Sei Archive Node RPC

Query the full history of Sei — balances, contract storage, and transaction traces at any past block — with archive node access included on every paid SwiftNodes plan. No separate archive tier, no per-request fees.

Endpoint

https://rpc.swiftnodes.io/rpc/sei?key=YOUR_API_KEY

Archive queries use the same Sei HTTP endpoint — just pass a historical block tag. The matching WebSocket endpoint is wss://rpc.swiftnodes.io/ws/sei?key=YOUR_API_KEY.

Query historical Sei state

// Read historical state at a past block on Sei (archive query)
const balanceAtBlock = await client.getBalance({
  address: "0x0000000000000000000000000000000000000000",
  blockNumber: 1_000_000n,
});

// Replay a transaction's execution trace (requires archive data)
const trace = await fetch("https://rpc.swiftnodes.io/rpc/sei?key=YOUR_API_KEY", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    jsonrpc: "2.0", id: 1,
    method: "debug_traceTransaction",
    params: ["0x<txhash>", { tracer: "callTracer" }],
  }),
}).then((r) => r.json());

What archive access unlocks

• eth_getBalance / eth_call at any historical block number
• eth_getStorageAt for contract storage at a past block
• debug_traceTransaction to replay and inspect old transactions
• Point-in-time analytics, accounting, and reconciliation

Sei is a Layer 1 (parallelized EVM, CometBFT PoS), with ~~400 milliseconds block times and instant single-block finality (bft, twin turbo consensus) finality. Historical queries reach back across its entire chain history.

Frequently asked questions

See the full Sei RPC page for chain details, or the API reference for the complete method list.