{"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":55.6144,"leader":{"name":"OnFinality","slug":"onfinality","value":55.6144},"rankings":[{"name":"OnFinality","slug":"onfinality","ms":{"p50":55.6144,"p90":330.056,"p99":2296.55,"mean":178.283},"successRate":100,"sampleSize":4314.76},{"name":"PublicNode","slug":"publicnode","ms":{"p50":142.75,"p90":593.15,"p99":657.52,"mean":241.042},"successRate":100,"sampleSize":4316.76},{"name":"dRPC","slug":"drpc","ms":{"p50":742.57,"p90":983.9,"p99":1192.14,"mean":753.967},"successRate":94.1612,"sampleSize":4316.76}],"sparkline":[126.052,184.512,219.478,263.049,203.566,141.53,96.9441,102.985,106.759,71.1777,87.682,105.735,195.697,206.802,224.596,170.754,186.732,197.74,183.603,139.553,88.6179,70.4336,71.484,74.1359,68.8625,96.4845,129.146,148.368,137.863,140.701,158.229,147.87,109.953,71.4257,98.8181,144.952,224.459,226.972,221.601,200.455,183.399,185.18,170.866,221.145,232.183,237.82,211.724,272.677,327.67,399.953,428.76,391.464,347.496,235.639,219.381,203.054,202.499,179.851,159.772,172.635,261.024,237.654,192.266,73.7756,54.4937,55.2464,58.3113,60.8167,121.63,215.751,238.801,264.843,245.761],"sampleSize":12948.28,"asOf":"2026-09-10T03:59:18.044Z","headline":"OnFinality posts the lowest rpc latency at 56 ms (p50, 24h) on Fastest free Kusama RPC, live no-key endpoint latency.","quote":"OnFinality posts the lowest rpc latency at 56 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 2026-09-10. 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 2026-09-10}\n}","apa":"OpenChainBench. (2026). Fastest free Kusama RPC, live no-key endpoint latency. Retrieved September 10, 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  - 2026-09-10\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"}