> 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/api-references/tieto-saas-aggregation.md).

# Tieto SaaS Aggregation

Connect your product to European banks through Tieto's managed aggregation service. These APIs work together to help you discover available banks, prepare authentication where a bank requires it, and access account data or initiate payments. Tieto maintains the bank connections and their local variations, so your team can focus on the services your customers use.

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><i class="fa-building-columns" style="color:$primary;">:building-columns:</i></h3></td><td><strong>Provider Discovery</strong></td><td>Find available banks and build a bank selector that reflects your application's access.</td><td><a href="/api-references/tieto-saas-aggregation/provider-discovery.md">Provider Discovery</a></td></tr><tr><td><h3><i class="fa-fingerprint" style="color:$primary;">:fingerprint:</i></h3></td><td><strong>Pre-steps and Authentication</strong></td><td>Handle the customer details and authentication choices a bank needs before an account or payment journey.</td><td><a href="/api-references/tieto-saas-aggregation/pre-steps-and-authentication.md">Pre-steps</a></td></tr><tr><td><h3><i class="fa-money-bill-transfer" style="color:$primary;">:money-bill-transfer:</i></h3></td><td><strong>Aggregated XS2A</strong></td><td>Build account data and payment services through a consistent interface across connected banks.</td><td><a href="/api-references/tieto-saas-aggregation/aggregated-xs2a.md">Aggregated XS2A</a></td></tr></tbody></table>


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