> ## Documentation Index > Fetch the complete documentation index at: https://docs.fluidehr.com/llms.txt > Use this file to discover all available pages before exploring further. # Resend invoice email to customer (rotates pay link) ## OpenAPI ````yaml /openapi/fluide-books.json post /api/v1/invoices/{id}/resend openapi: 3.0.0 info: title: Fluide Books API description: >- Accounting: chart of accounts, journal entries, invoices, bills, banking, budgets, and payroll GL integration. In the API playground, click Authorize and provide Bearer JWT, X-Fluide-Api-Key, and X-Fluide-Client-Id (fluide-developer). For partner / ISV integrations acting on a merchant, also set optional X-Workspace-Id and X-Acting-Company-Id on each request (see Multi-tenancy). version: '1.0' contact: {} servers: - url: https://test.api.fluidehr.com description: API security: - bearer: [] fluideApiKey: [] fluideClientId: [] tags: - name: App description: Service root and build metadata. Use for quick connectivity checks. x-group: Operations - name: Audit - name: Prometheus description: >- Prometheus scrape endpoint in text exposition format. Configure your metrics collector to poll this path on each service. x-group: Operations - name: Chart of Accounts - name: Journal Entries - name: Invoices - name: Public Invoices - name: Invoice collection settings - name: Exchange rates - name: Payroll GL mappings - name: Ledger - name: Reconciliation - name: Bills - name: Banking - name: Budgets - name: Fixed assets - name: Dashboard - name: Reports - name: StatementExports - name: ScheduledReports - name: Projects - name: AccountingClients - name: Company accounting settings - name: Business Partners - name: Recurring - name: Transactions - name: Inter company - name: Treasury - name: Internal Payments - name: Authorize description: >- Exchange API key and secret for a machine JWT, read developer metadata, rotate secrets, and manage API billing. paths: /api/v1/invoices/{id}/resend: post: tags: - Invoices summary: Resend invoice email to customer (rotates pay link) operationId: InvoicesController_resend parameters: - name: id required: true in: path schema: type: string - name: authorization required: true in: header schema: type: string - name: X-Workspace-Id in: header required: false description: >- Partner / ISV only: UUID of the workspace that owns the client company. Required together with X-Acting-Company-Id when scoping product APIs to a merchant. See /getting-started/multi-tenancy. schema: type: string format: uuid example: b03fa178-67bd-4378-a5aa-d169c01ccb6f - name: X-Acting-Company-Id in: header required: false description: >- Partner / ISV only: UUID of the client company to act on. Must belong to the workspace in X-Workspace-Id. schema: type: string format: uuid example: ab2df10a-c66c-4bef-b7d6-efda26cca494 responses: '200': description: Resend invoice email to customer (rotates pay link) content: application/json: schema: allOf: - $ref: '#/components/schemas/ApiResponseDto' - properties: data: description: Endpoint-specific payload '201': description: '' content: application/json: schema: $ref: '#/components/schemas/Invoice' '400': description: Validation failed or invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponseDto' '401': description: Missing or invalid JWT / API key content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponseDto' '403': description: Token valid but insufficient permission for this operation content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponseDto' '404': description: Resource not found or outside caller scope content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponseDto' security: - bearer: [] fluideApiKey: [] fluideClientId: [] x-codeSamples: - lang: bash label: cURL source: |- curl -sS -X POST "$FLUIDE_BASE_URL/api/v1/invoices/string/resend" \ -H "Authorization: Bearer $FLUIDE_ACCESS_TOKEN" \ -H "X-Fluide-Api-Key: $FLUIDE_API_KEY" \ -H "X-Fluide-Client-Id: fluide-developer" \ -H "authorization: your_authorization" \ -H "X-Workspace-Id: $FLUIDE_WORKSPACE_ID" \ -H "X-Acting-Company-Id: $FLUIDE_COMPANY_ID" - lang: node label: Node.js source: >- const baseUrl = process.env.FLUIDE_BASE_URL; const response = await fetch(`${baseUrl}/api/v1/invoices/string/resend`, { method: 'POST', headers: { Authorization: `Bearer ${process.env.FLUIDE_ACCESS_TOKEN}`, 'X-Fluide-Api-Key': process.env.FLUIDE_API_KEY, 'X-Fluide-Client-Id': 