{"slug":"immutable-rpc","title":"Immutable zkEVM RPC endpoints: free public URLs by latency","subtitle":"HTTP round-trip latency for the `eth_getBlockByNumber(\\\"latest\\\", false)` method against every free, no-key public Immutable zkEVM EVM endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":124.983,"leader":{"name":"Immutable","slug":"immutable-official","value":124.983},"leaders":[{"name":"Immutable","slug":"immutable-official","value":124.983}],"rankings":[{"name":"Immutable","slug":"immutable-official","ms":{"p50":124.983,"p90":128.755,"p99":160.772,"mean":125.978},"successRate":100,"sampleSize":4331.75},{"name":"Tenderly Gateway","slug":"tenderly","ms":{"p50":140.666,"p90":148.871,"p99":157.937,"mean":140.644},"successRate":100,"sampleSize":4304.75}],"sparkline":[128.59,129.73,130.023,127.262,129.397,128.93,128.439,125.556,124.885,125.3,125.517,125.401,124.966,124.536,124.553,125.135,125.41,124.838,124.136,124.207,125.445,126.7,127.049,126.137,124.433,123.684,124.321,124.674,124.735,124.449,124.954,125.349,125.476,125.613,125.66,125.585,125.472,125.31,125.27,125.237,125.061,125.064,125.03,125.045,125.376,125.323,125.599,125.059,125.388,125.336,125.648,125.445,125.333,125.294,124.964,126.528,128.293,128.485,127.911,128.514,128.273,128.027,125.935,126.081,130.066,130.298,130.617,126.2,125.431,125.412,125.804,125.953,126.285],"sampleSize":17284,"asOf":"2026-10-25T15:57:20.443Z","freshness":{"asOf":"2026-10-25T15:57:20.443Z","ageHours":0.1,"stale":false},"measured":3,"ranked":2,"headline":"Immutable has the lowest median latency of the 2 free public Immutable zkEVM RPC endpoints measured above the 50 % success floor (3 listed), 125 ms (p50, 24h, 3 regions).","quote":"Immutable has the lowest median latency of the 2 free public Immutable zkEVM RPC endpoints measured above the 50 % success floor (3 listed), 125 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/immutable-rpc).","cite":{"plain":"OpenChainBench. \"Immutable zkEVM RPC endpoints: free public URLs by latency\". Retrieved 2026-10-25. https://openchainbench.com/benchmarks/immutable-rpc","bibtex":"@misc{ocb_immutable_rpc,\n  author = {OpenChainBench},\n  title  = {Immutable zkEVM RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/immutable-rpc},\n  note   = {Retrieved 2026-10-25}\n}","apa":"OpenChainBench. (2026). Immutable zkEVM RPC endpoints: free public URLs by latency. Retrieved October 25, 2026, from https://openchainbench.com/benchmarks/immutable-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Immutable zkEVM RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/immutable-rpc\r\nY2  - 2026-10-25\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/immutable-rpc","ogImage":"https://openchainbench.com/api/og/immutable-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. The request id rotates, but that does not guarantee a cache miss: many caches normalise `id` away. Measured 2026-10-08, fixed and rotating ids answer within 2 to 4 percent of each other.","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 Immutable zkEVM-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to `chain=\"immutable\"`. Provider coverage today: 3 no-key endpoints."],"license":"CC-BY-4.0"}