Oman's e-invoicing dates are now set in law: 1 April and 1 October 2027. Read our guide. Read the guide

Integrations

Connect the systems you already run — no rip and replace

Your ERP or accounting system stays the source of your invoices. Invoice And Tax connects to it through the REST API, a connector framework with file and SFTP transports, or Excel and CSV import, then validates, issues and tracks every document.

  • Versioned REST API, OpenAPI 3.1
  • Cloud, private cloud or on-premises
Illustration: ERP, accounting, spreadsheet and custom software systems connect through an API and connector layer to the Invoice And Tax hub, which exchanges e-invoices over the Peppol network and returns status to the source systems.

How does Invoice And Tax connect to my accounting system or ERP?

Through one of six routes: the versioned REST API; the connector framework, which supports REST/JSON, SOAP/XML, OData, GraphQL, SFTP, direct database and local-agent transports; Excel and CSV import; manual entry; the Zoho Books connector; or a custom connector developed for your ERP after a gap analysis. Every route feeds the same validation rules.

Methods

Six ways to connect

  • REST API

    A versioned API with organisation-scoped bearer keys, an OpenAPI 3.1 specification, a Postman collection and a quick-start guide.

    API for developers: REST API
  • Connector framework

    Configurable connectors with REST/JSON, SOAP/XML, OData, GraphQL, SFTP, direct database, local agent and manual upload transports.

  • Excel and CSV import

    Bring invoice data in from spreadsheets through the same composer used for manual entry.

    Excel import: Excel and CSV import
  • Manual entry

    Create documents directly in Invoice And Tax, in Arabic or English.

  • Zoho Books connector

    Bring supported invoice data from Zoho Books into Invoice And Tax through a tested, operational integration workflow.

    Zoho Books: Zoho Books connector
  • Custom ERP connector development

    For other ERP, accounting or POS systems, we can assess and develop a connector after a customer-specific gap analysis.

    Custom connectors: Custom ERP connector development

Connector framework

Transports for real-world systems

Not every system has a modern API. The connector framework lets us reach your data the way your system already exposes it — from a web service to a scheduled file drop — and run it in the deployment mode that suits your IT policy.

  • REST/JSON, SOAP/XML, OData and GraphQL
  • SFTP and manual file upload
  • Direct database access or a local agent
  • Cloud, private cloud, on-premises, desktop or hybrid
ERP / API integrationERP, POS and accounting systems connect to Invoice And Tax through the REST API, file transfer, connectors or spreadsheet import. Invoice And Tax validates, issues and tracks every document and returns statuses.ERPPOSAccountingSpreadsheetsREST API · Connectors · ImportInvoice And TaxValidate · Issue · TrackERP / API integrationERP, POS and accounting systems connect to Invoice And Tax through the REST API, file transfer, connectors or spreadsheet import. Invoice And Tax validates, issues and tracks every document and returns statuses.ERPPOSAccountingSpreadsheetsREST API · Connectors · ImportInvoice And TaxValidate · Issue · Track

Status

Integration routes and formats

Each route shows its real status: available or on request.

  • Available

    REST API

    A versioned REST API (/api/v1/) with organisation-scoped bearer keys, an OpenAPI 3.1 specification, a Postman collection and a quick-start guide.

  • Available

    Connector framework and file transports

    Configurable connectors over REST/JSON, SOAP/XML, OData, GraphQL, SFTP, direct database or a local agent, in cloud, private-cloud or on-premises setups.

  • Available

    Excel and CSV import

    Import invoice data from Excel and CSV files through the same document composer and validation rules as manual entry.

  • Available

    Manual entry

    Create tax invoices, credit and debit notes directly in Invoice And Tax, in Arabic or English.

  • Available

    Zoho Books connector

    Bring supported invoice data from Zoho Books into Invoice And Tax through a tested, operational integration workflow.

  • On request

    Custom ERP connector development

    Connectors for other ERP, accounting, POS or custom systems, assessed and developed after a customer-specific gap analysis.

  • Available

    PINT-OM (UBL 2.1)

    Tax invoices, credit notes and self-billing documents generated in the PINT-OM format, the Oman specification of Peppol International, using UBL 2.1.

  • Available

    Peppol network exchange

    Document exchange over the Peppol network with signed and encrypted AS4 messaging. Invoice And Tax is a Peppol-certified Access Point Service Provider.

Approach

How an integration project runs

  1. 01

    Discover

    We review your systems, document types, volumes and where invoice data originates.

  2. 02

    Map

    Fields from your system are mapped to the document composer and its validation rules.

  3. 03

    Test

    Sample documents run end to end, and validation results are reviewed with your team.

  4. 04

    Go live

    The route is switched on for your organisation, with statuses visible in the platform.

Integration questions

Do you integrate with my ERP?

Most ERPs can be reached through one of the connector framework's transports. ERP integrations are scoped and delivered per project — tell us your system and we will confirm the approach.

Can you build a connector for our ERP?

We can assess your system and version and, where a gap analysis supports it, develop a connector on our connector framework. See custom ERP connector development.

Can we start without an integration?

Yes. Many organisations start with Excel and CSV import or manual entry and add an integration later.

Can we use the Zoho Books connector?

The Zoho Books connector brings supported invoice data into Invoice And Tax through a tested, operational integration workflow. Availability and configuration depend on your organisation, its permissions and the agreed mapping — tell us about your setup.

Can the integration run inside our own network?

Yes. The connector framework supports private-cloud, on-premises, desktop and hybrid deployment, including a local agent.

Planning an integration?

Start with the API documentation, or talk to us about your ERP and how your invoice data flows today.

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