Computer system for making a payment using a tip button

A host computer system comprising:

• a processor;
• a network interface device connected to the processor;
• a computer readable medium connected to the processor;
• and
• a set of instructions on the computer readable medium that are readable and executable by the processor, including:
• an embedded code generator generating an embedded code for inclusion within a website of a partner computer system, the embedded code including a startup caller causing transmission of a startup call from the sender computer system to the host computer system;
• a startup call responder receiving the startup call from the sender computer system and transmitting, in response to the startup call, a tip button and a session script to the sender computer system, the session script being executable by the sender computer system to transmit a session call to the host computer system;
• and
• a session responder transmitting, in response to the session call, at least one payment button and a payment script to the sender computer system, the payment button being selectable by the user of the sender computer system to execute the payment script, the payment script transmitting an instruction to a transaction processor to transfer funds from a sender account to a receiver account.