# Send an invoice by email API Reference Sends the invoice by email, attaching its PDF by default. When no recipient is given, the addresses configured on the customer are used. ## POST /v1/companies/{company_id}/invoices/{invoice_id}/send **Send an invoice by email** Sends the invoice by email, attaching its PDF by default. When no recipient is given, the addresses configured on the customer are used. ### Authentication Accepts any of: - `ApiKeyAuth` (HTTP bearer, token format `beel_sk_*`) ### Parameters - **company_id** (required) in path `string`: Unique identifier (UUID) of the company the operation acts on — its identifier, not its NIF. It is the only source of context: the account that owns it is derived from it, and the `BeeL-Active-Company` header plays no part. A company you do not reach answers `403`, and so does a company that does not exist, so the existence of a company in another account is never disclosed. - **invoice_id** (required) in path: Invoice ID - **Idempotency-Key** (optional) in header `string`: Idempotency key to prevent duplicates in sensitive operations. - Any unique client-generated string (e.g. an order id). A UUID also works but is not required - Allowed characters: letters, digits, `_` and `-` (max 255 chars) - Retrying with the same key replays the first response when it was a success (2xx) or a server error (5xx): same status and body, plus the header `Idempotency-Replay: true`. After a 5xx, check whether the operation took effect before retrying with a **new** key - A 4xx is not stored: the key is released, so the corrected request can reuse it - Stored responses expire 24 hours after processing The key is scoped per user and environment, and bound to the request body, so retrying after a network timeout replays the stored response instead of repeating the operation. | Status | Code | When | |---|---|---| | `400` | `INVALID_IDEMPOTENCY_KEY` | The key breaks the format rules above. | | `409` | `IDEMPOTENCY_KEY_PROCESSING` | The first request is still in flight. Wait for the `Retry-After` seconds (2) and retry with the same key. | | `409` | `IDEMPOTENCY_KEY_MISMATCH` | The key was already used with a **different** body. Use a new key. | ### Request Body **Content `application/json`:** - **recipients** `array[Email]`: Recipients of the email. When omitted, the invoice's `email_config` recipients apply, then the customer's `billing_emails`, then the customer's `email`. - **cc** `array[Email]`: CC recipients. Copied addresses count as recipients of the message: they are subject to the same sending restrictions and to the same quota as the addresses in `recipients`. When omitted, the CC addresses configured in the sender's email defaults apply; send an empty array to deliver the message without any copy. - **subject** `string`: Email subject (optional, if not specified uses a default) - **message** `string`: Custom message (optional, added before standard message) - **attach_pdf** `boolean`: No description - **attach_source_invoices** `boolean`: Attach a ZIP archive (`suplidos_.zip`) containing the PDFs of the source invoices referenced by the invoice's SUPLIDO consolidation lines (`source_invoice_ids`). Each PDF inside the ZIP is named `_.pdf`. Requires `attach_pdf: true` (the ZIP accompanies the invoice PDF). Access to sources owned by managed accounts is re-checked at send time with the same rules as issuing; the request fails with an actionable error — never a partial ZIP — if the invoice has no consolidation sources (`ATTACH_SOURCE_INVOICES_NO_SOURCES`), a source is not reachable (`ATTACH_SOURCE_INVOICE_UNAVAILABLE`), a source has no generated PDF (`ATTACH_SOURCE_PDF_MISSING`), or the ZIP exceeds the size limit (`ATTACH_SOURCE_ZIP_TOO_LARGE`). - **language**: Language of the email. When omitted, the issuing company's `email_language` applies, and Spanish (`es`) when the company has none set. **Example `send_invoice_email`** — Simple send (uses customer email if recipients not provided): ```json { "subject": "Invoice A/2025/0042 from Tu Empresa SL", "message": "Dear customer,\n\nPlease find attached invoice A/2025/0042 for services rendered.\nPlease make payment before the due date.