Malaysia e-Invoice (MyInvois) — for humans and their AI

Talk to Claude, get a validated LHDN e-invoice. This repo gives your AI the skill + MCP tools to handle the whole journey — getting API access on the hasil.gov.my portal, keeping your company & client records, submitting, and sending the result to your customer.

Unofficial · not affiliated with LHDN · you are responsible for your own tax submissions. Sandbox by default — nothing touches production unless you opt in.

Where are you in the journey?

flowchart TD
    A{"Do you have MyInvois<br/>API keys?"} -->|no| B["① Get access<br/>one-time only · guided walkthrough"]
    A -->|yes| C["② Configure & setup<br/>one-time only · company & clients"]
    B --> C
    C --> D{"Day-to-day"}
    D --> E["③ Submit an e-invoice<br/>new client → purchase → send"]
    D --> F["④ Check invoices<br/>status · history · cancel"]
    D --> G["⑤ Record a supplier bill<br/>self-billed, foreign vendors"]
    E --> H["📧 Email PDF + QR<br/>to your client"]

    classDef ask fill:#F6C915,stroke:#1B2A4A,stroke-width:2px,color:#1B2A4A
    classDef journey fill:#1B2A4A,stroke:#1B2A4A,color:#FAF9F5
    classDef result fill:#FAF9F5,stroke:#1B2A4A,stroke-width:2px,color:#1B2A4A
    class A,D ask
    class B,C,E,F,G journey
    class H result
    linkStyle default stroke:#1B2A4A,stroke-width:2px
    click B "https://techtemplemy.github.io/e-invoice-malaysia-mcp/guide-access.html" "Get access — guided walkthrough"
    click C "https://techtemplemy.github.io/e-invoice-malaysia-mcp/guide-configure.html" "Configure & setup"
    click E "https://techtemplemy.github.io/e-invoice-malaysia-mcp/guide-submit.html" "Submit an e-invoice"
    click F "https://techtemplemy.github.io/e-invoice-malaysia-mcp/guide-check.html" "Check invoices"
    click G "https://techtemplemy.github.io/e-invoice-malaysia-mcp/guide-selfbill.html" "Record a supplier bill"

Open a journey: ① get access · ② configure & setup · ③ submit · ④ check · ⑤ self-billed (chart nodes are clickable in editors that allow it; GitHub disables in-chart links, so use these)

Each step below has a copy-paste prompt for Claude and a no-AI fallback. Prefer clicking through screens? The visual guide hub has one page per journey ①–⑤, each opening with the same copy-paste Claude prompt.

Related MCP server: mcp-facturacion-electronica-es

① Get access — you have no API keys yet (one-time only)

💬 Say to Claude: "Use the myinvois skill. I'm new to Malaysia e-invoicing — get me MyInvois sandbox API access for my company, step by step. Open the portal pages for me as we go."

Claude walks you through the LHDN portal (it can open the hasil.gov.my pages in a browser alongside you), warns you about the two traps everyone hits (registering under your personal profile instead of the company; clock-skew rejections), saves your keys to ~/.myinvois.env, and proves the connection with a live token call.

No AI? Follow the get-access page — mock portal screens plus a .env generator.

② Configure & setup — you have keys (one-time only)

💬 Say to Claude: "Use the myinvois skill. I already have my MyInvois client ID and secret — set up my credentials, my company profile, and my client book."

Claude collects your seller details (TIN, BRN, MSIC, address), validates your TIN against LHDN live, and writes two small local files that every future invoice reuses: ~/.myinvois-profile.json (you) and ~/.myinvois-clients.json (who you bill). Nothing is stored anywhere else.

No AI? The configure page has in-browser generators for both files.

③ Submit an e-invoice

a — new client?

💬 "Save a new client: ACME Sdn Bhd, BRN 201901234567 — look up and validate their TIN first." → MCP: search_tin → validate_tin → client book.

b — the purchase / invoice itself

💬 "Here's my invoice PDF — submit it to MyInvois. Show me the summary before sending." (or just describe the line items in chat)

Your AI extracts buyer + lines, builds the UBL document from your profile, always shows you a summary and waits for your yes (draft_invoice → confirm_submission, enforced in code), then returns the LHDN validation link.

c — send it out

💬 "Email the invoice PDF with the validation link and QR to accounts@acme.com." — works if your Claude has an email connector (Gmail / Outlook); otherwise make the QR with npx qrcode "<link>" -o qr.png and attach it yourself. The invoice maker builds a print-ready PDF with the QR embedded — fonts, logo, your colours.

④ Check invoices

💬 "Show my e-invoices from the last month" · "What's the status of INV-2026-0012?" · "Cancel INV-2026-0012 — wrong amount."

