# Initiate transactions

Process an e-commerce, MOTO, or in-store transaction.

The Transactions API provides a single endpoint to process transactions with, regardless of the card entry type. An **entry type** describes the origin of a transaction. Each one comes with its own risk profile, so this classification is crucial for applying the appropriate security measures and compliance standards.

You can initiate a transaction for the following entry types:

* **[E-commerce](/guides/transactions/e-commerce/card-transaction):** for online transactions.
* **[MOTO](/guides/transactions/moto/card-transaction):** for Mail Order/Telephone Order transactions.
* **[In-store](/guides/transactions/in-store/card-transaction):** for transactions made in a physical retail environment.