# Great Southern Bank

**Canonical:** https://apis.io/providers/great-southern-bank/  
**Website:** https://www.greatsouthernbank.com.au/  
**APIs profiled:** 7

Great Southern Bank is one of Australia's largest customer-owned (mutual) banks, operating as a business name of Credit Union Australia Ltd (ABN 44 087 650 959, AFSL and Australian Credit Licence 238317). Formerly known as Credit Union Australia (CUA) before rebranding to Great Southern Bank in 2021, it is owned by its customers rather than shareholders and serves retail and small-business members with transaction accounts, savings, term deposits, home loans, credit cards, and insurance. As an Australian authorised deposit-taking institution (ADI) it participates in the Consumer Data Right (CDR / Open Banking) as a data holder, exposing public, unauthenticated Product Reference Data (PRD) APIs for both its retail and Business+ brands that conform to the Data Standards Body (DSB) Consumer Data Standards (CDS). Authenticated consumer data sharing is available only to accredited data recipients (ADRs) via the CDR ecosystem; the bank does not operate a self-serve public developer portal.

## Kin Score — 47.3 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 47.3).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 51.0 |
| Governance | 30.3 |
| Contract Governance | 30.3 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

Regulatory layer — **Banking & Open Finance**: 67.1 (matched via tags).

## Agent readiness — 31.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (7)

- **Great Southern Bank Banking Account Balances API** — Banking Account Balance endpoints
- **Great Southern Bank Banking Account Direct Debits API** — Banking Account Direct Debit endpoints
- **Great Southern Bank Banking Account Scheduled Payments API** — Banking Account Scheduled Payment endpoints
- **Great Southern Bank Banking Account Transactions API** — Banking Account Transaction endpoints
- **Great Southern Bank Banking Accounts API** — Banking Account endpoints
- **Great Southern Bank Banking Payees API** — Banking Payee endpoints
- **Great Southern Bank Banking Products API** — Banking Product endpoints

## MCP servers (1)

- **Great Southern Bank MCP Server**

## Security (2)

- **Great Southern Bank Authentication** — none/oauth2/openIdConnect/mutualTLS · 4 schemes
- **Great Southern Bank Domain Security** — TLSv1.3 · DMARC

## Tags

Financial, Banks, Open Banking, CDR, Consumer Banking, Australia, Customer Owned, Product Reference Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/great-southern-bank/). Scores are computed from the provider's own public artifacts under a published rubric.