: - open - closed cashier: type: object properties: id: type: string format: uuid name: type: string nullable: true required: - id opening_date: type: string format: date-time closing_date: type: string format: date-time nullable: true opening_amount: type: number nullable: true declared_amount: type: number nullable: true difference_amount: type: number nullable: true description: Declared − expected. total_sales: type: number nullable: true total_cash_sales: type: number nullable: true total_card_sales: type: number nullable: true total_other_sales: type: number nullable: true total_expenses: type: number nullable: true total_other_incomes: type: number nullable: true notes: type: string nullable: true opened_by: type: string nullable: true description: 'Who opened it (from the API: "API: ").' closed_by: type: string nullable: true required: - id - status Error: type: object properties: status: type: boolean example: false message: type: string errors: type: object additionalProperties: type: array items: type: string description: Errors per field (validation only). required: - status - message headers: IdempotentReplayed: description: >- `true` when the response is the replay of a previous request with the same Idempotency-Key. schema: type: string enum: - 'true' responses: E401: description: Missing or invalid API Key content: application/json: example: status: false message: Invalid API Key. E403: description: Integration without the required permission or deactivated content: application/json: example: status: false message: This integration does not have the 'hr.employees' permission. required_scope: hr.employees E429: description: Rate limit exceeded content: application/json: example: status: false message: Rate limit exceeded. Please try again later. rate_limit: 100 securitySchemes: ApiKey: type: apiKey in: header name: X-API-Key description: Integration API Key (Integrations → New Integration). ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.