# Integrations

To enable real-time tax calculation, we support custom billing flows (via our API) as well as integrations with key billing systems.

 

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>API</strong></td><td><a href="https://970780403-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCwrKUWiKw8qxo6t83mBG%2Fuploads%2FIaM7cLD6jKNHGvVWAuDY%2FAPI.png?alt=media&#x26;token=23331544-fac1-4e8f-935f-45ce9fa294ff">API.png</a></td><td><a href="integrations/api">api</a></td></tr><tr><td><strong>Prebuilt Connectors</strong></td><td><a href="https://970780403-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCwrKUWiKw8qxo6t83mBG%2Fuploads%2FZY5ptrrgfcuT14ijpDnT%2FConnection.png?alt=media&#x26;token=22329d88-0188-41a6-aacb-bc248d6f3887">Connection.png</a></td><td><a href="integrations/prebuilt-connectors">prebuilt-connectors</a></td></tr></tbody></table>