Skip to main contentArbitrum RPC
Use Uniblock’s JSON-RPC endpoint to access Arbitrum with low-latency routing and a single API surface across providers.
What is Arbitrum?
Arbitrum is an EVM-compatible mainnet.
What is the Arbitrum JSON-RPC API?
The JSON-RPC API is the standard interface for reading chain state, sending transactions, and interacting with smart contracts where supported.
Making API requests
Send a POST request to https://api.uniblock.dev/uni/v1/json-rpc?chainId=42161. Include the JSON-RPC method and params in the request body.
Supported networks
| Network | Type | Chain ID |
|---|
| Arbitrum | Mainnet | 42161 |
| Arbitrum Sepolia | Testnet | 421614 |
API reference
Browse the available method groups for this chain:
