> ## Documentation Index
> Fetch the complete documentation index at: https://docs.e-invoice.be/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> See which API behaviour and documentation changed, and which endpoints and parameters are deprecated.

This page lists changes that have an effect on an existing integration. The API has one version and no version number in its paths. The current version of the OpenAPI specification is `1.1.0`.

<Note>
  The date of each entry is the date on which the change was published in this documentation.
</Note>

<Update label="2026-10-01" description="Send-only tenants">
  The Admin API documentation now describes send-only tenants. A tenant can send documents on Peppol without a registration on the SMP. Tenant creation and tenant update do not register the tenant on the Peppol network. Registration is a separate step that is necessary only when the tenant must receive documents.

  See [Admin API](/admin-api#send-only-tenants).
</Update>

<Update label="2026-07-20" description="Mailbox endpoints">
  The OpenAPI specification now contains the Mailbox (inbound email) endpoints:

  * `GET /api/mailbox/`
  * `GET /api/mailbox/{inbound_email_id}`
  * `GET /api/mailbox/{inbound_email_id}/attachments/{filename}`
  * `POST /api/mailbox/{inbound_email_id}/reprocess`

  See [Send invoices by email (Mailbox)](/guides/mailbox).
</Update>

<Update label="2026-07-13" description="Single API host and sandbox companies">
  The documentation now describes one API host, `https://api.e-invoice.be`. References to a second host for development were removed.

  Tests are done with a sandbox company. A sandbox company is in test mode: outbound documents go to email, and inbound documents are added with Simulate inbound. Test mode is fixed when the company is created. A sandbox company cannot be converted into a production company.

  See [Test mode and sandbox companies](/environments) and [Go-live checklist](/going-live).
</Update>

## Deprecated items

These items are marked as deprecated in the API. They continue to operate, but do not use them in new integrations.

| Item | Type |
| - | - |
| `GET /api/outbox/drafts` | Endpoint |
| `POST /api/documents/{document_id}/attachments` | Endpoint |
| `email` on `POST /api/documents/{document_id}/send` | Query parameter |
| `sender` on `GET /api/outbox/` | Query parameter |

## Next Steps

<CardGroup cols={2}>
  <Card title="API reference" icon="code" href="/api-reference">
    Read the reference for all endpoints
  </Card>

  <Card title="Test mode and sandbox companies" icon="flask" href="/environments">
    Learn about the API host and sandbox companies
  </Card>

  <Card title="Go-live checklist" icon="list-check" href="/going-live">
    Move from a sandbox company to a production company
  </Card>
</CardGroup>