Secure HMRC Connectivity · For IBM i

The OAuth Connector secures every link between your IBM i system and HMRC

A dedicated authentication and connection layer that handles HMRC's OAuth 2.0 requirements directly on your IBM Power server, running natively under IBM i. Token issuing, renewal and encrypted transport — all managed on the platform your data already lives on.

OAuth 2.0 compliant  ·  Native IBM i install  ·  Tokens never leave your server
IBM i HMRC Connected Token-based authentication, end to end

Authentication that never leaves your server

The OAuth Connector is installed directly on your IBM Power server and runs natively under IBM i. Access tokens, refresh tokens and client credentials are generated, stored and renewed on your own system — there's no third-party broker sitting between your business and HMRC.

IBM Power Server IBM i OAuth 2.0 Tokens Stay Local
Key Features

The secure connection layer behind every HMRC submission

Purpose-built for IBM i, the OAuth Connector handles the authentication HMRC requires so your other applications don't have to.

OAuth 2.0 Authentication

Implements the full OAuth 2.0 authorisation code flow required by HMRC's Making Tax Digital APIs, run natively on your IBM i system.

Secure Token Storage

Access and refresh tokens are encrypted and held on your own IBM Power server, never passed through or cached by a third party.

Automatic Token Renewal

Refreshes access tokens ahead of expiry in the background, so connected applications keep submitting without manual re-authorisation.

Encrypted Transport

All traffic between your IBM i system and HMRC's gateway is encrypted in transit, meeting HMRC's connection security standards.

Connection Audit Log

Every authorisation, token refresh & API call is logged on IBM i, giving you a complete record of access to HMRC on your behalf.

One Connector, Many Products

Built to be shared by your MTD VAT Portal and other HMRC-connected applications, so authentication is managed in a single place.

How It Works

From authorisation to API call, in four steps

The OAuth Connector handles the security handshake so your applications only ever see a ready-to-use connection.

1

Install on your IBM Power server

The OAuth Connector is deployed directly onto your existing IBM Power hardware, running natively under IBM i alongside your other applications.

2

Authorise with HMRC

A one-time authorisation grants the connector permission to act on your behalf, following HMRCs standard OAuth 2.0 consent flow.

3

Issue & renew tokens

Access tokens are issued, encrypted & stored on your IBM i server, with automatic renewal so connections don't expire mid-process.

4

Hand off a secure connection

Connected applications like the MTD VAT Portal call HMRC through the connector, which attaches a valid wowtoken to every request.

YOUR IBM POWER SERVER IBM i Apps MTD VAT Portal OAuth Connector runs natively HMRC OAuth Gateway Token issued & verified Tokens are stored only on your own IBM i system, encrypted at rest
Token Lifecycle

Managed automatically, end to end

Once authorised, the connector keeps the connection alive without anyone needing to step in.

ISSUE

Token Issued

HMRC grants an access token and refresh token after successful authorisation.

STORE

Encrypted at Rest

Tokens are encrypted and stored locally on your IBM i system, not in any external service.

USE

Attached to Requests

Every call to HMRC from a connected application carries a valid, current access token.

RENEW

Refreshed Before Expiry

The connector renews tokens automatically ahead of expiry, with no interruption to service.

Why It Stays On IBM i

Security that doesn't leave the platform

Keeping authentication on the same system as your data removes an entire category of external risk.

0

Third-party services holding your HMRC tokens

1

Connector shared across all your HMRC-linked applications

36+

Years of FormaServe IBM i security expertise behind the build

24/7

Connection availability, inherited from your IBM Power uptime

Works alongside the MTD VAT Portal

The OAuth Connector provides the secure HMRC connection that the MTD VAT Portal — and any future HMRC-linked product — submits through.

View MTD VAT Portal

"Their Making Tax Digital solution saved us countless hours. The implementation was smooth & the ongoing support has been excellent. A trusted partner for our IBM i needs."

Keep authentication exactly where your data lives

Talk to FormaServe about installing the OAuth Connector on your IBM Power server, running natively under IBM i.