{"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":30.0018,"leader":{"name":"Flow Access Node","slug":"flow-access","value":30.0018},"leaders":[{"name":"Flow Access Node","slug":"flow-access","value":30.0018}],"rankings":[{"name":"Flow Access Node","slug":"flow-access","ms":{"p50":30.0018,"p90":61.5004,"p99":110.206,"mean":39.5325},"successRate":100,"sampleSize":4317.72},{"name":"Flow Foundation","slug":"onflow","ms":{"p50":31.7966,"p90":61.6793,"p99":113.254,"mean":41.2985},"successRate":100,"sampleSize":4320.72}],"sparkline":[34.5515,33.6052,35.3116,37.411,36.6682,37.0906,35.503,36.5531,35.6469,35.4396,38.3538,48.3786,60.4251,68.5225,69.0054,67.3988,66.3784,54.8672,43.1594,32.7247,34.1011,35.1161,35.4357,36.1578,35.6069,36.889,33.5628,32.5074,31.9708,32.2077,33.0398,32.1609,33.1056,34.8017,35.365,37.8726,39.6463,49.1346,51.5475,54.8651,50.8146,49.6707,47.9465,46.7072,47.4136,44.6645,41.1331,36.1397,35.593,33.5191,32.7536,32.5506,33.824,34.4009,33.1702,31.6337,30.8997,34.5192,37.6009,39.8988,38.4794,37.8629,38.8794,38.1853,36.5952,34.2041,33.8678,34.5902,34.8704,32.8993,31.8929,32.1152,31.8159],"sampleSize":8638.44,"asOf":"2026-10-07T00:50:47.680Z","freshness":{"asOf":"2026-10-07T00:50:47.680Z","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, 30 ms (p50, 24h, 3 regions).","quote":"Flow Access Node has the lowest median latency of the 2 free public Flow RPC endpoints measured, 30 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 2026-10-07. 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 2026-10-07}\n}","apa":"OpenChainBench. (2026). Flow RPC endpoints: free public URLs by latency. Retrieved October 7, 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  - 2026-10-07\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"}