Stripe introduces machine payments with x402 and USDC on Base.

IMLOVINGCRYPTO
Feb 11
3 min read

Stripe has unveiled a preview of a new feature called machine payments, enabling autonomous AI agents to pay for services directly. The system leverages the x402 protocol and allows developers to charge agents using the USDC stablecoin on the Base network.

According to Jeff Weinstein, Stripe’s product lead, this is just the beginning. The company plans to expand support to additional protocols, currencies, and blockchains over time. The solution is built on Stripe’s PaymentIntents API, allowing businesses to programmatically bill AI agents for API usage, Model Context Protocol (MCP) calls, and standard HTTP requests.

Reviving HTTP 402 for Onchain Payments

At the core of the system is x402, an open payment standard developed by Coinbase. It repurposes the long-unused HTTP 402 “Payment Required” status code, transforming it into a native mechanism for onchain payments embedded directly within web requests.

Weinstein pointed out that today’s financial infrastructure was designed for human not autonomous agents. AI systems require:

Microtransactions

Always-on, global payment rails

Fast settlement and low latency

Automated, programmable flows

Blockchain-based payments and stablecoins offer a natural fit for these needs.

How Machine Payments Work

In the current preview version, the flow operates as follows:

1. A developer creates a PaymentIntent via Stripe.

2. Stripe generates a deposit address.

3. The address is provided to the AI agent, which sends funds or a payment token.

4. The transaction status can be monitored through API calls, webhooks, or the Stripe dashboard.

5. Funds settle once confirmed onchain.

Importantly, sales tax handling, refunds, and reporting remain integrated within Stripe’s existing infrastructure. Developers only need to interact with crypto components if they choose to.

Stripe also released an open-source command-line tool called purl, along with Node.js and Python examples, to help developers experiment with machine payments.

CoinGecko Launches x402-Powered Pay-Per-Use API

At the same time, CoinGecko announced the launch of x402-enabled API endpoints. The integration effectively transforms its API into a pay-per-use service, allowing autonomous agents to access price and onchain data for a flat fee of 0.01 USDC per request without requiring an account or API key.

Supported endpoints include:

Cryptocurrency price queries

Multiple onchain routing endpoints

Coverage of over 18,000 cryptocurrencies

Data across more than 250 blockchain networks

This model enables developers to build autonomous arbitrage bots, onchain risk monitoring systems, and other AI-driven financial tools that can independently pay for data access.

The x402 interaction follows a simple handshake:

1. An agent sends a request to an endpoint.

2. The server responds with HTTP 402 and payment details.

3. The agent attaches a USDC payment authorization.

4. The request is retried and data access is granted.

Stripe’s Growing Valuation

The product announcement coincides with reports that Stripe is exploring a new tender offer that could value the company at approximately $140 billion significantly higher than its previous valuation. In 2023, Stripe raised $6.5 billion in a Series I funding round.

The Rise of the Agent Economy

Stripe’s move into machine payments could mark an important step toward what many call the agent economy a digital ecosystem where autonomous AI systems independently purchase data, services, and computational resources.

If scalable, onchain microtransactions may become foundational infrastructure for AI-native commerce, reshaping how services are monetized on the internet.

Source: The Block

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