{"slug":"flow-rpc","title":"Flow RPC endpoints: free public URLs by latency","subtitle":"HTTP round-trip latency for the Flow Cadence REST endpoint (GET /v1/blocks?height=sealed) against every available public Flow node, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":28.4742,"leader":{"name":"Flow Access Node","slug":"flow-access","value":28.4742},"leaders":[{"name":"Flow Access Node","slug":"flow-access","value":28.4742}],"rankings":[{"name":"Flow Access Node","slug":"flow-access","ms":{"p50":28.4742,"p90":58.0383,"p99":111.428,"mean":35.2235},"successRate":100,"sampleSize":4288.71},{"name":"Flow Foundation","slug":"onflow","ms":{"p50":28.7895,"p90":59.457,"p99":113.685,"mean":37.0841},"successRate":100,"sampleSize":4321.71}],"sparkline":[40.3919,38.0715,34.8427,32.3598,31.622,32.1846,31.5561,32.0419,33.0146,32.117,31.1542,29.7297,31.8217,31.9934,32.3356,31.6698,34.9192,37.7598,38.0064,35.749,34.0968,34.0766,35.8694,36.1663,37.8706,38.137,40.0239,40.4184,38.2217,36.1794,36.0565,36.9584,39.1162,37.466,37.9984,35.193,35.4657,36.5188,36.8216,39.495,39.4246,39.7164,34.9267,31.1411,30.2992,32.9617,34.4187,34.4003,32.1032,31.4285,33.0669,33.2044,33.6492,32.6906,34.2296,35.1714,35.6735,37.6282,38.3889,38.7156,35.368,35.7402,33.6878,34.8292,36.2513,37.9221,37.8664,35.3161,36.5804,36.8065,37.1872,36.37,36.7959],"sampleSize":8610.42,"asOf":"2026-10-08T08:36:47.556Z","freshness":{"asOf":"2026-10-08T08:36:47.556Z","ageHours":0.1,"stale":false},"measured":2,"ranked":2,"headline":"Flow Access Node has the lowest median latency of the 2 free public Flow RPC endpoints measured, 28 ms (p50, 24h, 3 regions).","quote":"Flow Access Node has the lowest median latency of the 2 free public Flow RPC endpoints measured, 28 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/flow-rpc).","cite":{"plain":"OpenChainBench. \"Flow RPC endpoints: free public URLs by latency\". Retrieved 2026-10-08. https://openchainbench.com/benchmarks/flow-rpc","bibtex":"@misc{ocb_flow_rpc,\n  author = {OpenChainBench},\n  title  = {Flow RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/flow-rpc},\n  note   = {Retrieved 2026-10-08}\n}","apa":"OpenChainBench. (2026). Flow RPC endpoints: free public URLs by latency. Retrieved October 8, 2026, from https://openchainbench.com/benchmarks/flow-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Flow RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/flow-rpc\r\nY2  - 2026-10-08\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/flow-rpc","ogImage":"https://openchainbench.com/api/og/flow-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: HTTP GET to <base>/v1/blocks?height=sealed with Accept: application/json. Pure REST endpoint, no API key. The response is a JSON array; [0].header.height is parsed as a decimal string.","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 Flow-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to chain=flow. Provider coverage today: 2 endpoints (Flow Foundation REST, Flow access node)."],"license":"CC-BY-4.0"}