Business-to-Agent is not hypothetical. Below are real, sourced examples of agents discovering, evaluating and transacting, and of the infrastructure making it possible. We cite primary sources and note where something is an emerging pattern rather than a settled fact.
How to read this page:Fact established & sourcedPattern emerging trendAnalysis businesstoagent.com view
Agents that buy
- ChatGPT Instant Checkout: OpenAI and Stripe launched in-chat purchasing on 29 September 2025, starting with Etsy and expanding to over a million Shopify merchants, powered by the open Agentic Commerce Protocol. Fact
- Perplexity shopping: Perplexity added shopping and checkout features for its users, positioning the assistant as a buying surface. Pattern
- Shopify: exposes agent-facing catalogue and checkout so merchants can sell through AI surfaces. Reference Pattern
Rails that let agents pay
- Google Agent Payments Protocol (AP2): an open payments protocol with 60+ partners including Mastercard, PayPal, American Express, Adyen and Coinbase. Google Cloud Fact
- Visa Intelligent Commerce & Mastercard Agent Pay: tokenised, agent-aware payment frameworks; Visa named Anthropic, OpenAI, Microsoft and Perplexity as partners. Coverage Fact
- Mastercard & PayPal: partnered to bring Agent Pay into PayPal's wallet (27 October 2025). PayPal newsroom Fact
Protocols agents run on
- Model Context Protocol (MCP): Anthropic's open standard for connecting agents to tools and data, since adopted by OpenAI and Google. Anthropic Fact
- Agent2Agent (A2A): Google's interoperability protocol between agents. Google Fact
This list is maintained as the field develops. For a structured overview of the whole ecosystem, see the B2A Landscape.
Explore the ecosystem
The companies, protocols and infrastructure enabling B2A.