Google has revealed a new step in the future of AI-led finance by launching a protocol that lets AI apps send and receive money, including stablecoins. The tech giant teamed up with Coinbase and the Ethereum Foundation to make it happen. The system is built into Google's Agent Payments Protocol, known as AP2, and is open-sourced.

Along with Coinbase, over 60 firms are also taking part to ensure it works with both digital assets and traditional finance. These include American Express, Salesforce, Etsy, PayPal, and many more.

Stablecoin Support Built In

The update means that AI agents built with Google's tools can now handle real payments. That includes support for stablecoins: crypto tokens pegged to real-world currencies like the US dollar. These tokens are widely used in the crypto world for their price stability.

Google's partnership with Coinbase brings x402 into the protocol, which powers stablecoin transactions. This upgrade makes it possible for agents to not only chat with each other but also complete payments. That's a major shift from earlier setups that required users to manually step in.

The Coinbase-built x402 system works with USDC, a major stablecoin in the market. This lets agents settle transactions automatically without needing bank cards or user input at each stage.

AI Agents That Can Pay

The system comes at a time when AI agents are gaining more freedom to act on behalf of users. With this tech, a person can now ask an AI to perform tasks like buying concert tickets, booking a hotel, or even managing subscriptions without touching a button.

To do this safely, AP2 uses what it calls "Mandates." These are cryptographically signed digital contracts. They work as proof that the agent is acting on real user instructions. There are two kinds: one for when the user is present and one for when the agent is acting on pre-set rules.

Let's say you ask an agent to buy you a green winter jacket if it drops below a certain price. Once the agent sees a match, it can check out and pay automatically, backed by the contract you signed. This signed record helps confirm the purchase, prevent fraud, and prove the agent had permission.

Coinbase Extension Powers Crypto Use

Coinbase is the first to add a stablecoin-focused extension to Google's protocol. Named x402, this tool allows agents to pay each other using USDC. It was made with the idea that agents would need an easy and instant way to complete tasks involving money.

For example, if a research agent wants to pull data from an archive, it can pay another agent per document retrieved. That micropayment can be handled in real time using USDC. There's no waiting for credit card processing or invoice approvals. It's all handled at the speed of code.

Coinbase showed off this system in a test built for Lowe's Innovation Lab. In the demo, the agent helped a user buy a refrigerator. From reading the request to recommending the best options and checking out with crypto, the process was smooth and automatic. Everything was done by the agent after a few simple prompts.

Huge Industry Support

Many major companies are joining in to test and use AP2. Brands like Mastercard, MetaMask, American Express, Adobe, and Dell have shown support for the open-source effort. Some see this as the start of a new system for digital commerce, powered by AI and smart contracts.

MetaMask noted that blockchain is well-suited for these tasks and that Ethereum will serve as a backbone for agentic payments. Other partners like Intuit and ServiceNow are planning to use these agents to help automate business tasks like license renewals and software orders.

Google made the full spec for AP2 public, allowing developers to explore it on GitHub. The company says more updates are in the works and invites the whole tech industry to help shape what comes next.

Real Market Momentum

This move arrives during a sharp rise in stablecoin use. According to data from DefiLlama, about $289 billion worth of stablecoins are currently in circulation. That's up from $205 billion at the start of the year. The jump reflects growing interest in digital dollars as a way to move money fast, often without touching a bank.

Circle, the issuer of USDC, is preparing for a public listing following strong investor interest. Many see stablecoins as a key part of the next wave of internet finance. With companies like Google and Coinbase now backing stablecoin payments for AI agents, the vision is starting to take shape.

How the System Works

Google's system is based on two earlier standards it launched: Agent2Agent (A2A) and Model Context Protocol (MCP). AP2 builds on that, adding payment support. It is meant to work with all payment types, whether it's a credit card, bank transfer, or crypto tokens.

The system uses digital credentials to make sure agents are acting with permission. These credentials are tied to mandates, which are locked-in records of a user's intent. When a payment is made, that mandate becomes the proof. This avoids confusion and reduces fraud.

Whether it's buying an item in real time or handling a task while the user is away, the process always includes a signed record of what was bought, for how much, and why. That gives merchants, payment networks, and users the confidence they need.

Designed for Growth

Google said the system was built to scale and adapt. The design is flexible enough to support not only today's tools but also whatever comes next. As more agents go live and more services are added, the framework can grow without needing to be replaced.

Coinbase added that with x402 now part of the system, developers can begin testing out stablecoin use right away. Whether it's for pay-per-use services, tipping, or buying data, the goal is to enable payments that work at internet speed.

And for businesses, it unlocks a new path to automate spending and earning without relying on traditional bank rails. Agents can now operate more like workers with their own wallets, ready to buy and sell as needed.

Closing In on Autonomous Commerce

This update marks one of the biggest moves so far in bringing crypto and AI together. By opening up AP2 to both credit cards and stablecoins, Google and its partners are trying to build a new kind of internet transaction.

While it may not have a direct impact on web3 games just yet, the growth of crypto payments in AI-led systems points to broader changes. When agents can act, shop, and pay without help, the next phase of digital economy starts to take shape.

Developers can now explore the tools on GitHub and begin building. Google says more demos, updates, and features are on the way. With stablecoins in play and AI at the helm, the future of online transactions is moving fast.