Skip to main contentBlast Sepolia RPC
Use Uniblock’s JSON-RPC endpoint to access Blast Sepolia with low-latency routing and a single API surface across providers.
What is Blast Sepolia?
Blast Sepolia is an EVM-compatible testnet. It is a testnet for BLAST.
What is the Blast Sepolia 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=168587773. Include the JSON-RPC method and params in the request body.
Supported networks
| Network | Type | Chain ID |
|---|
| BLAST | Mainnet | 81457 |
| Blast Sepolia | Testnet | 168587773 |
| Blast Testnet | Testnet | 23888 |
API reference
Browse the available method groups for this chain:
