Stablecoin issuer Circle has launched a new USDC Nanopayments testnet, introducing a payment rail designed to enable ultra-small, high-frequency transactions for emerging AI and machine-to-machine (M2M) economies. The system allows developers to send USDC transfers as small as $0.000001 with zero gas fees, a milestone aimed at making micropayments economically viable on blockchain infrastructure.
The testnet rollout reflects a growing push to support “agentic commerce” — a model where autonomous AI agents and applications can exchange small amounts of value frequently without human intervention.
One of the biggest barriers to blockchain micropayments has historically been transaction fees, which often exceed the value of the payment itself. Circle’s Nanopayments system addresses this by bundling many tiny transfers into a single on-chain transaction, dramatically lowering the effective cost per transfer.
Instead of executing every payment directly on the blockchain, the system collects signed payment authorizations off-chain and settles them periodically in batches. This approach allows thousands of micro-payments to be aggregated into one blockchain transaction.
The result is a system where developers can send micro-transactions without worrying about gas costs exceeding the payment amount.
Circle says the infrastructure is specifically designed to support AI agents that transact automatically. These systems may need to send or receive small payments at extremely high frequency, such as paying for data access, API calls, or compute resources.
Potential use cases include:
AI agents paying for data, compute, or APIs
Streaming payments that charge users per second or minute
Usage-based billing for software services
Machine-to-machine transactions between autonomous systems
In more futuristic scenarios, autonomous robots could even pay for services like electricity or maintenance without human intervention.
The nanopayments system operates using USDC, one of the world’s largest dollar-backed stablecoins, which currently has a circulating supply around $76 billion.
Circle says the system is compatible with multiple EVM-based blockchains and follows the x402 protocol standard, designed to support programmable payments across web and blockchain applications.
Developers can experiment with the technology through the testnet while Circle gathers feedback before potential production deployment.
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