Systems and methods for facilitating payment service-based checkout with a merchant

A method for facilitating payment service-based guest checkout with a merchant, comprising:

• in an issuer payment service comprising at least one computer processor:
• receiving, from an issuer application or website executed on a customer electronic device, a request for wallet information for a customer, the issuer application or website involved in a redirected online interaction with the customer from a merchant application or website;
• retrieving the wallet information for the customer;
• communicating the wallet information to the issuer application or website;
• receiving a selection of a payment option from the issuer application or website;
• communicating a session identifier to the merchant application or website;
• receiving, from a merchant payment host for the merchant, the session identifier and a request for the selected payment option;
• and
• communicating the selected payment option to the merchant payment host;
• wherein the merchant payment host executes a transaction with the customer using the selected payment option.

A system for facilitating payment service-based guest checkout with a merchant, comprising:

• an issuer information processing apparatus comprising at least one computer processor executing an issuer's payment application or website and an issuer payment service;
• a merchant information processing apparatus comprising at least one computer processor executing a merchant's application or hosting a merchant website, and a merchant payment host;
• wherein:
• the merchant application or website receives an identification of a good or service to purchase in an online interaction with a customer;
• the merchant application or website receives a selection of a payment service associated with an issuer of a financial instrument;
• the merchant application or website redirects the online interaction to the issuer payment application or website;
• the issuer payment application or website retrieves wallet information comprising a plurality of payment options for the customer, from the issuer payment service;
• the issuer payment application or website receives a selection of one of the payment options and provides the selection to the issuer payment service;
• the issuer payment service generates a session identifier and provides the session identifier to the merchant application or website;
• the merchant application or website provides transaction information for the identified good or service to the merchant payment host;
• the merchant payment host retrieves the selected payment option from the issuer payment service using the session ID;
• and
• the merchant payment host conducts the transaction using the selected payment option.