{"slug":"ckb-rpc","title":"Nervos CKB RPC endpoints: free public URLs by latency","subtitle":"HTTP round-trip latency for get_tip_block_number against every available public Nervos CKB node, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":153.189,"leader":{"name":"Nervos Foundation","slug":"ckb-dev","value":153.189},"leaders":[{"name":"Nervos Foundation","slug":"ckb-dev","value":153.189}],"rankings":[{"name":"Nervos Foundation","slug":"ckb-dev","ms":{"p50":153.189,"p90":360.806,"p99":473.811,"mean":189.695},"successRate":99.9769,"sampleSize":4320.72},{"name":"CKBapp","slug":"ckbapp","ms":{"p50":166.487,"p90":461.655,"p99":491.431,"mean":237.342},"successRate":100,"sampleSize":4319.72}],"sparkline":[220.749,217.093,218.675,197.79,196.456,178.16,172.23,175.176,171.053,166.481,159.9,161.406,162.772,161.317,160.366,160.431,164.184,161.727,160.119,158.381,165.73,170.268,179.942,184.941,187.314,186.76,187.487,227.614,230.765,229.528,193.34,189.329,188.33,195.605,201.995,210.608,205.309,212.473,197.18,208.818,201.267,222.415,214.372,215.311,210.683,208.408,207.944,206.33,204.153,207.282,204.626,201.936,215.394,225.902,227.276,215.372,209.775,208.573,195.565,180.268,172.661,166.796,174.922,175.265,184.02,178.163,181.031,176.649,178.88,176.758,173.332,168.856,167.866],"sampleSize":8640.44,"asOf":"2026-10-07T00:50:47.675Z","freshness":{"asOf":"2026-10-07T00:50:47.675Z","ageHours":0.1,"stale":false},"measured":2,"ranked":2,"headline":"Nervos Foundation has the lowest median latency of the 2 free public Nervos CKB RPC endpoints measured, 153 ms (p50, 24h, 3 regions).","quote":"Nervos Foundation has the lowest median latency of the 2 free public Nervos CKB RPC endpoints measured, 153 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/ckb-rpc).","cite":{"plain":"OpenChainBench. \"Nervos CKB RPC endpoints: free public URLs by latency\". Retrieved 2026-10-07. https://openchainbench.com/benchmarks/ckb-rpc","bibtex":"@misc{ocb_ckb_rpc,\n  author = {OpenChainBench},\n  title  = {Nervos CKB RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/ckb-rpc},\n  note   = {Retrieved 2026-10-07}\n}","apa":"OpenChainBench. (2026). Nervos CKB RPC endpoints: free public URLs by latency. Retrieved October 7, 2026, from https://openchainbench.com/benchmarks/ckb-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Nervos CKB RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/ckb-rpc\r\nY2  - 2026-10-07\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/ckb-rpc","ogImage":"https://openchainbench.com/api/og/ckb-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\":\"get_tip_block_number\",\"params\":[]}. Plain HTTP POST. The result field is a hex-encoded block number string (0x prefix).","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 Nervos CKB-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to chain=ckb. Provider coverage today: 2 endpoints."],"license":"CC-BY-4.0"}