x402 Triopoly: Solana, Base, Polygon Lead Agent Payments

Cryptocurrency is entering a new competitive phase as artificial intelligence-driven payments move to the forefront. Machine-to-machine transactions are no longer theoretical. Developers are actively building infrastructure that allows AI agents to transact independently, creating a fresh battlefield among blockchain networks.

all x402 transactions are happening on three chains:
– solana
– base
– polygon

will be very interesting to see how that changes with tempo mainnet launch

whoever captures agent payments first has a massive moat pic.twitter.com/ON7Eq3R2ZW

— nairolf (@0xNairolf) February 27, 2026

Recent data shows that x402 transactions cluster heavily around three blockchains: Solana, Base, and Polygon. This concentration signals early infrastructure dominance. Developers favor these networks because they offer high speed and low transaction costs, which are essential for automated payments. As a result, they currently lead the emerging agent-payment economy.

What x402 Means for AI-Driven Payments

The x402 framework enables machine-to-machine payments using HTTP 402, allowing AI agents to pay for services instantly without human intervention. These transactions typically rely on stablecoins to maintain predictable value during transfers. This structure lays the foundation for a new digital economy where autonomous agents can interact, exchange services, and settle payments in real time. Infrastructure choice becomes critical because performance, cost efficiency, and reliability directly affect adoption.

Why Solana, Base, and Polygon Lead

Each of the three leading chains brings distinct advantages. Solana delivers exceptionally high throughput and fast settlement speeds, making it attractive for high-frequency automated payments. Base benefits from its connection to Ethereum’s ecosystem, providing strong developer support and security alignment. Polygon offers scalability, low fees, and compatibility across decentralized applications. Platforms like Polymarket also contribute to Polygon’s transaction activity, reinforcing ecosystem growth. These real-world integrations strengthen network effects and tie payment volume to established platforms.

Tempo Mainnet Could Disrupt the Landscape

A new contender, Tempo, aims to focus entirely on payment infrastructure. Backed by support from Stripe, Tempo emphasizes transaction stability and optimized payment flows. Its testnet is expected to launch in late 2025, with a mainnet rollout projected for 2026. If Tempo delivers superior efficiency and reliability, it could rapidly capture market share and challenge current leaders in the AI payment space.

First-Mover Advantage Will Define Winners

Timing plays a decisive role in infrastructure races. Networks that secure early adoption from AI agents can build strong competitive moats. As solana transaction volume increases, more developers join the ecosystem, reinforcing network effects and accelerating growth. Historically, crypto markets often reward early infrastructure leaders. However, innovation can still disrupt established dominance, especially when new technology offers clear performance advantages.

What This Means for the Future

AI-driven payments could reshape digital finance. Autonomous transactions may soon become standard practice, increasing demand for fast, low-cost blockchains and stablecoin integrations. As adoption grows, competition among networks will intensify. Chains must continuously innovate to remain relevant in this rapidly evolving sector.

Solana, Base, and Polygon currently command the majority of early x402 transaction flows. However, Tempo’s payment-focused model introduces real competitive pressure. The race for dominance in AI-powered payments has only begun, and today’s leaders could shape the long-term structure of this emerging digital economy.