{"slug":"kusama-rpc","title":"Fastest free Kusama RPC, live no-key endpoint latency","subtitle":"HTTP round-trip latency for chain_getHeader against every free, no-key public Kusama relay-chain endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":57.0774,"leader":{"name":"OnFinality","slug":"onfinality","value":57.0774},"rankings":[{"name":"OnFinality","slug":"onfinality","ms":{"p50":57.0774,"p90":351.152,"p99":2202.57,"mean":183.681},"successRate":100,"sampleSize":4293.96},{"name":"PublicNode","slug":"publicnode","ms":{"p50":258.518,"p90":596.106,"p99":742.658,"mean":338.275},"successRate":100,"sampleSize":4306.97},{"name":"dRPC","slug":"drpc","ms":{"p50":784.436,"p90":980.491,"p99":1295.27,"mean":778.97},"successRate":91.59530000000001,"sampleSize":4319.97}],"sparkline":[286.951,264.17,226.975,169.007,137.17,101.427,83.31,199.338,348.716,411.582,333.971,217.526,177.263,193.416,227.313,221.984,164.095,93.534,55.6491,54.651,142.452,186.184,202.044,141.218,104.535,174.3,177.592,217.583,160.74,155.515,137.945,198.947,248.601,306.624,228.669,198.317,144.701,192.714,214.998,271.646,297.688,299.05,283.972,189.352,123.78,57.3261,95.5364,168.552,250.539,277.914,241.405,185.369,152.714,137.858,125.743,144.549,195.164,246.04,250.661,242.297,224.29,194.77,131.929,85.4755,82.7101,129.892,155.314,148.517,153.711,160.569,184.689,135.952,146.905],"sampleSize":12920.900000000001,"asOf":"2026-08-14T08:22:56.890Z","headline":"OnFinality leads rpc latency at 57 ms (p50, 24h) on Fastest free Kusama RPC, live no-key endpoint latency.","quote":"OnFinality leads rpc latency at 57 ms (p50, 24h) on Fastest free Kusama RPC, live no-key endpoint latency. Source: OpenChainBench (https://openchainbench.com/benchmarks/kusama-rpc).","cite":{"plain":"OpenChainBench. \"Fastest free Kusama RPC, live no-key endpoint latency\". Retrieved 2026-08-14. https://openchainbench.com/benchmarks/kusama-rpc","bibtex":"@misc{ocb_kusama_rpc,\n  author = {OpenChainBench},\n  title  = {Fastest free Kusama RPC, live no-key endpoint latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/kusama-rpc},\n  note   = {Retrieved 2026-08-14}\n}","apa":"OpenChainBench. (2026). Fastest free Kusama RPC, live no-key endpoint latency. Retrieved August 14, 2026, from https://openchainbench.com/benchmarks/kusama-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Fastest free Kusama RPC, live no-key endpoint latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/kusama-rpc\r\nY2  - 2026-08-14\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/kusama-rpc","ogImage":"https://openchainbench.com/api/og/kusama-rpc","source":"https://github.com/ChainBench/OpenChainBench/tree/main/harnesses/rpc-capabilities","methodology":["Cadence: every 60 seconds per provider, from each of 3 probe regions (us-east Virginia, eu-west Amsterdam, sgp Singapore). Headline p50/p90/p99 aggregate across all 3 regions via Prometheus `avg(quantile_over_time(...))`; per-region breakdowns are first-class on this page via the region tabs.","Payload: `{\"jsonrpc\":\"2.0\",\"id\":<rotating>,\"method\":\"chain_getHeader\",\"params\":[]}`. Plain HTTP POST, identical for every endpoint, no API key in any request.","Latency: client-side round-trip delta in milliseconds, exposed as both a gauge and a histogram (buckets 50 ms to 10 s), so percentiles are computed via Prometheus `quantile_over_time` over the last 24 hours.","Call-result classification: `ok` (HTTP 200 + parsable hex block number), `http_err`, `jsonrpc_err`, `stale` (more than 40 relay blocks behind the cross-provider tip), `timeout`.","This page is part of the per-chain RPC cluster derived from the cross-chain [rpc-capabilities](https://openchainbench.com/benchmarks/rpc-capabilities) benchmark; the identical harness, cadence and exclusion rules apply on every chain.","Chain scope: every query on this page is pinned to `chain=\"kusama\"`. Provider coverage at launch: 6 no-key endpoints."],"license":"CC-BY-4.0"}