Sources
Every claim and data surface this site cites, so nobody has to take our word for it.
Synthra V3
Live trend — no single date
Observed live in the latest scan across 1 source(s).
Wave evidence — Synthra V3
Claims
- Arc denominates every transaction fee in USDC, which is the chain's native gas token.
“Arc denominates all transaction fees in USDC, the native gas token.”
· source - Arc's gas price is not fixed: the fee market is EIP-1559 with exponentially weighted moving average smoothing.
“The fee market uses an EIP-1559 pricing model combined with exponentially weighted moving average (EWMA) smoothing.”
· source - Arc's base fee floor is designed around roughly one tenth of a US cent per ERC-20 transfer.
“$0.001 per ERC-20 transfer”
· source - Arc gives deterministic finality in under one second with no reorganization risk.
“Deterministic finality in under one second, with no reorganization risk”
· source - On Arc, fees are paid in USDC and no volatile native token is required.
“Fees are paid in USDC, with no volatile native token required.”
· source - Circle announced Arc's public mainnet launch on 16 September 2026.
“an open Layer 1 blockchain purpose-built for financial markets, real-world money movement, and agentic economic activity”
· source - ERC-8183 'Agentic Commerce' specifies job escrow with evaluator attestation.
“Job escrow with evaluator attestation for agent commerce.”
· source - In ERC-8183 the Completed state is terminal and releases the escrow to the provider.
“Completed; terminal, escrow released”
· source - ERC-8004's Reputation Registry is a standard interface for posting and fetching feedback signals.
“A standard interface for posting and fetching feedback signals.”
· source - ERC-8004's Identity Registry is an ERC-721-based handle resolving to a registration file.
“A minimal on-chain handle based on ERC-721 with URIStorage extension that resolves to an agent's registration file”
· source - Arc's own documentation presents ERC-8183 as defining the full job lifecycle through to USDC settlement.
“The ERC-8183 standard defines the full job lifecycle: creation, escrow funding, deliverable submission, evaluation, and USDC settlement.”
· source - Arc's documentation presents ERC-8004 as a native registry for identity, reputation events and credential verification.
“The ERC-8004 standard provides a native registry for agent identity, reputation events, and credential verification.”
· source - Arc's ERC-8183 job tutorial runs against Arc Testnet, not Arc mainnet.
“the ERC-8183 job lifecycle on Arc Testnet”
· source - The ERC-8004 IdentityRegistry address Arc's tutorial uses, 0x8004A818BFB912233c491871b3d84c89A494BD9e, is a testnet deployment in the ERC-8004 team's own deployment table.
“0x8004A818BFB912233c491871b3d84c89A494BD9e”
· source - Circle's x402 facilitator is reported to already serve Arc mainnet (eip155:5042).
“Circle's facilitator already serves it.”
· source - No facilitator settles plain EIP-3009 on Arc mainnet, because on a chain where gas is the payment asset the facilitator has nothing to sponsor.
“no facilitator settles plain EIP-3009 on Arc mainnet”
· source - A single EIP-3009 USDC payment on Arc mainnet was measured at 112,519 gas, costing 0.00226 USDC.
“measured on mainnet (112,519 gas)”
· source - On Arc, USDC presents 18 decimals as the gas token and 6 decimals through its ERC-20 interface, over one balance.
“USDC is 18 decimals as the gas token and 6 through the ERC-20 interface.”
· source - Every USDC payment on Arc emits two Transfer events, one from the predeploy and a native-balance mirror from a system address.
“One from the USDC predeploy (6 decimals) and a native-balance mirror from the system address”
· source - Arc's own docs describe USDC as having two interfaces over one balance, native 18-decimal and ERC-20 6-decimal, with no wrapper needed.
“USDC on Arc has two interfaces that share one balance: a native interface (18 decimals) and an ERC-20 interface (6 decimals), so no WETH-style wrapper is needed.”
· source - Any transaction sent to Arc must set maxFeePerGas to at least 20 Gwei.
“to at least 20 Gwei before submitting any transaction to Arc”
· source - Arc mainnet exposes a public JSON-RPC endpoint at https://rpc.mainnet.arc.io.
“https://rpc.mainnet.arc.io”
· source - Arc supports ERC-4337, so any compatible bundler or paymaster can sponsor a user's gas.
“Arc supports the ERC-4337 standard, so you can use any compatible bundler, paymaster, or SDK from the providers below.”
· source - Circle Gateway's GatewayWallet is deployed on Arc mainnet at 0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE.