MCP: list_recent_documents, get_document, cancel_document (cancel window is 72 hours; cancelling asks you to confirm first).

⑤ Record a supplier bill (self-billed)

Foreign vendors (OpenAI, Hostinger, AWS…) never send Malaysian e-invoices — you must issue a self-billed one to claim the expense, by end of the month after payment.

💬 "Here's my OpenAI receipt — create the self-billed e-invoice for it."

The vendor goes in as supplier (generic TIN EI00000000030), your company as buyer, type 11 — same confirm-before-submit flow.

How it's wired

Three frontends, one shared core, everything on your machine — the only thing that ever leaves is the HTTPS call to LHDN:

flowchart LR
    subgraph yours["Your machine — nothing else sees your data"]
        direction LR
        U["You + your AI<br/>Claude Code · Desktop · Cursor"]
        SK["Claude skill<br/>SKILL.md + zero-dep CLI"]
        MCP["MCP server<br/>npx e-invoice-malaysia-mcp"]
        WEB["static pages<br/>guide · invoice maker"]
        LIB["shared core<br/>auth · UBL builder · API client"]
        CFG[("~/.myinvois.env<br/>profile · client book")]
        U --> SK
        U --> MCP
        U --> WEB
        SK --> LIB
        MCP --> LIB
        CFG -.-> LIB
    end
    LIB ==>|HTTPS| LHDN["LHDN MyInvois API<br/>sandbox → prod"]
    LHDN --> OUT["✓ validated e-invoice<br/>share link + QR → email your client"]

    classDef ask fill:#F6C915,stroke:#1B2A4A,stroke-width:2px,color:#1B2A4A
    classDef comp fill:#1B2A4A,stroke:#1B2A4A,color:#FAF9F5
    classDef store fill:#FAF9F5,stroke:#1B2A4A,stroke-width:2px,color:#1B2A4A
    classDef gov fill:#C0321C,stroke:#C0321C,color:#FAF9F5
    class U ask
    class SK,MCP,WEB,LIB comp
    class CFG,OUT store
    class LHDN gov
    style yours fill:#FAF9F5,stroke:#1B2A4A,stroke-width:2px,color:#1B2A4A
    linkStyle default stroke:#1B2A4A,stroke-width:2px

Safety is structural, not polite: submissions are a two-step draft_invoice → confirm_submission with a one-time token, sandbox is the default environment, and the skill/MCP always show you a summary before anything reaches LHDN.

Install

Claude Code (skill — recommended start):

git clone https://github.com/techtemplemy/e-invoice-malaysia-mcp
cp -r e-invoice-malaysia-mcp/skills/myinvois ~/.claude/skills/myinvois

Claude Desktop / Cursor / any MCP client:

{ "mcpServers": { "myinvois": {
    "command": "npx", "args": ["-y", "e-invoice-malaysia-mcp"],
    "env": { "MYINVOIS_CLIENT_ID": "…", "MYINVOIS_CLIENT_SECRET": "…", "MYINVOIS_ENV": "sandbox" }
} } }

Zero-dependency CLI (Node ≥ 18, no install)

node skills/myinvois/scripts/myinvois.mjs token
node skills/myinvois/scripts/myinvois.mjs validate-tin C1234567890 BRN 202001234567
node skills/myinvois/scripts/myinvois.mjs search-tin BRN 202001234567
node skills/myinvois/scripts/myinvois.mjs submit my-invoice.json --stamp
node skills/myinvois/scripts/myinvois.mjs submission <submissionUid>
node skills/myinvois/scripts/myinvois.mjs document <uuid>

11 commands total — also recent, raw, cancel, reject, doctypes.

MCP server (e-invoice-malaysia-mcp)

11 tools: validate_tin, search_tin, get_supplier_profile, draft_invoice, prepare_ubl_submission, confirm_submission, get_submission, get_document, list_recent_documents, cancel_document, reject_document. Two-step submit (one-time confirmation token, 10-min TTL), sandbox default, local stdio, no telemetry. Local checkout: claude mcp add myinvois -- node <repo>/mcp/server.mjs.

Repo layout

docs/                        # static site: setup guide · invoice maker · landing
skills/myinvois/             # standalone Claude Code skill
  SKILL.md                   #   3-phase workflows
  scripts/myinvois.mjs       #   the CLI
  templates/ references/     #   UBL template · field rules · every endpoint as curl
lib/ + mcp/server.mjs        # the npm package (this repo root)
postman/                     # official LHDN Postman collection + environments

Field-tested

Real sandbox submissions, validations, and rejections — every trap we hit is documented in references/api.md (wrong-role ERP registration, CF321 clock skew, ERR236 consolidated classification…).

License

WTFPL — do what you want with it.