net_peerCount

net_peerCount returns the number of peers currently connected to an OP Mainnet node — the OP Stack rollup that settles to Ethereum L1 and uses ETH for gas — as a hex-encoded integer (for example "0x1a" for 26 peers). It is a quick way to gauge how well a node is wired into the network's gossip layer for block and transaction propagation. Send the request to https://optimism.therpc.io/YOUR_API_KEY (chain ID 10, 0xa) and decode the hex value to a decimal count.

Use cases

• Track peer counts across your OP Mainnet nodes in an infrastructure health dashboard to spot connectivity dips early.
• Detect an isolated node with few or zero peers that risks falling behind the ~2-second block cadence and serving stale data.

Parameters

此方法不需要任何参数，传入空数组 [] 即可。

Response

Example request

1curl https://optimism.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "net_peerCount",
7    "params": [],
8    "id": 1
9  }'

Try it live in the Optimism playground.

Errors & troubleshooting

Common pitfalls

• A managed endpoint such as optimism.therpc.io returns the peer count of whichever backend node serves the request, not a figure tied to your account or session.
• A low peer count on a managed OP Mainnet node does not necessarily mean your RPC calls are degraded — the provider load-balances across healthy nodes, so judge service quality by sync status and response latency instead.

Supported networks

• Mainnet — Chain ID: 10
• Sepolia — Chain ID: 11155420

See also

• net_listening
• net_version

1curl https://optimism.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"net_peerCount","params":[]}'