Fastest free Sei RPC, live no-key EVM endpoint latency
Sei Labs leads rpc latency at 85 ms (p50, 24h) on 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 85 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. Excluded by the launch audit: 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). The 2026-07-03 sweep had originally excluded Sei because dRPC cached `eth_blockNumber`; the re-audit on 2026-07-26 confirms dRPC no longer caches and Thirdweb + Stakeme have come online, restoring 4 clean keyless providers. Every listed provider live-verified with 4 consecutive keyless probes at re-launch.
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, 4 providers at launch, 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 85 ms (`eth_getBlockByNumber("latest", false)` p50 over the last 24h), measured against 4 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?
4 endpoints sustain continuous keyless probing at launch. Every listed endpoint was live-verified with a `eth_getBlockByNumber` POST returning a parsable response before inclusion. See the methodology section for the endpoints that were audited and excluded.
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