Dynamically rendered interface elements during online chat sessions

A non-transitory machine-readable medium having stored thereon machine-readable instructions executable to cause a machine to perform operations comprising:

• dynamically rendering, on a merchant device of a merchant agent for a merchant, a first interface element associated with transmitting a checkout process for a first item to a user during an online chat between the merchant agent and the user using an application programming interface (API) of an online system, wherein the API comprises executable processes for electronic transaction processing of items during the online chat, and wherein the API comprises an integration between a chat platform for the online chat and an online merchant platform for the merchant;
• in response to a selection of the first interface element via the merchant device, determining, using the API, item data for the first item from a digital inventory of the online merchant platform;
• generating, using the API, the checkout process for the electronic transaction processing of the first item using the online system based on the item data;
• and
• dynamically rendering, within a chat interface on a user device of the user for the online chat, an second interface element comprising the item data and an option to perform the electronic transaction processing for the first item via the second interface element with the online system.

A method comprising:

• receiving log data for a communication session between a first computing device for a merchant and a second computing device of a consumer of the merchant;
• determining, based on the log data, that the communication session includes an indication that the consumer is requesting a purchase of an item using a checkout process application programming interface (API);
• acquiring item data for the item from a merchant inventory system of the merchant using the checkout process API;
• generating, using the checkout process API, a checkout process with a transaction processor based on the item data;
• and
• dynamically rendering an interface element within an interface of the second computing device associated with the communication session, wherein the interface element comprises a selectable operation to initiate the checkout process with the transaction processor.