The MyInvois API Explained: Technical Requirements for Malaysian Businesses

Understanding the Technical Side of MyInvois Compliance

As Malaysia transitions to mandatory e-invoicing through the MyInvois system, businesses face not only procedural changes but also technical requirements for connecting with LHDN's systems. For many businesses, especially those without dedicated IT departments, these technical aspects can seem daunting.

This guide breaks down the technical requirements of the MyInvois API in plain language, helping business owners and decision-makers understand what's needed for compliance without getting lost in technical jargon.

What is the MyInvois API?

API stands for Application Programming Interface—essentially, it's how different software systems communicate with each other. The MyInvois API is the technical connection that allows your invoicing system to communicate directly with LHDN's e-invoicing platform.

Through this API, businesses can:

• Submit new invoices to LHDN in real-time
• Receive validation responses and digital signatures
• Check the status of submitted invoices
• Retrieve QR codes for invoice verification
• Cancel or credit previously issued invoices

Essential Technical Requirements

API Credentials

To connect to the MyInvois system, businesses need specific security credentials:

• API Key: A unique identifier issued by LHDN after registration
• Authentication Token: Used to verify your identity with each API call
• Business ID: Your registered business identifier in the MyInvois system

These credentials must be securely stored and managed, as they control access to your invoicing data and LHDN submissions.

Data Format Requirements

The MyInvois API requires data to be formatted in a specific way:

• JSON Format: Data must be structured in JavaScript Object Notation
• Required Fields: Each invoice must include all mandatory fields as specified in LHDN's documentation
• Data Validation: All fields must meet format requirements (length, type, pattern)
• Character Encoding: UTF-8 encoding is required to support multilingual content

Connection Requirements

To communicate with the MyInvois API, businesses need:

• Secure HTTPS Connection: All communications must be encrypted
• TLS 1.2 or Higher: Older security protocols are not supported
• Reliable Internet Connection: To ensure successful transmission of invoice data
• Proper Error Handling: Systems must appropriately respond to API errors and status codes

Key API Endpoints and Functions

The MyInvois API includes several key endpoints (specific addresses within the API) for different functions:

Invoice Submission

The primary function of the API is submitting new invoices:

• Endpoint: /e-invoice/submit
• Method: POST
• Purpose: Submit a new invoice for validation and registration
• Response: Success confirmation, LHDN invoice reference, and QR code data

Invoice Verification

Businesses can check the status of previously submitted invoices:

• Endpoint: /e-invoice/verify
• Method: GET
• Purpose: Verify if an invoice has been properly registered with LHDN
• Response: Current status and validation details

Credit Note/Cancellation

For adjusting or canceling previously issued invoices:

• Endpoint: /e-invoice/credit
• Method: POST
• Purpose: Issue a credit note or cancellation for an existing invoice
• Response: Confirmation of credit note registration

Common Technical Challenges

Businesses implementing the MyInvois API often encounter these challenges:

Authentication Errors

Issues with API credentials can prevent successful connections:

• Invalid or expired API keys
• Incorrectly implemented authentication headers
• Missing or incorrect business identifiers

Data Validation Failures

Invoices may be rejected due to data issues:

• Missing required fields (like Tax Identification Numbers)
• Incorrect data formats (dates, numbers, tax codes)
• Invalid tax calculations or totals
• Character encoding problems with multilingual content

Connection and Timeout Issues

Network-related problems can disrupt API communications:

• Unreliable internet connections
• Server timeout during peak processing periods
• Firewall or security settings blocking API connections

Error Handling Deficiencies

Many implementations fail to properly manage API responses:

• Not capturing and logging error messages
• Failing to implement retry logic for temporary failures
• Not providing user-friendly error explanations

Implementation Options for Businesses

Businesses have several options for implementing the MyInvois API:

Direct API Integration

Best for: Large companies with IT departments or custom ERP systems

Requires: Developer resources, custom coding, and ongoing maintenance

Pros: Full customization and direct integration with existing systems

Cons: High implementation cost and technical complexity

Accounting Software Updates

Best for: Businesses using popular accounting software

Requires: Software provider to offer MyInvois-compatible updates

Pros: Integration with existing financial systems

Cons: Dependent on software provider's timeline and implementation

Third-Party E-Invoicing Platforms

Best for: Small and medium businesses without technical resources

Requires: Subscription to a compliant e-invoicing service

Pros: No technical implementation needed, ready to use

Cons: Potential integration gaps with existing systems

How MyEzyInvois Eliminates Technical Complexity

At MyEzyInvois, we understand that most businesses want to achieve MyInvois compliance without becoming technical experts. That's why we've created Malaysia's simplest plug-and-play e-invoicing solution that handles all the technical complexity for you:

• No API coding required: Our platform manages all API communications with LHDN
• Simple credential management: Securely store your MyInvois API credentials in your profile
• Automatic data validation: Our system checks all required fields before submission
• Built-in error handling: Clear, non-technical explanations when issues arise
• Guaranteed format compliance: All invoices are formatted to meet LHDN requirements
• Secure data transmission: Enterprise-grade security for all API communications
• Comprehensive reporting: Track all submissions and maintain complete audit trails

With MyEzyInvois, you don't need to understand API endpoints, JSON formatting, or HTTP status codes. Our intuitive interface lets you create and submit compliant invoices with just a few clicks, while our system handles all the technical requirements behind the scenes.

As Malaysia's most affordable e-invoicing solution with no registration fees, MyEzyInvois makes MyInvois compliance accessible to businesses of all sizes, regardless of technical expertise. Focus on running your business while we handle the technical complexities of e-invoicing compliance.