Fastest free ICON RPC, live no-key endpoint latency
HTTP round-trip latency for icx_getLastBlock queries against every available public ICON blockchain endpoint, audited every 60 seconds from 3 regions.
TL;DR. As of , ICON Foundation posts the lowest rpc latency at 13 ms (p50, 24h) on Fastest free ICON RPC, live no-key endpoint latency. Source: OpenChainBench, https://openchainbench.com/benchmarks/icon-rpc.
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Comparing free RPC endpoints across every chain we measure? Open the cross-chain RPC matrix →
ICON is a South Korean L1 blockchain focused on interoperability and enterprise adoption, using a Delegated Proof of Contribution (DPoC) consensus with roughly 2-second block finality. ICON nodes expose a JSON-RPC 2.0 API: POST /api/v3 with method icx_getLastBlock returns the latest block height as a decimal integer. Free public endpoints are available keyless from the ICON Foundation (ctz.solidwallet.io), ICON Community (api.icon.community), and iconblockchain.xyz. Every provider was live-verified with consecutive block-height probes at launch.
Methodology
Per-chain member of the RPC latency cluster, extended to ICON (ICX). We measure the round-trip latency of a JSON-RPC icx_getLastBlock call against every available public ICON endpoint that sustains continuous probing: 3 providers at launch, every 60 seconds, from us-east, eu-west and Singapore. Each provider is probed via a POST /api/v3 request from which the block height is extracted from result.height. The harness classifies every response (ok / http_err / jsonrpc_err / stale / timeout) with an ICON-scaled staleness gap (150 blocks, around 5 min at 2 s/block). The cross-chain view lives on the parent rpc-capabilities benchmark; this page is the ICON-scoped answer with per-region breakdowns as a first-class dimension.
Frequently asked
What is the fastest free ICON RPC right now?
ICON Foundation currently leads at 13 ms (ICON block height p50 over the last 24h), measured against 3 providers probed every 60 seconds from us-east, eu-west and Singapore. The leaderboard re-sorts continuously against fresh Prometheus samples.
Which ICON RPC endpoints work without an API key?
3 endpoints sustain continuous keyless probing at launch: ICON Foundation (ctz.solidwallet.io), ICON Community (api.icon.community), and iconblockchain.xyz. Every listed endpoint was live-verified before inclusion.
What is ICON and why does its RPC latency matter?
ICON is a South Korean blockchain focused on enterprise interoperability, originally built for connecting financial institutions and public organizations. ICX wallets, DApp integrations, and BTP cross-chain bridging all depend on reliable RPC access. Low latency matters for real-time ICX transfers and DeFi protocols built on the ICON ecosystem.
Does the fastest ICON RPC change by region?
Yes. The ICON Foundation node and community operators are distributed globally. The region tabs re-scope every number to a single probe origin so you can pick the best endpoint for your deployment geography.
What is the ICX token?
ICX is the native staking and governance token of the ICON network. It is used to pay transaction fees, stake with validators (P-Reps), and participate in on-chain governance. ICON uses a Delegated Proof of Contribution model where P-Reps are elected by ICX holders.
Source code github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities