Cryptocurrency is entering a new competitive phase as artificial intelligence-driven payments move to the forefront. Recent data reveals that the majority of transactions using the emerging x402 protocol—a framework enabling machine-to-machine payments—are heavily concentrated on three blockchain networks: Solana, Base, and Polygon. This clustering signals early infrastructure dominance in the autonomous AI payment economy.
Data from SolanaFloor shows that as of the week ending February 9, 2026, Solana accounts for approximately 49% of all x402 agent-to-agent transaction market share, establishing it as the dominant chain. Base has been the consistent second-place competitor, while Polygon, BNB, Celo, Optimism, and Arbitrum represent smaller, fractional shares. The trajectory has been volatile; Solana's share collapsed to near zero in October-November 2025 before recovering sharply, peaking near 80-90% in early January 2026 before settling at the current level.
The x402 framework enables AI agents to pay for services like compute resources and API access instantly using HTTP 402, typically relying on stablecoins for predictable value. This creates a foundation for a new digital economy where autonomous agents interact and settle payments without human intervention. The choice of underlying blockchain is critical, as performance, cost efficiency, and reliability directly affect adoption.
Each leading chain brings distinct advantages. Solana's appeal lies in its exceptionally high throughput, millisecond transaction speeds, and fees measured in fractions of a cent—essential for high-frequency, low-value micropayments. Base benefits from its connection to Ethereum's ecosystem, offering strong developer support and security alignment. Polygon offers scalability, low fees, and broad compatibility across decentralized applications, with platforms like Polymarket contributing to its transaction activity.
The landscape faces a potential disruptor. A new contender, Tempo, backed by Stripe, aims to focus entirely on payment infrastructure. Its testnet is expected in late 2025, with a mainnet rollout projected for 2026. If Tempo delivers superior efficiency and reliability, it could challenge the current leaders.
The race highlights a first-mover advantage. Networks that secure early adoption from AI agents can build strong competitive moats through network effects. The data aligns with a vision outlined by Tether CEO Paolo Ardoino, where AI agents become primary users of stablecoin infrastructure requiring permissionless, 24/7 payment rails. As AI agent deployment accelerates, the chain holding dominant share in x402 transactions is structurally positioned to benefit from this growth.
