> For the complete documentation index, see [llms.txt](https://doc.api.tieto.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.api.tieto.com/portals-and-interfaces.md).

# Portals and Interfaces

The Developer Portal, Central Portal, Bank Portal and API Gateway — four surfaces, each built for a different audience.

The platform presents four distinct surfaces. Three are web portals, each scoped to one audience and its responsibilities. The fourth is the runtime interface every API call passes through.

|                                                                 |                       |                                                                                                                                      |
| --------------------------------------------------------------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| [Developer Portal](/portals-and-interfaces/developer-portal.md) | Third-party providers | Product catalog, documentation and references, sandbox, certificate and application management, subscriptions, own-traffic reporting |
| [Central Portal](/portals-and-interfaces/central-portal.md)     | Platform operator     | Tenant onboarding, third-party governance, API publication and policy, approvals queue, portal content, platform-wide oversight      |
| [Bank Portal](/portals-and-interfaces/bank-portal.md)           | Participating bank    | Subscription terms and tariffs, consent oversight and revocation, the bank's own administrators, regulatory reporting                |
| [API Gateway](/portals-and-interfaces/api-gateway.md)           | Runtime               | Identity and authorization, version resolution, policy enforcement, routing to the right bank and environment, error handling        |

## How they divide responsibility

The separation is deliberate and it is what makes shared infrastructure workable between institutions that compete.

* The **operator** onboards banks and third parties, publishes APIs, and configures subscriptions — but does not set or see commercial tariffs.
* The **bank** sets its own limits and pricing, manages its customers' consents, and reports on its own interface — without visibility into other tenants.
* The **third party** manages its own credentials, applications and team, and sees only its own traffic.

Consequential changes on either administrative side require a second approver, and neither operator nor bank sees the other's pending or rejected changes.


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