Modifying a user interface to make a card associated with an entity available at a relevant time

A method of modifying a document used to generate a web page to be provided for display by a device, comprising:

• detecting, by a browser extension executing on the device, that the web page is associated with an entity and an exchange associated with the entity;
• transmitting, by the browser extension and to a server, web page information that identifies at least one of:
• the entity associated with the web page, or
• an amount of the exchange associated with the entity;
• receiving, by the browser extension and from the server, presentation information that identifies card information for one or more cards that are associated with the entity,
• wherein card information associated with a card, of the one or more cards,
• identifies information associated with resources associated with the card;
• modifying, by the browser extension, the document used to generate the web page based on the presentation information, wherein modifying the document causes the card information for the one or more cards to be provided for display via the web page;
• and
• displaying, by the device, the web page based on modifying the document used to generate the web page.

A system, comprising:

• one or more memories;
• and
• one or more processors, communicatively coupled to the one or more memories, configured to:
• receive, from a web browser extension executing on a first client device, information that identifies:
• an entity associated with a graphical user interface being presented for display by a web browser executing on the first client device, and
• transaction information that is being presented for display by the web browser;
• identify one or more cards based on the information using a data structure that stores card information, wherein the one or more cards are associated with users that are different than a user of the first client device;
• determine, from the one or more cards, a card to be provided to the first client device;
• and
• transmit, to the first client device, card information that identifies information associated with resources of the card.