# PIS

Payment Initiation Service.


Payment initiation is done using the **integrated OAuth2** authentication flow described in NextGenPSD2
specifications.
This means you first have to initiate a payment using the dedicated endpoint, then redirect the PSU to our 
authorisation page following the link present in the response (using `PIS:{paymentId}` as OAuth2 scope).
After performing a strong customer authentication, the PSU will be redirected to your redirect URI with an
**authorisation code** that you can then exchange for an **access token**.


This **access token** is only needed to cancel a payment on behalf a PSU (this does not require a strong
customer authentication). It is not needed to retrieve the current status of a payment.



## Operations
- [Get payment information](https://docs-nextgenpsd2.api.memo.bank/operation/operation-getpaymentinformation.md)
- [Cancel a payment.](https://docs-nextgenpsd2.api.memo.bank/operation/operation-cancelpayment.md)
- [Get payment initiation status](https://docs-nextgenpsd2.api.memo.bank/operation/operation-getpaymentinitiationstatus.md)
- [Initiate a payment](https://docs-nextgenpsd2.api.memo.bank/operation/operation-initiatepayment.md)

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