TLDR:
- Circle Nanopayments enables gas-free USDC transfers as small as $0.000001, built on Circle Gateway infrastructure.
- Batched on-chain settlement bundles thousands of transactions, with Circle covering all gas costs at the settlement layer.
- The x402-compatible system lets agents pay merchants instantly with no account creation or credit card required.
- A robot dog autonomously paid for its own recharging in USDC, marking a real-world agentic commerce milestone.
Circle Nanopayments is now live on testnet, enabling gas-free USDC transfers as small as $0.000001. Built on Circle Gateway, the payments primitive is designed for the emerging agentic economy.
It allows developers to build pay-per-call APIs, real-time compute billing, and machine-to-machine payment flows.
Sub-cent transactions, previously unworkable due to high gas fees, are now economically viable at scale. Circle has introduced batch on-chain settlement to remove per-transaction costs entirely for developers.
How Circle Nanopayments Solves the Sub-Cent Problem
Traditional payment rails, built decades ago, were not designed for high-frequency sub-cent transactions at agent scale. Fixed fees and overhead make ultra-small payments unworkable on legacy systems.
Even modern onchain transactions face barriers when settled individually. On low-cost blockchains, fees for a $0.0001 transfer can reach 1,000% to 5,000% of the payment amount.
Circle Nanopayments resolves this through off-chain aggregation and batched on-chain settlement. Thousands of transactions are bundled into a single onchain batch, reducing each transaction’s gas cost to zero.
Circle covers the on-chain costs at the settlement layer. This lets agents transact nearly instantly, with settlement handled seamlessly in the background.
When an agent initiates a payment, it signs an EIP-3009 authorization message and submits it to the API. The system validates the signature and adjusts the agent’s internal ledger balance accordingly.
The merchant then receives instant confirmation and can release goods or services right away. Actual onchain settlement occurs periodically and does not interrupt the workflow.
Circle announced the launch on X, noting the system follows the x402 standard. The x402 standard lets any agent pay any merchant without creating an account or adding a credit card.
Circle stated: “The financial rail for the agentic economy is here.” This removes sign-up friction for agents operating across multiple autonomous workflows at once.
Real-World Testing and Supported Chains
Circle Nanopayments was recently tested through a collaboration with OpenMind, an open-source robotics software developer. An autonomous robot dog used the system to pay for its own recharging in USDC.
The robot initiated payment, received near-instant confirmation, and continued operating while settlement ran in the background. This shows early-stage agentic commerce functioning effectively in a real environment.
As of February 2026, the payment system operates on the testnets of 12 blockchain networks. These include Arbitrum, Base, Ethereum, Polygon PoS, Avalanche, Optimism, Sei, Sonic, Unichain, HyperEVM, Arc, and World Chain.
It works on any Gateway-supported EVM chain, giving developers broad flexibility. Developers can check the official documentation for the most current list of supported networks.
Use cases for this payment primitive cover pay-per-crawl search, real-time compute billing, and autonomous service marketplaces.
Each model depends on the ability to transfer fractions of a cent instantly and without gas fees. The system allows developers to build products around true sub-cent value exchange. Previously, such business models were not economically practical at this scale.
Developers can access the testnet now to build and test sub-cent payment flows in live conditions. The testnet phase gives builders time to validate applications before any mainnet deployment takes place.
Circle has positioned this as core payments infrastructure for agentic commerce. Each payment carries programmable value with no per-transaction gas cost required from the developer.
