Arc went live on mainnet September 16, 2026 with eleven institutional founding validators already committed. The RPC layer underneath is what determines whether regulated builders can actually ship on day one. Arc is the EVM-compatible layer 1 built by Circle, the issuer of USDC, purpose-designed for stablecoin-native finance — payments, FX, treasury operations, tokenized assets, and capital-markets settlement. It ran as a public testnet from October 2025, with institutional participants including BlackRock, Visa, HSBC, Goldman Sachs, and Mastercard testing integrations ahead of launch. Mainnet opened September 16, 2026 with eleven founding validators — BlackRock, DTCC, Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, and Visa — alongside Circle. Unlike most L1s that launch hunting for a use case, Arc shipped with a defined mandate: banks, payment networks, and licensed fintechs settling stablecoin-denominated payments, FX, and tokenized assets on-chain. That mandate changes what the underlying infrastructure has to deliver. Retail-optimized RPC infrastructure — the kind that ships with rate limits, best-effort uptime, and no archive access — cannot support workloads where a dropped call leaves a settlement half-recorded and a compliance check unverifiable. Cheap or unproven infrastructure at this scale costs more than it saves. What Arc workloads actually need from RPC Before selecting a provider, teams building on Arc should evaluate four criteria that separate infrastructure that fits regulated stablecoin-finance workloads from the rest. Deterministic latency that matches the chain’s own finality. Arc pairs Reth, which runs transactions, with Malachite, a consensus system that finalizes blocks in about half a second. Once enough validators agree on a block, it’s final — it doesn’t get reorganized or reversed later. That speed only helps if the RPC layer keeps up with it: submitting a transaction and confirming its status needs to happen in that same half-second window, or Arc’s speed advantage gets lost further up the stack. For payment and FX applications coordinating settlement windows, how fast your endpoint responds — not how much you pay in fees — becomes the practical bottleneck. Archive and tracing access from day one. Custodians and payment processors settling USDC-denominated transactions need continuous access to historical balance and transaction data — not for user experience, but for the audit trail their regulator will request quarterly. If archive access is missing or unreliable, positions at prior blocks cannot be reconstructed, the audit becomes a manual reconciliation exercise, and the license goes on review. The same constraint hits any bank running compliance checks on tokenized-asset transfers. Data sovereignty options. A significant portion of Arc’s stablecoin-finance infrastructure will be built by regulated banks, payment networks, and licensed institutions who cannot place customer-linked transaction data on third-party infrastructure at all, regardless of the provider’s SOC 2 or ISO 27001 certifications. That requirement rules out most RPC providers immediately — the exception is teams offering a self-hosted deployment path where nodes run inside the customer’s own environment. Compliance-grade attestations. SOC 2 Type II and ISO 27001 are no longer premium features for institutional infrastructure — they are baseline requirements for vendor risk review at any regulated buyer, and Arc’s founding validator list is made up almost entirely of exactly that kind of buyer. How Chainstack supports Arc across three deployment models Chainstack supports Arc on both mainnet and testnet, with full debugging and tracing tools built in and out-of-the-box compatibility with popular developer libraries like ethers.js, viem, and web3.py. Chainstack added Arc testnet support in July 2026 and extended it to mainnet at launch. It is currently the only infrastructure provider offering managed, dedicated, and self-hosted deployment on Arc from a single control plane, holds both SOC 2 Type II and ISO 27001 certifications, and serves 100,000+ developers across 70+ blockchain networks — including every network Arc builders are likely to bridge to or settle against. Chainstack offers Arc support across three deployment models depending on the workload’s operational profile: Global Nodes Dedicated Nodes Chainstack Self-Hosted Infrastructure Elastic, load-balanced Isolated node instance Customer’s own cloud, on-prem, or bare metal Requests Metered (request units) No per-request billing Unlimited Uptime 99.99% 99.99% Customer-managed Throughput 25–600 RPS (plan-dependent) Limit-free by nature Customer’s hardware limit Which deployment fits which workload Global Nodes — geo-balanced, auto-scaling RPC endpoints with 99.99% uptime SLA. The same infrastructure powers production wallets, consumer-facing payment apps, and fintech integrations where variable load and fast time-to-market matter more than dedicated single-tenant guarantees. Dedicated Nodes — isolated high-performance instances with no per-request billing, full node configuration control, and full debugging and tracing tools. The operational profile trading desks, FX and treasury systems, and high-throughput indexers depend on when deterministic performance under load is the binding constraint. Chainstack Self-Hosted — a system for running Arc’s Reth and Malachite infrastructure inside the customer’s own cloud, on-premises environment, or bare metal, with Chainstack handling deployment, monitoring, updates, and recovery. New nodes start from a snapshot, so they come online fast instead of re-downloading the entire chain history. The deployment model banks, payment networks, and regulated institutions reach for when customer-linked transaction data cannot leave their environment. Testnet USDC remains available through Circle’s own faucet for teams still evaluating the network on testnet. The platform also ships a Model Context Protocol (MCP) server that lets developers query Arc data and provision nodes directly from Claude, Cursor, Windsurf, ChatGPT, Codex, and Gemini — reducing time between prompt and production endpoint to a single natural-language exchange. Final thoughts Chainstack’s combination of testnet-through-mainnet Arc support, three deployment models including self-hosted, and dual SOC 2 Type II and ISO 27001 attestations makes it a complete choice for teams building production stablecoin-finance workloads in 2026. For banks, payment networks, and licensed institutions who cannot afford to gamble on infrastructure that ships without archive data, without tracing, without a self-hosted option, or without the compliance attestations their regulator will ask about — Chainstack Self-Hosted and the platform’s dedicated Arc product line offer the closest match to what stablecoin-native finance actually needs from its infrastructure layer. The post How to choose the right RPC provider for Arc? appeared first on Blockonomi.
