Documentation Index
Fetch the complete documentation index at: https://docs.arc.io/llms.txt
Use this file to discover all available pages before exploring further.
Arc exposes standard Ethereum JSON-RPC endpoints — the same HTTP and WebSocket
API that Ethereum nodes use — for submitting transactions, querying state, and
subscribing to events. Connect through Circle’s primary endpoint or through a
third-party node provider. For details on Arc’s current
network phase, see Deployment model.
Testnet endpoints
| Provider | HTTP | WebSocket |
|---|
| Primary (Circle) | https://rpc.testnet.arc.network | wss://rpc.testnet.arc.network |
| Blockdaemon | https://rpc.blockdaemon.testnet.arc.network | — |
| dRPC | https://rpc.drpc.testnet.arc.network | wss://rpc.drpc.testnet.arc.network |
| QuickNode | https://rpc.quicknode.testnet.arc.network | wss://rpc.quicknode.testnet.arc.network |
Network parameters
These parameters identify the Arc Testnet on the Ethereum network and are
required when adding Arc to a wallet or development framework.
| Parameter | Value |
|---|
| Chain ID | 5042002 |
| Currency symbol | USDC |
| Block explorer | testnet.arcscan.app |
| Gas tracker | testnet.arcscan.app/gas-tracker |
| Faucet | faucet.circle.com |
Node providers
The following infrastructure partners offer managed RPC access to Arc. Each
provider supports HTTP endpoints, and most support WebSocket connections. See
Node providers for additional details.
| Provider | Description |
|---|
| Alchemy | Developer platform with enhanced APIs, monitoring, and debugging tools |
| Blockdaemon | Institutional-grade node infrastructure with secure, compliant access |
| dRPC | Decentralized RPC aggregator with load-balanced, multi-provider routing |
| QuickNode | High-performance global endpoints and blockchain APIs |
Supported methods
Arc supports all standard Ethereum JSON-RPC methods. The table below lists
commonly used methods by category.
| Category | Methods | Notes |
|---|
| State | eth_getBalance, eth_getCode, eth_getStorageAt, eth_call | |
| Transactions | eth_sendRawTransaction, eth_getTransactionReceipt, eth_getTransactionByHash | |
| Blocks | eth_getBlockByNumber, eth_getBlockByHash, eth_blockNumber | |
| Gas | eth_gasPrice, eth_estimateGas, eth_feeHistory | |
| Subscriptions | eth_subscribe, eth_unsubscribe | WebSocket only |
maxFeePerGas, see
Gas and fees.
The values on this page apply to the Arc Testnet. Mainnet endpoints and
parameters are published separately when available.
Troubleshooting
| Symptom | Cause | Resolution |
|---|
connection refused or timeout | Incorrect RPC URL or network issue | Verify you are using a URL from the testnet endpoints table. Try an alternate provider. |
invalid chain id | Wallet or provider configured with the wrong Chain ID | Set the Chain ID to 5042002. |
insufficient funds | Account has no USDC for gas | Request testnet USDC from the faucet. |