\n\nKind regards,\nTu Empresa SL\n" } ``` **Example `send_invoice_email_multiple`** — Multiple recipients with CC: ```json { "recipients": [ "cliente@ejemplo.com", "contabilidad@ejemplo.com", "administracion@ejemplo.com" ], "cc": [ "archivo@tuempresa.com" ], "subject": "Invoice A/2025/0042 - January services", "message": "Invoice for services rendered during January 2025." } ``` ### Responses #### 200: Email sent successfully **Content `application/json`:** - **success** (required) `boolean`: No description (example: true) - **data** (required): The payload. An object for a single resource; an object holding the named collection (and its `pagination`) for a listing. Never a bare array at this level in v1. - **meta** `ResponseMeta` - **data** `object`: No description - **email_id** `UUID`: Universally Unique Identifier (UUID v4) - **sent_to** `array[Email]`: No description - **sent_at** `string` (date-time): No description #### 202: Accepted, not sent yet: `attach_pdf` is `true` and the invoice's PDF is not generated yet. This can happen right after issuing, whether or not the invoice goes through VeriFactu — the PDF is generated asynchronously — or, for a VeriFactu invoice specifically, while it waits for the QR of its registration. The email goes out shortly after the PDF is stored, with it attached (it can take several minutes if VeriFactu or PDF generation is delayed). Follow it with `email_id`. If the invoice ends up with no PDF (a VeriFactu registration that ends without a QR, or PDF generation that fails for good), or its PDF is not stored within a day, the email is marked as failed, with its reason. `sent_at` here is when the request was ACCEPTED, not when the email actually went out — it has not, yet. The `invoice.email.sent` webhook tells you when it goes out; a failed email has no webhook, so check its status by `email_id`. **Content `application/json`:** - **success** (required) `boolean`: No description (example: true) - **data** (required): The payload. An object for a single resource; an object holding the named collection (and its `pagination`) for a listing. Never a bare array at this level in v1. - **meta** `ResponseMeta` - **data** `object`: No description - **email_id** `UUID`: Universally Unique Identifier (UUID v4) - **sent_to** `array[Email]`: No description - **sent_at** `string` (date-time): The moment this request was accepted, not the moment the email was sent — it has not been sent yet. See the `202` description. #### 400: The invoice cannot be sent: `INVOICE_DRAFT_NOT_SENDABLE` when it is not issued yet, a draft or a scheduled invoice (issue it first), `INVOICE_NOT_REGISTERED_NO_PDF` when `attach_pdf` is `true` and the invoice has no VeriFactu registration, so it has no PDF (the reason is in `verifactu.error_message`). **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") #### 401: Missing or invalid authentication. Like every other error, `message`/`detail` is localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English when the header is missing or asks for none of those. **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") **Example:** ```json { "success": false, "error": { "code": "UNAUTHORIZED", "message": "Authentication is required to access this resource" }, "meta": { "timestamp": "2025-01-15T10:30:00Z", "request_id": "4bf92f3577b34da6a3ce929d0e0e4736" } } ``` #### 403: The company does not belong to the authenticated account, or the message is not allowed to reach one of its recipients (`ENVIO_NO_PERMITIDO`). Test environments only deliver to the account holder's own address; every address in `recipients` and in `cc` is checked. **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") #### 404: The resource addressed by the path does not exist, or is not one this credential can see — the two are answered identically, so existence is never disclosed. `error.code` names the kind of resource that was missing, so a client can tell which of several ids in a path failed to resolve: - `INVOICE_NOT_FOUND` — the `{invoice_id}` (invoices, proformas and their sub-resources). - `RECURRING_NOT_FOUND` — the `{recurring_invoice_id}`. - `CLIENT_NOT_FOUND` — the `{customer_id}`. - `INVOICE_CLIENT_NOT_FOUND` — the `customer_id` referenced by an invoice body does not resolve to a customer of the issuing company. - `PRODUCT_NOT_FOUND` — the `{product_id}`. - `SERIES_NOT_FOUND` — the `{series_id}`. - `WEBHOOK_SUBSCRIPTION_NOT_FOUND`, `DELIVERY_LOG_NOT_FOUND` — the `{webhook_id}` and the `{delivery_id}`. - `NOT_FOUND` — the generic fallback, for the few resources that carry no code of their own. Some resources declare a more specific `404` response of their own (`CONNECTION_NOT_FOUND`, `MEMBER_NOT_FOUND`, `GRANT_NOT_FOUND`, `INVITATION_NOT_FOUND`, `REQUEST_LOG_NOT_FOUND`); it is documented on the operation. A `404` with `ENDPOINT_NOT_FOUND` is a different answer: the **path itself** does not exist in this API (a typo in the route, or a resource that was never here). It says nothing about any resource. When the path exists but not with that method, the answer is `405`, not `404`. **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") **Example:** ```json { "success": false, "error": { "code": "INVOICE_NOT_FOUND", "message": "Invoice not found" }, "meta": { "timestamp": "2025-01-15T10:30:00Z", "request_id": "4bf92f3577b34da6a3ce929d0e0e4736" } } ``` #### 422: `INVOICE_EMAIL_NO_RECIPIENTS`: the request sends no recipients and the recipient of the invoice has no email address. **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") #### 429: Rate limit exceeded **Headers:** - `Retry-After` `integer`: Seconds until the rate limit resets - `RateLimit-Limit` `integer`: Maximum requests allowed in the window - `RateLimit-Remaining` `integer`: Remaining requests in the current window - `RateLimit-Reset` `integer`: Seconds until the current window resets **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") **Example:** ```json { "success": false, "error": { "code": "RATE_LIMIT_EXCEEDED", "message": "Too many requests. Please try again in 60 seconds." }, "meta": { "timestamp": "2025-01-15T10:30:00Z", "request_id": "4bf92f3577b34da6a3ce929d0e0e4736" } } ``` #### 500: Internal server error **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") **Example:** ```json { "success": false, "error": { "code": "INTERNAL_ERROR", "message": "Internal server error" }, "meta": { "timestamp": "2025-01-15T10:30:00Z", "request_id": "4bf92f3577b34da6a3ce929d0e0e4736" } } ``` #### default: Any status code the operation does not list above. Every operation declares it, so a generated client always has a branch to fall into and never loses the cause of a failure it did not anticipate. This is where the transport-level answers land — `405`, `406`, `415` and `429` — together with any status a future version of the API starts returning. All of them carry the same error envelope as the codes listed explicitly, so `error.code` is what tells them apart: switching on the status code alone is not enough. See «Transport-level errors» in the API description for when each one is produced. A `502` carrying `EXTERNAL_SERVICE_ERROR` also lands here: an outbound integration the operation depends on failed or did not answer in time. It is a transient condition — retry with the same `Idempotency-Key` where the operation accepts one. One exception to the envelope: a failure of the network edge that never reaches the application (`502`, `503`, `504`, `524`) is generated by Cloudflare and its body is not BeeL's — it may not even be JSON. Treat those as "no answer", and retry. **Content `application/json`:** - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") **Example:** ```json { "success": false, "error": { "code": "UNSUPPORTED_MEDIA_TYPE", "message": "Unsupported media type: text/plain. Supported: application/json" }, "meta": { "timestamp": "2025-01-15T10:30:00Z", "request_id": "4bf92f3577b34da6a3ce929d0e0e4736" } } ``` --- # Related Schema Definitions ## SendEmailRequest - **recipients** `array[Email]`: Recipients of the email. When omitted, the invoice's `email_config` recipients apply, then the customer's `billing_emails`, then the customer's `email`. - **cc** `array[Email]`: CC recipients. Copied addresses count as recipients of the message: they are subject to the same sending restrictions and to the same quota as the addresses in `recipients`. When omitted, the CC addresses configured in the sender's email defaults apply; send an empty array to deliver the message without any copy. - **subject** `string`: Email subject (optional, if not specified uses a default) - **message** `string`: Custom message (optional, added before standard message) - **attach_pdf** `boolean`: No