Skip to main contentOptimism RPC
Use Uniblock’s JSON-RPC endpoint to access Optimism with low-latency routing and a single API surface across providers.
What is Optimism?
Optimism is an EVM-compatible mainnet.
What is the Optimism 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=10. Include the JSON-RPC method and params in the request body.
Supported networks
| Network | Type | Chain ID |
|---|
| Optimism | Mainnet | 10 |
| Optimism Sepolia | Testnet | 11155420 |
API reference
Browse the available method groups for this chain:
