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The ARC Network testnet RPC endpoint is https://rpc.testnet.arc.io and its chain ID is 5042002, with USDC as the native gas token. The full testnet config and EVM wallet setup are below. ARC mainnet is expected in September 2026, when AlgoVoi’s Arc settlement goes live. Only ARC Testnet is available today, so every value on this page is a testnet value.
Arc is AlgoVoi’s eighth chain, settling from September 2026. Arc mainnet is not open yet (testnet only today), so AlgoVoi settles live payments on its seven live mainnet chains for now (see Chains overview). AlgoVoi’s Arc settlement, finality verification and recurring-pull support are built in and ship in the Payment Rails bundle now; they activate when Arc mainnet opens, expected September 2026. Until then, the ARC Testnet verifier (chain ID 5042002) is available for development and interop testing.

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ARC Testnet RPC endpoint and chain ID

ARC is purpose-built for programmable money. USDC is the native gas token — you pay transaction fees in USDC, not in a separate ETH-like asset. This eliminates the dual-token gas problem common on other chains.

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ARC mainnet status

ARC mainnet is expected in September 2026, when AlgoVoi’s Arc settlement activates. As of 2026-08 Circle has not yet published the public ARC mainnet RPC endpoint (AlgoVoi targets chain ID 5042). The ARC Network docs confirm that “the values on this page apply to the Arc Testnet” and that “mainnet endpoints and parameters are published separately when available.” ARC Testnet (chain ID 5042002, RPC https://rpc.testnet.arc.io) is the only network available today. Use the testnet values above for all development, and check the ARC Network docs for mainnet launch announcements.

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Amount-only binding

ARC is EVM-compatible. Like Base and Tempo, ERC-20 transfers carry no memo field, so AlgoVoi binds checkouts by amount uniqueness. Send the exact amount_microunits from the checkout response and do not round.

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USDC decimals — important

On-chain ARC USDC uses 18 decimal places (unlike 6 dp on every other chain). AlgoVoi’s verifier handles this scaling automatically — amounts in the API and checkout response are always in the standard 6 dp micro-unit format. You never need to scale yourself.

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Wallets

Any EVM wallet works, configured for ARC Testnet:
  • AlgoVoi Chrome extension (in-house wallet, native x402 / MPP / AP2 on ARC via viem signTransaction + native value transfer — Arc’s native gas token is USDC; six-chain coverage as of v2.6.0)
  • MetaMask — add network manually (chain ID 5042002, RPC https://rpc.testnet.arc.io)
  • Rabby
  • WalletConnect
Fund testnet wallets at faucet.circle.com — select ARC Testnet.

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ERC-8004 onchain agent identity

ARC defines ERC-8004, a standard for registering AI agents as onchain identities with reputation and credential verification. AlgoVoi is registered on ARC Testnet as an ERC-8004 agent: This makes AlgoVoi discoverable as a payment agent within ARC’s agentic economy — any resolver that reads the ERC-721 tokenURI finds our A2A endpoint, compliance attestation, and supported chain list.

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ERC-8183 job settlement (Tier 3)

ARC also defines ERC-8183 for USDC-escrow job settlement between agents. AlgoVoi plans to support ERC-8183 job settlement in a future release, enabling agent-to-agent payment flows with onchain escrow and conditional release.

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Agentic protocols

ARC Testnet is fully supported by AlgoVoi’s protocol stack:

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See also