Buyer agents create tokens and send them to seller services to:

Prove identity using kya or kya+pay tokens
Make payments for goods, services, or tools using pay or kya+pay tokens

Each token is issued by a specific buyer agent for a specific seller service.

Seller services define how tokens must be included in requests within their API specification. For example, a seller service may require tokens to be:

Passed in a custom HTTP header
Included in the request body
Provided via another specified mechanism