'fluide-developer', 'authorization': 'your_authorization', 'X-Workspace-Id': process.env.FLUIDE_WORKSPACE_ID, 'X-Acting-Company-Id': process.env.FLUIDE_COMPANY_ID, }, }); if (!response.ok) throw new Error(`HTTP ${response.status}: ${await response.text()}`); console.log(await response.json()); - lang: python label: Python source: |- import os import requests base_url = os.environ["FLUIDE_BASE_URL"] headers = { "Authorization": f"Bearer {os.environ['FLUIDE_ACCESS_TOKEN']}", "X-Fluide-Api-Key": os.environ["FLUIDE_API_KEY"], "X-Fluide-Client-Id": "fluide-developer", "authorization": "your_authorization", "X-Workspace-Id": os.environ["FLUIDE_WORKSPACE_ID"], "X-Acting-Company-Id": os.environ["FLUIDE_COMPANY_ID"], } response = requests.post( f"{base_url}/api/v1/invoices/string/resend", headers=headers, timeout=30, ) response.raise_for_status() print(response.json()) - lang: java label: Java source: >- import java.net.URI; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; String baseUrl = System.getenv("FLUIDE_BASE_URL"); HttpClient client = HttpClient.newHttpClient(); HttpRequest.Builder builder = HttpRequest.newBuilder() .uri(URI.create(baseUrl + "/api/v1/invoices/string/resend")) .header("Authorization", "Bearer " + System.getenv("FLUIDE_ACCESS_TOKEN")) .header("X-Fluide-Api-Key", System.getenv("FLUIDE_API_KEY")) .header("X-Fluide-Client-Id", "fluide-developer") .header("authorization", "your_authorization") .header("X-Workspace-Id", System.getenv("FLUIDE_WORKSPACE_ID")) .header("X-Acting-Company-Id", System.getenv("FLUIDE_COMPANY_ID")) .POST(HttpRequest.BodyPublishers.noBody()) .build(); HttpResponse response = client.send(builder.build(), HttpResponse.BodyHandlers.ofString()); if (response.statusCode() >= 400) throw new RuntimeException("HTTP " + response.statusCode() + ": " + response.body()); System.out.println(response.body()); - lang: php label: PHP source: >- true, CURLOPT_CUSTOMREQUEST => 'POST', CURLOPT_HTTPHEADER => [ 'Authorization: Bearer ' . getenv('FLUIDE_ACCESS_TOKEN'), 'X-Fluide-Api-Key: ' . getenv('FLUIDE_API_KEY'), 'X-Fluide-Client-Id: fluide-developer', 'authorization: your_authorization', 'X-Workspace-Id: ' . getenv('FLUIDE_WORKSPACE_ID'), 'X-Acting-Company-Id: ' . getenv('FLUIDE_COMPANY_ID'), ], ]); $response = curl_exec($ch); if ($response === false) throw new RuntimeException(curl_error($ch)); $status = curl_getinfo($ch, CURLINFO_HTTP_CODE); if ($status >= 400) throw new RuntimeException("HTTP $status: $response"); echo $response; components: schemas: ApiResponseDto: type: object properties: success: type: boolean example: true description: Whether the request succeeded message: type: string example: Operation completed successfully description: Human-readable outcome message (localized when i18n is configured) data: type: object description: Response payload when success is true required: - success - message Invoice: type: object properties: organizationId: type: string companyId: type: string nullable: true description: >- Subsidiary / company for multi-entity AR. Null only for legacy rows before this column existed. invoiceNumber: type: string kind: enum: - STANDARD - PROFORMA - CREDIT_NOTE - DEBIT_NOTE - DOWN_PAYMENT type: string customerId: type: string projectId: type: string nullable: true description: Project accounting dimension (optional). clientId: type: string nullable: true description: Client / sub-ledger dimension (optional). issueDate: format: date-time type: string dueDate: format: date-time type: string subtotal: type: number taxAmount: type: number total: type: number currency: type: string status: enum: - DRAFT - POSTED - SENT - VIEWED - PARTIALLY_PAID - PAID - OVERDUE - CANCELLED type: string settlementStatus: enum: - UNPAID - PARTIALLY_PAID - PAID type: string amountPaid: type: number balanceDue: type: number postedAt: format: date-time type: string nullable: true description: >- When set, the invoice has been posted to the ledger and must not be edited directly. postedBy: type: string nullable: true postedJournalEntryId: type: string nullable: true notes: type: string sourceDocumentIds: type: array items: type: string sentByEmail: type: string nullable: true description: >- Email of the user who last sent the invoice (issuer notification fallback). lineItems: type: array items: $ref: '#/components/schemas/InvoiceLineItem' allocations: type: array items: $ref: '#/components/schemas/InvoicePaymentAllocation' creditNotes: