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Circle Nanopayments Launches on Testnet to Power Gas-Free USDC Transfers for AI Agents

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Brian Armstrong's Bold Prediction: AI Agents Will Soon Dominate Global Financial

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.

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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.

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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.

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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.

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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.

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Crypto World

Pi Network’s PI Token Jumps Again a Day Before Key Update Implementation

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Pi Network (PI) Price on CoinGecko


The PI token exceeded $0.23 earlier today before it retraced slightly.

The updates recently implemented by the team, as well as the upcoming ones, continue to benefit Pi Network’s underlying asset, as PI is among the few alts in the green today.

Aside from the expected completion of protocol v20.2 upgrade by tomorrow, the Pi Network community is also anticipating Pi Day – March 14.

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Pi’s Upcoming Updates

The past several weeks have been quite eventful for Pi Network, especially in terms of upgrades and price movements. On February 21, the team announced that the protocol v19.6 migration was successfully completed, and the subsequent v19.9 iteration arrived on March 4.

They explained at the time that the v20.2 update was next in line, with initial deadline expectations set for March 14, which was later moved to March 12. Both of the already completed updates were followed by impressive price gains from PI, and it seems the hype about the upcoming upgrade has not disappointed so far.

Another factor that could be boosting the native token is the buildup to what became known as Pi Day, March 14, due to its symbolic resemblance to the mathematical constant π. As it happened last year, the community has hyped itself up, expecting some major announcements, perhaps a listing on a top-tier exchange such as Binance.

PI Defies Market Correction

As mentioned above, the protocol updates and perhaps anticipation for Pi Day have resulted in impressive gains for PI lately. The token is up by over 6% in the past day and sits just inches below $0.23. Moreover, it’s one of the best-performing crypto assets on a monthly scale, gaining 56%, and it’s up by 73% since its latest all-time low of $0.1312 marked on February 11.

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A few things to consider for its future price moves include the token unlock schedule, as over 13.5 million coins will be unlocked in three consecutive days starting today, and the number will jump to 17 million on March 17. Additionally, PI has a history of performing well in the weeks leading up to big announcements or updates, only to crash hard after in a classic sell-the-news event.

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Pi Network (PI) Price on CoinGecko
Pi Network (PI) Price on CoinGecko

 

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Babylon, Ledger Integration Expands Bitcoin Vault Access

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Babylon, Ledger Integration Expands Bitcoin Vault Access

Bitcoin staking infrastructure developer Babylon Labs has integrated with Ledger, a cryptocurrency hardware wallet maker, in a move that could make it easier for holders to put their Bitcoin (BTC) to work in financial applications without giving up self-custody.

In a Tuesday announcement, the companies said Ledger signers will be used for Babylon’s Trustless Bitcoin Vaults, also known as BTCVaults. The vaults allow BTC holders to lock their tokens into programmable contracts governed by onchain conditions while retaining self-custody of the underlying asset.

Ledger devices will act as the secure signing layer for BTCVault transactions, enabling users to authorize vault interactions directly from their hardware wallet.

The feature relies on Ledger’s Clear Signing technology, which displays human-readable transaction details on the device screen so users can verify exactly what they are approving before signing. The approach is designed to reduce the risk of signing malicious or opaque transactions, a common concern in crypto workflows.

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The tie-up is significant given Ledger’s scale as a hardware wallet provider, with the company reporting more than 8 million devices sold globally. As Cointelegraph recently reported, Ledger is said to be in talks with major financial institutions about a US initial public offering. 

One estimate of the projected size and growth rate of the crypto hardware wallet market. Source: Mordor Intelligence

Related: Ledger and Trezor 2025 hardware wallets released: What’s new for users?

Digital asset vaults growth surges

Self-custodial vaults are emerging as a growing use case in digital assets as users look for ways to put their crypto to work without relinquishing control of their funds. 

Unlike traditional custodial platforms, where assets are deposited with an exchange or intermediary, vaults are typically governed by programmable conditions that allow users to retain ownership while participating in lending, staking or yield strategies.

Vault strategies have gained traction in decentralized finance. Protocols such as Yearn Finance popularized the concept through automated yield vaults that allocate user deposits across lending and liquidity markets. 

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More recently, messaging platform Telegram introduced vault-style yield products within its integrated crypto wallet, allowing users to deposit assets such as Bitcoin, Ether (ETH) and Tether’s USDt (USDT) into structured strategies designed to generate returns.

Institutional players are also joining the fray. Asset manager Bitwise recently collaborated with DeFi lending protocol Morpho to curate onchain vault strategies designed to generate yield through overcollateralized lending markets.

Related: Bitcoin company Fold pays off $66M debt, frees up BTC collateral