Free Sei RPC Endpoint
Chain ID 1329 · SEI · multi-region with automatic failover
Sei (Chain ID 1329) is a parallelized EVM L1 with ~400 ms blocks and near-instant finality — one of the fastest EVM chains in production. NodeFlare runs a dedicated Sei node in Asia.
Public endpoint — no API key
HTTPS
https://rpc.nodeflare.app/sei/publicNeed higher limits? Use a keyed endpoint https://rpc.nodeflare.app/sei/v1/{YOUR_KEY} — get a free key →
Connect to Sei
curl -s -X POST https://rpc.nodeflare.app/sei/public \
-H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","id":1,"method":"eth_blockNumber","params":[]}'import { ethers } from "ethers";
const provider = new ethers.JsonRpcProvider(
"https://rpc.nodeflare.app/sei/public"
);
const block = await provider.getBlockNumber();import { createPublicClient, http } from "viem";
const client = createPublicClient({
transport: http("https://rpc.nodeflare.app/sei/public"),
});
const block = await client.getBlockNumber();from web3 import Web3
w3 = Web3(Web3.HTTPProvider(
"https://rpc.nodeflare.app/sei/public"
))
print(w3.eth.block_number)Add Sei to your wallet
Network details for MetaMask, Rabby, or any EVM wallet — Sei chain ID 1329 (0x531).
| Network name | Sei |
| RPC URL | https://rpc.nodeflare.app/sei/public |
| Chain ID | 1329 |
| Currency symbol | SEI |
| Block explorer | https://seitrace.com |
Built for Sei
Trading apps, order-book DeFi, and latency-critical workloads on Sei. Every request routes to the nearest healthy node, with automatic failover and no per-request throttling — the gaps public endpoints leave.
Dedicated Sei RPC node — your own path, not a shared pool
NodeFlare runs its own dedicated Sei node on bare-metal — not a reseller of Alchemy or Infura, and not a shared free-for-all pool. A free or paid key gives you a dedicated endpoint path with your own rate limits, no per-request throttling, and full access to heavy methods (eth_getLogs, trace_*, debug_*) — your own Sei RPC without running the node yourself.
Sei RPC — FAQ
What is Sei's chain ID?
Sei's chain ID is 1329 (hex 0x531). Its native currency is SEI and its block explorer is seitrace.com. You can connect with NodeFlare's free public RPC at https://rpc.nodeflare.app/sei/public — no API key required.
How do I add Sei to MetaMask?
In MetaMask, open the network menu → "Add a network" → "Add a network manually", then enter — Network name: Sei; New RPC URL: https://rpc.nodeflare.app/sei/public; Chain ID: 1329; Currency symbol: SEI; Block explorer URL: https://seitrace.com. Save, then switch to Sei. The endpoint is free and needs no account.
What is the Sei RPC URL?
NodeFlare's public Sei RPC URL is https://rpc.nodeflare.app/sei/public over HTTPS. No API key is required for the public endpoint.
Is the Sei RPC free?
Yes. The public Sei endpoint is free with no sign-up. A free API key unlocks higher rate limits, heavy methods, and a dedicated path — 2,000,000 compute units per month, no credit card.
What are the Sei RPC rate limits?
The public endpoint is limited to 2 requests/second per IP. A free key gives 10 requests/second; paid plans scale to 500 req/s. Every plan includes all 23 supported chains.
Is NodeFlare a good Sei RPC provider?
NodeFlare is an independent Sei RPC provider that runs its own nodes — not a reseller or aggregator of third-party backends. The public endpoint is free with no sign-up; a free API key adds higher rate limits, and heavy methods (eth_getLogs, trace_*, debug_*) — 2,000,000 compute units per month, no credit card.
Is there a dedicated Sei RPC node?
Yes. NodeFlare runs its own dedicated Sei node(s), and every request is routed to the nearest healthy node with automatic failover. A free or paid key gives you a dedicated endpoint path with your own rate limits and full access to archive methods like eth_getLogs and debug_traceTransaction.
Go deeper
- Full Sei API reference → — supported methods, WebSocket, regions
- Rate limits & compute-unit costs → — what each method costs against your quota
- Pay per request with x402 → — Sei calls in USDC from $0.001, no account:
POST /sei/x402 - RPC for trading bots → and indexers → — low-latency, eth_getLogs-heavy workloads
- Screen a Sei token for scams → — ownership, honeypot check, holder concentration → one risk score
- Onchain tools for AI agents → — token-safety, wallet intelligence and RPC over MCP / x402
Build on Sei with a free key
Higher limits, a dedicated path, and automatic failover — every chain included. No credit card.
Get your free API key →Sei RPC methods
Per-method docs for Sei — parameters, compute-unit cost, and copy-paste examples.