Managing Offers from Agents

Our app allows shops to accept offers from consumers via the storefront. As agents search products, we are trying to ascertain if we can surface to the agent that the shop accepts offers from consumers/agents, and then share the json load the agent should provide and the api endpoint on the shop that receives the payload and process the offer using a rules engine the shop manages. It could include a counter offer, so if an Agent offers $75 for a $99 offer the shop could counter offer IRT with $80 and $5 flat shipping to try an secure the order.

Is there a way to surface that for the shop? We are looking at some discoverability on the api endpoint, the offers currently go through an app proxy using JWT.

Forgot to add the source of my question from the Shopify Concepts - extensions