> ## Documentation Index > Fetch the complete documentation index at: https://docs.lastaccountingcompany.com/llms.txt > Use this file to discover all available pages before exploring further. # Retry sending an invoice > Retries delivery of an invoice whose previous send attempt failed. Requires a write-scoped key. ## OpenAPI ````yaml /openapi.yaml post /invoices/{invoice_id}/retry-send openapi: 3.1.0 info: title: LAC Customer API version: '2026-07-02' description: > The Last Accounting Company (LAC) is an AI-native accounting firm for Finnish SMBs: continuous reconciliation, daily close, real-time dashboards, and full Vero reporting. This API is the same surface the LAC customer portal UI uses. It gives you programmatic access to your books (read-only general-ledger views), financial statements, documents, invoicing, payroll, source-system connections, and the message channel to Björn, the accounting agent. ## Authentication Every request carries `Authorization: Bearer `. Two token kinds are accepted: - **Portal API key** (`lac_sk_...`) — minted in portal Settings → API access. Keys have a scope of `read` or `write`. Read-scoped keys are refused on all mutating methods (POST/PATCH/DELETE). Write-scoped keys act as the `operator` role: they can never use payroll endpoints (reads included), change company settings, grant access, or manage API keys — those operations require an interactive admin/approver session. - **Firebase ID token** — the interactive session token used by the portal UI itself. API keys are pinned to a single company, so the `customer_id` parameter (query string on GETs, body field on writes) can always be omitted when authenticating with an API key. Interactive tokens with access to multiple companies use `customer_id` to select one. ## Conventions - All field names are `snake_case` on the wire. - Monetary amounts are **integer cents** (fields suffixed `_cents`). - Rates and percentages are **basis points** (fields suffixed `_basis_points`; 10000 = 100%, e.g. Finnish standard VAT 25.5% = 2550). - Quantities on invoice lines are decimal strings (e.g. `"1"`, `"2.5"`). - Dates are `YYYY-MM-DD`; periods are `YYYY-MM`; ranges accept `YYYY-MM`, `YYYY-Qn`, `YYYY`, `all`, `this_month`, or `last_6_months`. ## Limits - Document uploads: at most 20 files and 25 MB per request. - Sheet pagination: `limit` is capped at 200 rows per page (0 = unpaginated). ## Errors Errors return a JSON envelope `{"error": "...", "detail": "..."}` with a conventional HTTP status code (401 missing/invalid token, 403 insufficient scope or role, 404 not found, 422 validation failure). More at [docs.lastaccountingcompany.com](https://docs.lastaccountingcompany.com). contact: name: The Last Accounting Company url: https://docs.lastaccountingcompany.com servers: - url: https://api.app.lastaccountingcompany.com/portal description: Production (note the /portal base path). security: - apiKey: [] tags: - name: Company description: Company profile, identity, overview, and agent status. - name: Books description: >- Read-only windows into the canonical general ledger: the spreadsheet-style Books/VAT sheet, financial statements, and analytics. There is no cell-edit or batch-edit API — the books are maintained by LAC. - name: Documents description: Receipt/invoice/contract uploads and per-file ingest metadata. - name: Messages description: The chat channel to Björn, the accounting agent. - name: Filings description: Filing authorization, review requests, and produced output packages. - name: Invoicing description: >- Sales invoicing — drafts, sending (Maventa e-invoice / email PDF / PDF download), credit notes, reminders, recurring templates, and the invoice-customer register. - name: Payroll description: >- Payroll workspace — employees, tax cards, employer settings, draft runs, and payslips. Every payroll operation (reads included) requires an interactive admin/approver session and is NOT available to API keys. - name: Connections description: >- Source-system connections (bank, Stripe, Procountor, Fennoa, inbox/Gmail, Google Sheets) and service-connection requests/confirmations. Note: the browser-interactive OAuth start/complete flows (Yapily bank consent, Google OAuth) are portal-only and intentionally not part of this API — use the portal UI to establish a connection, then read and sync it here. - name: Imports description: Historical import runs (e.g. migrated books) and their artifacts. - name: API keys description: >- Manage portal API keys. These endpoints require an interactive admin session (Firebase token) and are NOT available to API-key bearers, which receive 403. paths: /invoices/{invoice_id}/retry-send: post: tags: - Invoicing summary: Retry sending an invoice description: >- Retries delivery of an invoice whose previous send attempt failed. Requires a write-scoped key. operationId: retrySendInvoice parameters: - $ref: '#/components/parameters/InvoiceIdPath' requestBody: required: false content: application/json: schema: $ref: '#/components/schemas/CustomerIdBody' responses: '200': description: Updated invoice. content: application/json: schema: $ref: '#/components/schemas/PortalInvoice' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' components: parameters: InvoiceIdPath: name: invoice_id in: path required: true schema: type: string schemas: CustomerIdBody: type: object description: Optional company selector for write requests. properties: customer_id: type: string description: Target company. Optional for API keys. PortalInvoice: type: object description: >- One sales invoice or draft. Amounts are integer cents; interior fields beyond the stable ones vary by status. properties: id: type: string status: type: string delivery_channel: type: string customer: $ref: '#/components/schemas/Party' lines: type: array items: $ref: '#/components/schemas/InvoiceLine' additionalProperties: true Party: type: object description: >- An invoicing counterparty (the customer you invoice), with e-invoice routing and per-party defaults. Rates in basis points (25.5% = 2550). required: - name properties: id: type: string description: Party id. Include on upsert to update an existing party. name: type: string business_id: type: string description: Finnish business ID (Y-tunnus), e.g. `1234567-8`. vat_number: type: string description: EU VAT number, e.g. `FI12345678`. address_line1: type: string postal_code: type: string city: type: string country_code: type: string description: ISO 3166-1 alpha-2, e.g. `FI`. email: type: string einvoice_address: type: string description: E-invoice (verkkolasku) address, e.g. an OVT identifier. einvoice_operator: type: string description: E-invoice operator/intermediator code. default_payment_terms_days: type: integer default_vat_code: type: string default_vat_rate_basis_points: type: integer description: Default VAT rate in basis points (25.5% = 2550). default_invoice_language: type: string InvoiceLine: type: object description: >- One invoice line. Money in integer cents; VAT rate in basis points; quantity is a decimal string. required: - description - quantity - unit_price_cents - net_cents - vat_cents - gross_cents properties: description: type: string quantity: type: string description: Decimal quantity as a string, e.g. `"2.5"`. unit_price_cents: type: integer description: Unit price in integer cents. vat_rate_basis_points: type: - integer - 'null' description: VAT rate in basis points (25.5% = 2550); null when not applicable. vat_code: type: string description: VAT treatment code. net_cents: type: integer description: Line net amount in integer cents. vat_cents: type: integer description: Line VAT amount in integer cents. gross_cents: type: integer description: Line gross amount in integer cents. Error: type: object description: Standard error envelope. properties: error: type: string description: Machine-readable error message. detail: type: string description: Human-readable detail. responses: Unauthorized: description: Missing or invalid bearer token. content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: >- Insufficient scope or role — e.g. a read-scoped key on a mutating method, or an API key on an admin/approver-only endpoint. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: apiKey: type: http scheme: bearer bearerFormat: lac_sk_... description: >- Portal API key minted in portal Settings → API access. Scope `read` or `write`; pinned to one company. Send as `Authorization: Bearer lac_sk_...`. ````