{"slug":"zircuit-rpc","title":"Fastest free Zircuit RPC, live no-key endpoint latency","subtitle":"HTTP round-trip latency for eth_getBlockByNumber against every free, no-key public Zircuit RPC endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":185.333,"leader":{"name":"Zircuit Foundation","slug":"zircuit-official","value":185.333},"rankings":[{"name":"Zircuit Foundation","slug":"zircuit-official","ms":{"p50":185.333,"p90":223.667,"p99":232.667,"mean":190.514},"successRate":100,"sampleSize":4316.6}],"sparkline":[186.134,183.637,186.265,184.417,188.978,188.132,188.681,182.524,185.025,190.928,195.375,197.146,194.572,191.868,191.782,189.178,186.085,181.507,178.414,178.986,178.747,181.638,183.051,182.272,178.919,179.017,178.483,180.008,182.257,186.349,190.442,187.46,186.371,184.315,186.81,186.493,189.132,190.867,195.54,197.244,197.524,196.385,194.564,193.837,192.256,193.969,195.468,196.618,194.626,192.861,192.496,193.371,193.746,195.712,196.149,198.419,196.69,197.494,192.389,192.539,185.422,188.522,190.283,196.067,198.811,200.128,200.933,197.694,196.289,194.5,194.95,194.8,197.696],"sampleSize":4316.6,"asOf":"2026-08-08T12:55:17.760Z","headline":"Zircuit Foundation leads rpc latency at 185 ms (p50, 24h) on Fastest free Zircuit RPC, live no-key endpoint latency.","quote":"Zircuit Foundation leads rpc latency at 185 ms (p50, 24h) on Fastest free Zircuit RPC, live no-key endpoint latency. Source: OpenChainBench (https://openchainbench.com/benchmarks/zircuit-rpc).","cite":{"plain":"OpenChainBench. \"Fastest free Zircuit RPC, live no-key endpoint latency\". Retrieved 2026-08-08. https://openchainbench.com/benchmarks/zircuit-rpc","bibtex":"@misc{ocb_zircuit_rpc,\n  author = {OpenChainBench},\n  title  = {Fastest free Zircuit RPC, live no-key endpoint latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/zircuit-rpc},\n  note   = {Retrieved 2026-08-08}\n}","apa":"OpenChainBench. (2026). Fastest free Zircuit RPC, live no-key endpoint latency. Retrieved August 8, 2026, from https://openchainbench.com/benchmarks/zircuit-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Fastest free Zircuit RPC, live no-key endpoint latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/zircuit-rpc\r\nY2  - 2026-08-08\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/zircuit-rpc","ogImage":"https://openchainbench.com/api/og/zircuit-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\":\"eth_getBlockByNumber\",\"params\":[\"latest\",false]}`. 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 + non-empty result), `http_err`, `jsonrpc_err` (HTTP 200 carrying an error body), `stale` (more than 20 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=\"zircuit\"`. Provider coverage: 1 no-key endpoint (Zircuit Foundation)."],"license":"CC-BY-4.0"}