{"slug":"kusama-rpc","title":"Kusama RPC endpoints: free public URLs by 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":47.5277,"leader":{"name":"OnFinality","slug":"onfinality","value":47.5277},"leaders":[{"name":"OnFinality","slug":"onfinality","value":47.5277}],"rankings":[{"name":"OnFinality","slug":"onfinality","ms":{"p50":47.5277,"p90":198.348,"p99":1015.56,"mean":109.977},"successRate":99.6057,"sampleSize":4313.71},{"name":"PublicNode","slug":"publicnode","ms":{"p50":75.1608,"p90":95.0133,"p99":294.716,"mean":86.8723},"successRate":100,"sampleSize":4315.71},{"name":"dRPC","slug":"drpc","ms":{"p50":452.969,"p90":509.563,"p99":698.313,"mean":429.828},"successRate":97.6603,"sampleSize":4317.71}],"sparkline":[99.5349,116.302,123.83,99.6473,125.075,139.623,128.127,90.0141,105.767,113.994,112.842,71.8432,51.0574,50.4024,50.3077,50.6323,52.0907,87.2033,126.153,201.528,181.352,147.844,72.6938,64.1705,65.9407,63.8608,63.144,56.9215,61.6187,53.514,51.4607,51.284,84.1328,165.097,200.979,213.144,172.378,156.196,147.686,118.548,100.985,70.8548,65.1898,66.1586,109.488,175.787,224.558,207.573,173.848,161.757,148.01,116.273,67.9528,50.1528,52.4099,56.4887,59.8234,72.8265,136.23,160.264,144.908,124.271,124.289,124.562,84.2967,98.0602,149.149,142.187,113.138,72.0354,146.53,179.379,203.912],"sampleSize":12947.130000000001,"asOf":"2026-10-02T06:55:20.122Z","freshness":{"asOf":"2026-10-02T06:55:20.122Z","ageHours":0,"stale":false},"measured":3,"ranked":3,"headline":"OnFinality has the lowest median latency of the 3 free public Kusama RPC endpoints measured, 48 ms (p50, 24h, 3 regions).","quote":"OnFinality has the lowest median latency of the 3 free public Kusama RPC endpoints measured, 48 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/kusama-rpc).","cite":{"plain":"OpenChainBench. \"Kusama RPC endpoints: free public URLs by latency\". Retrieved 2026-10-02. https://openchainbench.com/benchmarks/kusama-rpc","bibtex":"@misc{ocb_kusama_rpc,\n  author = {OpenChainBench},\n  title  = {Kusama RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/kusama-rpc},\n  note   = {Retrieved 2026-10-02}\n}","apa":"OpenChainBench. (2026). Kusama RPC endpoints: free public URLs by latency. Retrieved October 2, 2026, from https://openchainbench.com/benchmarks/kusama-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Kusama RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/kusama-rpc\r\nY2  - 2026-10-02\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 measurement, call-result classification (`ok`, `http_err`, `jsonrpc_err`, `stale`, `timeout`) and the archive-depth audit follow the cluster method documented on [rpc-capabilities](https://openchainbench.com/benchmarks/rpc-capabilities#methodology); this page is the Kusama-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to `chain=\"kusama\"`. Provider coverage today: 3 no-key endpoints."],"license":"CC-BY-4.0"}