{"slug":"gram-rpc","title":"Gram RPC endpoints: free public URLs by latency","subtitle":"HTTP round-trip latency for getMasterchainInfo against every available public Gram (TON) node, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":47.1002,"leader":{"name":"Tatum","slug":"tatum","value":47.1002},"leaders":[{"name":"Tatum","slug":"tatum","value":47.1002}],"rankings":[{"name":"Tatum","slug":"tatum","ms":{"p50":47.1002,"p90":59.9985,"p99":148.493,"mean":53.6105},"successRate":75.06960000000001,"sampleSize":4292.81},{"name":"TON Center","slug":"toncenter","ms":{"p50":109.948,"p90":295.695,"p99":323.1,"mean":138.258},"successRate":100,"sampleSize":4324.79},{"name":"OnFinality","slug":"onfinality","ms":{"p50":211.818,"p90":278.225,"p99":1509.22,"mean":254.356},"successRate":99.7671,"sampleSize":4296.79},{"name":"Uniblock","slug":"uniblock","ms":{"p50":439.678,"p90":690.19,"p99":1430.36,"mean":469.098},"successRate":51.450300000000006,"sampleSize":4309.79}],"sparkline":[64.4908,64.889,65.8549,48.9917,48.1583,47.8621,48.2288,53.4389,53.0841,53.5491,49.311,51.5968,51.5906,50.1091,48.1169,48.5068,49.6367,49.3131,50.3135,59.7443,60.7436,63.4109,53.5343,53.0139,48.6274,48.995,93.9709,96.235,95.8082,50.4918,50.2527,50.8531,50.3181,48.8176,47.6291,46.7582,46.5595,47.858,48.581,48.3207,47.0579,48.5203,50.1167,52.208,53.38,54.8122,55.3183,55.4236,53.6735,52.1175,52.2065,52.7234,53.9336,51.5109,51.4279,52.895,53.0399,54.13,53.9918,53.0396,51.2751,49.5935,49.7114,50.5506,51.0352,51.8799,51.4233,52.1491,52.4026,53.9964,54.5686,57.2426,58.5597],"sampleSize":17224.18,"asOf":"2026-10-10T05:12:48.811Z","freshness":{"asOf":"2026-10-10T05:12:48.811Z","ageHours":0.1,"stale":false},"measured":4,"ranked":4,"headline":"Tatum has the lowest median latency of the 4 free public Gram RPC endpoints measured, 47 ms (p50, 24h, 3 regions).","quote":"Tatum has the lowest median latency of the 4 free public Gram RPC endpoints measured, 47 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/gram-rpc).","cite":{"plain":"OpenChainBench. \"Gram RPC endpoints: free public URLs by latency\". Retrieved 2026-10-10. https://openchainbench.com/benchmarks/gram-rpc","bibtex":"@misc{ocb_gram_rpc,\n  author = {OpenChainBench},\n  title  = {Gram RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/gram-rpc},\n  note   = {Retrieved 2026-10-10}\n}","apa":"OpenChainBench. (2026). Gram RPC endpoints: free public URLs by latency. Retrieved October 10, 2026, from https://openchainbench.com/benchmarks/gram-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - Gram RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/gram-rpc\r\nY2  - 2026-10-10\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/gram-rpc","ogImage":"https://openchainbench.com/api/og/gram-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\":\"getMasterchainInfo\",\"params\":{}}. Plain HTTP POST. The harness handles both the toncenter {ok,result} envelope and standard JSON-RPC 2.0 responses from other providers.","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 Gram-scoped view of the same harness, with the same exclusion rules.","Chain scope: every query on this page is pinned to chain=gram. Provider coverage today: 4 endpoints."],"license":"CC-BY-4.0"}