“0x77777777Dcc4d5A8B6E418Fd04D8997ef11000eE”
· source - Circle Gateway makes payments gas-free by collecting offchain authorizations and settling net positions in bulk onchain.
“Gateway collects authorizations and settles net positions in bulk onchain”
· source - When Nanopayments went live on mainnet in April 2026 its supported-chain list did not include Arc.
“Arbitrum, Avalanche, Base, Ethereum, HyperEVM, Optimism, Polygon PoS, Sei, Sonic, Unichain, and World Chain.”
· source - Bountycaster bounties are settled peer to peer between the parties, with no escrow held by the platform.
“Funds are paid peer to peer. Payment details can be discussed between parties.”
· source - On Bountycaster, marking a bounty complete builds the participant's public reputation and sets price references for other posters.
“Builds your reputation and provides pricing references for other posters”
· source - A live micro-job marketplace pays humans per small task and lets job creators require a minimum reputation score to take a job.
“Micro-job marketplace on Solana where AI agents and businesses hire humans for micro-jobs, feedback, community and social campaigns.”
· source - A shipped onchain task marketplace offers a claim mode where the worker locks the task to themselves before starting.
“you claim the task first (locks it to you), then complete it”
· source - That same marketplace locks the USDC onchain at posting time rather than relying on the poster to pay afterwards.
“funds are locked onchain when a task is posted”
· source - An existing Arc task board escrows the reward in native USDC and has any party other than the creator submit a proof URL.
“a creator escrows the reward in native USDC; any agent or human except the creator submits a proof URL”
· source - That task board states it is live on Arc mainnet.
“Live on Arc mainnet”
· source - A commercial crypto freelance platform operates non-custodially, never holding or releasing project funds.
“Datronis does not hold, custody, or release project funds.”
· source - Synthra V3 is a spot DEX listed on Arc only; its factory exists on Robinhood Chain but has created no pools there.
“Synthra V3 spot dex, listed on Arc only (the same factory is deployed on Robinhood Chain but has created no pools yet).”
· source - Synthra V3's first block with real spot activity on Arc is 2026-09-16, i.e. it went live with the chain.
“start dates are the first block with real Trade/FeeSplit or PoolCreated activity (2026-09-14 for the launchpad, 2026-09-16 for V3 spot)”
· source - Blockscout is Arc mainnet's official block explorer and has covered the chain since day one.
“Arc mainnet is live, and Blockscout is its official block explorer, powering the chain from day one.”
· source - Circle's x402 service-discovery endpoint can be called with no API key and no account.
“No API key, no auth, no Circle account. You can run this right now”
· source - Circle's Agent Marketplace is a curated catalogue where paying parties discover USDC-priced services.
“A curated, compliance-first service catalog where AI agents can discover and pay for USDC-priced services.”
· source - Uniswap's UniswapX playbook records contracts deployed on Arc, including V3DutchOrderReactor at 0x0000000015134054eA82AE0bb9fda66b36402C36.
“0x0000000015134054eA82AE0bb9fda66b36402C36”
· source - Arc's Memo mechanism attaches structured context to an existing contract call, including a USDC call, without modifying it.
“Transaction memos let businesses and developers attach structured context to individual contract calls without modifying them, including existing contracts like USDC.”
· source - Arc's contract-address reference lists the Memo predeploy at 0x5294E9927c3306DcBaDb03fe70b92e01cCede505 for mainnet and testnet.
“0x5294E9927c3306DcBaDb03fe70b92e01cCede505”
· source - Under ERC-8004, an actor cannot record reputation for itself; a separate observer must write the feedback.
“agent owners cannot record reputation for their own agents to prevent self-dealing”
· source - Arc's MCP server exposes documentation search and page retrieval only, not chain or job data.
“finds relevant documentation snippets based on a query”
· source - x402 is blockchain-agnostic across EVM chains and Solana, with stablecoins as the primary use case.
“x402 is blockchain-agnostic and supports all EVM-compatible chains, Solana, and more.”
· source - Arc's USDC predeploy at 0x3600...0000 answers EIP-3009 calls (DOMAIN_SEPARATOR and authorizationState) on mainnet, so a poster's offchain signature can be redeemed by the worker.
“USDC predeploy 0x3600…0000”
· source - The Arc Blockscout REST API returns a poster's ERC-20 transfer history without an API key.
“REST API methods are used to render the UI for new versions of Blockscout”
· source - Neither the ERC-8004 registries nor the ERC-8183 AgenticCommerce reference contract have code deployed at their known addresses on Arc mainnet.
“0x8004B663056A597Dffe9eCcC1965A193B7388713”
· source