description - **attach_source_invoices** `boolean`: Attach a ZIP archive (`suplidos_.zip`) containing the PDFs of the source invoices referenced by the invoice's SUPLIDO consolidation lines (`source_invoice_ids`). Each PDF inside the ZIP is named `_.pdf`. Requires `attach_pdf: true` (the ZIP accompanies the invoice PDF). Access to sources owned by managed accounts is re-checked at send time with the same rules as issuing; the request fails with an actionable error — never a partial ZIP — if the invoice has no consolidation sources (`ATTACH_SOURCE_INVOICES_NO_SOURCES`), a source is not reachable (`ATTACH_SOURCE_INVOICE_UNAVAILABLE`), a source has no generated PDF (`ATTACH_SOURCE_PDF_MISSING`), or the ZIP exceeds the size limit (`ATTACH_SOURCE_ZIP_TOO_LARGE`). - **language**: Language of the email. When omitted, the issuing company's `email_language` applies, and Spanish (`es`) when the company has none set. ## Email Email address (minimum valid email is 5 chars, e.g. a@b.co) Type: `string` (email) ## SuccessResponse The envelope every successful JSON response of the BeeL. API is wrapped in. There are no bare resources in v1 and none are planned: the payload always hangs off `data`. - A **single resource** is an object in `data`. - A **collection** hangs off a named key inside `data`, together with its `pagination`, also inside `data` — `data: {invoices: [...], pagination: {...}}`. - A collection carries `pagination` unless its operation declares itself a **closed catalogue**: a fixed, bounded list with nothing to page through. The declaration is explicit in the operation; a missing `pagination` is never something to infer. - `GET /v1/accounts` pages by cursor (`data: {accounts: [...], next_cursor}`). It is a documented variant of pagination, not another envelope. Putting the array straight into `data` with `pagination` as its sibling is the shape a v2 would adopt; v1 is not being flipped to it. - **success** (required) `boolean`: No description (example: true) - **data** (required): The payload. An object for a single resource; an object holding the named collection (and its `pagination`) for a listing. Never a bare array at this level in v1. - **meta** `ResponseMeta` ## ResponseMeta - **timestamp** `string` (date-time): No description (example: "2025-01-15T10:30:00Z") - **request_id** `string`: No description (example: "4bf92f3577b34da6a3ce929d0e0e4736") ## UUID Universally Unique Identifier (UUID v4) Type: `string` (uuid) ## ErrorResponse Error response shared by all BeeL. APIs. The payload carries **two contracts at once** (additive, non-breaking): - **Legacy** (`success`, `error.{code,message,details}`, `meta`) — kept intact for existing consumers. - **RFC 9457** (`type`, `title`, `detail`, `instance`) — new fields for integrators following Problem Details for HTTP APIs. The `type` URI is the stable, shareable link to the error's documentation page (e.g. `https://docs.beel.es/errors/{code}`). Future migration: the legacy fields will be deprecated via `Deprecation`/`Sunset` headers after a sufficient adoption window, and the response Content-Type will move to `application/problem+json`. - **success** (required) `boolean`: No description (example: false) - **error** (required) `ErrorDetail` - **meta** `ResponseMeta` - **type** `string` (uri): Stable URI that identifies the problem type and where the integrator will find its documentation. (example: "https://docs.beel.es/errors/INVOICE_NO_LINES") - **title** `string`: Short summary of the problem type. Stable between occurrences of the same `type`. (example: "INVOICE_NO_LINES") - **detail** `string`: Specific message for this occurrence, localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English. Matches the legacy `error.message`. (example: "The invoice must have at least one line") - **instance** `string` (uri-reference): URI that identifies the specific occurrence of the problem — typically the path of the affected resource. (example: "/v1/invoices/abc-123") ## ErrorDetail - **code** (required) `string`: No description (example: "VALIDATION_ERROR") - **message** (required) `string`: No description (example: "The provided data is not valid") - **details** `object`: No description (example: {"field":"specific error message"}) --- Full OpenAPI spec: https://docs.beel.es/api/openapi