Circle dropped a technical specification on Monday that could reshape how autonomous software pays for itself.
The USDC issuer published a formal draft standard for the Machine Payments Protocol at paymentauth.org/draft-usdc-charge-00.html. The spec defines a common way for AI agents and automated services to initiate and settle USDC payments across any EVM-compatible blockchain and Solana.
Think of it as a universal payment handshake for machines. Instead of a human clicking "buy," an agent sends a charge request to another agent's wallet, the recipient authorizes the deduction, and the stablecoin moves – all without a person in the loop. The protocol handles payment authorization, fulfillment verification, and settlement on-chain.
For traders, the immediate read is straightforward: more use cases for USDC means more demand for the stablecoin's liquidity. And because the spec explicitly supports Solana (SOL) as a settlement layer alongside Ethereum-style chains, it gives SOL an additional narrative beyond meme coins and DeFi.
The timing fits a broader push toward autonomous economic activity. AI agents now book travel, trade tokens, and run marketing campaigns. What they lacked was a standardized payment rail that works across different blockchains without custom integration. Circle's spec fills that gap. It also strengthens Circle's position as the infrastructure layer for machine-to-machine commerce – a market that could dwarf human retail payments in transaction count.
Circle published the draft as an internet standard (draft-usdc-charge-00), inviting feedback from developers and protocols. The specification is not final; it is a starting point for industry adoption. If major agent frameworks and DeFi protocols implement it, USDC could become the default settlement currency for AI-driven transactions.
What to watch next: integration announcements from agent frameworks such as Autonolas or Fetch.ai, and whether Solana-based projects like Helius or Jupiter adopt the spec for agent payments. The draft comments period runs through the third quarter. No spec becomes a standard without real deployments, and Circle knows that.
Circle launches universal USDC payment system to enable AI agents to pay autonomously across blockchains
Circle introduced a technical standard allowing AI software to send and receive USDC stablecoin payments automatically across multiple blockchains. This enables automated services and machines to pay each other directly without human involvement, potentially increasing USDC usage and supporting blockchain networks like Solana.