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Optimism Sepolia TestnetService

op-sepolia-testnet

OP Sepolia testnet JSON-RPC (chain id 11155420). OP Stack L2 on Ethereum Sepolia.

Active Suppliers
276
of 276 ever configured
Service Info
Service ID
op-sepolia-testnet
Compute Units / Relay
1,847
Owner
pokt1l…sl9s
Active Applications
2
Relay Mining EMA
5,399 relays
Service Metadata Cardsource: on-chain metadata (LCD)
{10 items
"schema":"pocket-service-card/v1"
"description":"OP Sepolia testnet JSON-RPC (chain id 11155420). OP Stack L2 on Ethereum Sepolia."
"rpc_types":[2 items
0:{3 items
"type":"JSON_RPC"
"intent":"expected"
"backend_hint":"execution client HTTP RPC, default :8545"
}
1:{4 items
"type":"WEBSOCKET"
"intent":"optional"
"backend_hint":"execution client WS RPC, default :8546"
"notes":"eth_subscribe (newHeads, logs)"
}
]
"apis":[2 items
0:"ethereum-json-rpc"
1:"eth-subscribe"
]
"specs":[1 item
0:{3 items
"kind":"openrpc"
"api":"ethereum-json-rpc"
"url":"https://raw.githubusercontent.com/ethereum/execution-apis/assembled-spec/openrpc.json"
}
]
"access":"public"
"results":"deterministic"
"serving":{7 items
"backend":"OP Stack execution client (op-geth or op-reth) with op-node connected to an Sepolia L1 endpoint."
"implementations":[2 items
0:"op-geth + op-node >= 1.9"
1:"op-reth >= 1.0"
]
"docs":"https://docs.optimism.io/operators/node-operators/rollup-node"
"sync":"full"
"min_disk_gb":500
"healthcheck":[3 items
0:{3 items
"rpc_type":"JSON_RPC"
"request":{4 items
"jsonrpc":"2.0"
"id":1
"method":"eth_chainId"
"params":[]0 items
}
"expect":{2 items
"json_path":"$.result"
"matches":"^0xaa37dc$"
}
}
1:{3 items
"rpc_type":"JSON_RPC"
"request":{4 items
"jsonrpc":"2.0"
"id":2
"method":"eth_syncing"
"params":[]0 items
}
"expect":{2 items
"json_path":"$.result"
"matches":"^false$"
}
}
2:{4 items
"rpc_type":"WEBSOCKET"
"request":{4 items
"jsonrpc":"2.0"
"id":4
"method":"eth_blockNumber"
"params":[]0 items
}
"expect":{2 items
"json_path":"$.result"
"matches":"^0x[0-9a-f]+$"
}
"notes":"Sends a request over the socket rather than only opening it: a handshake alone proves nothing."
}
]
"notes":"Testnet."
}
"docs":"https://docs.optimism.io/"
"updated":"2026-09-03"
}