> ## 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. # Save budget lines > Upsert by center, account, and month. With `replace: false` (default) an `amount: 0` clears the cell; with `replace: true` it replaces all lines. Only in `draft`. **Required permission:** `accounting.budgets.write` ## OpenAPI ````yaml /api-reference/openapi.en.json put /accounting/budgets/{id}/lines 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: /accounting/budgets/{id}/lines: put: tags: - Accounting summary: Save budget lines description: >- Upsert by center, account, and month. With `replace: false` (default) an `amount: 0` clears the cell; with `replace: true` it replaces all lines. Only in `draft`. **Required permission:** `accounting.budgets.write` parameters: - name: id in: path required: true description: Budget ID schema: type: string format: uuid example: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/BudgetLinesRequest' example: replace: false lines: - cost_center_id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 account_id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 month: 3 amount: 150 responses: '200': description: Success content: application/json: schema: type: object required: - status - data properties: status: type: boolean example: true data: $ref: '#/components/schemas/Budget' example: status: true data: id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 business_id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 name: Presupuesto 2026 fiscal_year: 2026 status: draft notes: null lines_count: 1 total_amount: 100 created_at: '2026-10-08T15:00:00.000000Z' updated_at: '2026-10-08T15:00:00.000000Z' lines: - id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 cost_center_id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 account_id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 month: 1 amount: 100 cost_center: id: 9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11 code: '0101' name: Ventas San Salvador account: id: 3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01 code: '6102' name: Papelería '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: Budget not found '422': description: Validation or budget not editable content: application/json: schema: $ref: '#/components/schemas/Error' example: status: false message: Validation errors errors: status: - Solo se puede modificar un presupuesto en borrador. '429': $ref: '#/components/responses/E429' components: schemas: BudgetLinesRequest: type: object properties: lines: type: array items: type: object properties: cost_center_id: type: string format: uuid description: Leaf and active center. account_id: type: string format: uuid description: Account with an optional or required center policy. month: type: integer minimum: 1 maximum: 12 amount: type: number minimum: 0 required: - cost_center_id - account_id - month - amount replace: type: boolean default: false description: true = replaces all lines. required: - lines Budget: type: object properties: id: type: string format: uuid business_id: type: string format: uuid name: type: string fiscal_year: type: integer status: type: string description: Status. enum: - draft - approved - closed notes: type: string nullable: true lines_count: type: integer total_amount: type: number created_at: type: string format: date-time updated_at: type: string format: date-time lines: type: array items: type: object properties: id: type: string format: uuid cost_center_id: type: string format: uuid account_id: type: string format: uuid month: type: integer amount: type: number cost_center: type: object properties: id: type: string format: uuid code: type: string name: type: string required: - id nullable: true account: type: object properties: id: type: string format: uuid code: type: string name: type: string required: - id nullable: true required: - cost_center_id - account_id - month - amount required: - id - name - fiscal_year - 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 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.