Fastest free Sei RPC, live no-key EVM endpoint latency
HTTP round-trip latency for the `eth_getBlockByNumber(\"latest\", false)` method against every free, no-key public Sei EVM endpoint, audited every 60 seconds from 3 regions.
TL;DR. As of , Sei Labs leads rpc latency at 93 ms (p50, 24h) on Fastest free Sei RPC, live no-key EVM endpoint latency. Source: OpenChainBench, https://openchainbench.com/benchmarks/sei-rpc.
Companion page
Comparing free RPC endpoints across every chain we measure? Open the cross-chain RPC matrix →
Sei is a Cosmos SDK L1 (chain 1329) with a parallel-execution EVM layer bolted onto Tendermint consensus, launched by Sei Labs and positioned as a high-throughput trading chain. Standard EVM JSON-RPC on the EVM side; the Cosmos JSON-RPC would need a separate `Kind:"cosmos"` cluster entry as we did for Osmosis. 3 clean keyless providers measured: sei-official, Thirdweb, Stakeme. Excluded: dRPC (500 persistent internal error after 3 consecutive attempts), PublicNode (no `sei-evm` subdomain), Tenderly public (no `sei` route), BlockPI (`Apikey not found`), MeowRPC (defunct), AllThatNode + Basement Nodes + Node75 (host unresolvable or key-gated).
Methodology
Per-chain member of the RPC latency cluster, extended to Sei. We measure the round-trip latency of a single, identical JSON-RPC call (`eth_getBlockByNumber(\"latest\", false)`) against every no-key public Sei endpoint that sustains continuous probing, 3 providers, every 60 seconds, from us-east, eu-west and Singapore. The harness classifies every response (ok / http_err / jsonrpc_err / stale / timeout) with a Sei-scaled staleness gap (25 blocks at Sei's ~1 s block time). The cross-chain view lives on the parent `rpc-capabilities` benchmark; this page is the Sei-scoped answer with per-region breakdowns as a first-class dimension.
Frequently asked
What is the fastest free Sei RPC right now?
Sei Labs currently leads at 93 ms (`eth_getBlockByNumber("latest", false)` p50 over the last 24h), measured against 3 no-key providers probed every 60 seconds from us-east, eu-west and Singapore. The leaderboard re-sorts continuously against fresh Prometheus samples. Use the region tabs to see the leader from the origin closest to your deployment.
Which Sei RPCs work without an API key?
3 endpoints sustain continuous keyless probing: Sei Labs official, Thirdweb, and Stakeme. dRPC was removed after persistent 500 internal errors. Every listed endpoint was live-verified with a `eth_getBlockByNumber` POST returning a parsable response before inclusion.
Does the fastest Sei RPC change by region?
Often. Public infra concentrates in specific regions; a gateway that wins from Amsterdam can lose from Singapore by multiples. The region tabs at the top of the page re-scope every number to a single origin; pick the one closest to where your requests originate.
How is Sei RPC latency measured here, technically?
One identical `eth_getBlockByNumber("latest", false)` POST every 60 seconds against each provider from each of 3 regions, using the same plain HTTP client the rest of the RPC cluster uses. Wall-clock round-trip is recorded at millisecond precision; p50/p90/p99 are computed via Prometheus `quantile_over_time` over 24 hours. Responses are classified (`ok` / `http_err` / `jsonrpc_err` / `stale` / `timeout`) so an endpoint stuck on an old head or returning errors behind HTTP 200 is never ranked as fastest.
Source code github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities