AI agents need to pay for things. The infrastructure to make that possible is being built right now: by crypto protocols, payment networks, and every major financial platform simultaneously. This is who's building it.
Where agent intent originates — the task the agent is trying to accomplish, from querying a data API to deploying compute. This is where revenue happens first and why it's the most crowded layer.
L4Governance & PolicyMay this agent spend32 projects
The policy layer that determines whether an agent is allowed to spend — budget limits, per-merchant allow-lists, time-boxed windows, and human approval thresholds for large transactions. No standard has won here yet.
L3Payment ProtocolHow the payment flowsx402 · 75M txns/30d
The message format that carries a payment request — x402 uses HTTP 402 headers so an agent can discover, negotiate, and pay in a single round-trip. MPP and L402 are competing standards; the market will likely support two.
Picks the cheapest, fastest path from one chain or token to another — in practice almost always Base settling in USDC. Cross-chain swaps only trigger when the destination requires a different asset.
L1Wallet & Key MgmtWhere the keys liveReown · 854K npm/wk
Every transaction needs a signer — an embedded wallet the agent controls, with programmable rules for what it can spend. Coinbase AgentKit is the most integrated option; Fireblocks acquired Dynamic to enter this layer from the institutional side.
Where value actually moves — 98.6% of tracked agent payments settle in USDC, with Base as the dominant chain because it is cheap enough for micropayments and fast enough for real-time interactions.