type: array items: $ref: '#/components/schemas/CreditNote' id: type: string createdAt: format: date-time type: string updatedAt: format: date-time type: string deletedAt: format: date-time type: string required: - organizationId - companyId - invoiceNumber - kind - customerId - projectId - clientId - issueDate - dueDate - subtotal - taxAmount - total - currency - status - settlementStatus - amountPaid - balanceDue - postedAt - postedBy - postedJournalEntryId - notes - sourceDocumentIds - sentByEmail - lineItems - allocations - creditNotes - id - createdAt - updatedAt ApiErrorResponseDto: type: object properties: success: type: boolean example: false message: type: string example: Validation failed description: Human-readable error message (localized when i18n is configured) code: type: string example: VALIDATION_FAILED description: Stable machine-readable error code for client handling and support errors: type: object description: Field-level validation errors keyed by property name example: from: - from must be a valid date statusCode: type: number example: 400 timestamp: type: string example: '2026-06-03T12:00:00.000Z' required: - success - message - code - statusCode - timestamp InvoiceLineItem: type: object properties: invoiceId: type: string invoice: $ref: '#/components/schemas/Invoice' lineNumber: type: number description: type: string quantity: type: number unitPrice: type: number discountAmount: type: number taxAmount: type: number lineTotal: type: number glAccountId: type: string nullable: true description: The resolved GL account for this line item at posting time. taxCodeId: type: string nullable: true description: >- Optional tax code reference (jurisdiction/rate is handled by the tax engine later). id: type: string createdAt: format: date-time type: string updatedAt: format: date-time type: string deletedAt: format: date-time type: string required: - invoiceId - invoice - lineNumber - description - quantity - unitPrice - discountAmount - taxAmount - lineTotal - glAccountId - taxCodeId - id - createdAt - updatedAt InvoicePaymentAllocation: type: object properties: invoiceId: type: string invoice: $ref: '#/components/schemas/Invoice' fluidePayTransactionId: type: string nullable: true description: References the payment transaction in FluidePay. paymentSource: type: string enum: - FLUIDEPAY - MANUAL - BANK_TRANSFER - CASH - CHEQUE externalReference: type: string nullable: true evidenceDocumentIds: type: array items: type: string allocatedAmount: type: number currency: type: string allocatedAt: format: date-time type: string allocatedBy: type: string nullable: true memo: type: string nullable: true id: type: string createdAt: format: date-time type: string updatedAt: format: date-time type: string deletedAt: format: date-time type: string required: - invoiceId - invoice - fluidePayTransactionId - paymentSource - externalReference - evidenceDocumentIds - allocatedAmount - currency - allocatedAt - allocatedBy - memo - id - createdAt - updatedAt CreditNote: type: object properties: organizationId: type: string companyId: type: string nullable: true creditNoteNumber: type: string invoiceId: type: string invoice: $ref: '#/components/schemas/Invoice' amount: type: number currency: type: string reason: type: string nullable: true status: type: string enum: - DRAFT - POSTED - VOID postedAt: format: date-time type: string nullable: true postedBy: type: string nullable: true postedJournalEntryId: type: string nullable: true id: type: string createdAt: format: date-time type: string updatedAt: format: date-time type: string deletedAt: format: date-time type: string required: - organizationId - companyId - creditNoteNumber - invoiceId - invoice - amount - currency - reason - status - postedAt - postedBy - postedJournalEntryId - id - createdAt - updatedAt securitySchemes: bearer: type: http scheme: bearer bearerFormat: JWT description: >- Access token JWT. Use as Authorization: Bearer . In the API playground, paste the JWT only. fluideApiKey: type: apiKey in: header name: X-Fluide-Api-Key description: >- Developer API key (fl_dev_...). Required on every API call with a machine access token. x-default: fl_dev_your_key fluideClientId: type: apiKey in: header name: X-Fluide-Client-Id description: >- First-party client audience. Must match the fluide_client_id claim on the JWT. Use fluide-developer for Connect. x-default: fluide-developer ````