{"slug":"tac-rpc","title":"TAC 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 TAC EVM endpoint, audited every 60 seconds from 3 regions.","category":"RPCs","metric":"RPC latency","unit":"ms","status":"live","higherIsBetter":false,"filters":null,"value":43.3533,"leader":{"name":"TAC","slug":"tac-official","value":43.3533},"leaders":[{"name":"TAC","slug":"tac-official","value":43.3533}],"rankings":[{"name":"TAC","slug":"tac-official","ms":{"p50":43.3533,"p90":222.079,"p99":478.581,"mean":97.0744},"successRate":100,"sampleSize":765.827},{"name":"Ankr","slug":"ankr","ms":{"p50":53.8245,"p90":170.348,"p99":695.415,"mean":89.7568},"successRate":100,"sampleSize":777.837},{"name":"dRPC","slug":"drpc","ms":{"p50":120.753,"p90":162.614,"p99":215.052,"mean":130.124},"successRate":100,"sampleSize":781.842}],"sparkline":[103.081,107.121,106.395,111.104,120.886,121.454,112.473,93.7732,83.3774,79.9807,79.4013,90.8679,85.0295,88.1698],"sampleSize":3098.343,"asOf":"2026-10-07T22:53:44.593Z","freshness":{"asOf":"2026-10-07T22:53:44.593Z","ageHours":0.1,"stale":false},"measured":3,"ranked":3,"headline":"TAC has the lowest median latency of the 3 free public TAC RPC endpoints measured, 43 ms (p50, 24h, 3 regions).","quote":"TAC has the lowest median latency of the 3 free public TAC RPC endpoints measured, 43 ms (p50, 24h, 3 regions). Source: OpenChainBench (https://openchainbench.com/benchmarks/tac-rpc).","cite":{"plain":"OpenChainBench. \"TAC RPC endpoints: free public URLs by latency\". Retrieved 2026-10-07. https://openchainbench.com/benchmarks/tac-rpc","bibtex":"@misc{ocb_tac_rpc,\n  author = {OpenChainBench},\n  title  = {TAC RPC endpoints: free public URLs by latency},\n  year   = {2026},\n  url    = {https://openchainbench.com/benchmarks/tac-rpc},\n  note   = {Retrieved 2026-10-07}\n}","apa":"OpenChainBench. (2026). TAC RPC endpoints: free public URLs by latency. Retrieved October 7, 2026, from https://openchainbench.com/benchmarks/tac-rpc","ris":"TY  - GEN\r\nAU  - OpenChainBench\r\nTI  - TAC RPC endpoints: free public URLs by latency\r\nPY  - 2026\r\nUR  - https://openchainbench.com/benchmarks/tac-rpc\r\nY2  - 2026-10-07\r\nER  - \r\n"},"pageUrl":"https://openchainbench.com/benchmarks/tac-rpc","ogImage":"https://openchainbench.com/api/og/tac-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. Non-cacheable by design: the rotating id defeats edge caches that would answer a bare head query without touching a node.","Latency measurement, call-result classification (`ok`, `http_err`, `jsonrpc_err`, `stale`, `timeout`) and the exclusion rules follow the cluster method documented on [rpc-capabilities](https://openchainbench.com/benchmarks/rpc-capabilities#methodology); this page is the TAC-scoped view of the same harness.","Roster: every endpoint here answered a real `eth_getBlockByNumber` call without a key on the 2026-10-07 sweep before being added to the probe matrix. An endpoint that needs a key, region-blocks us or rate-limits below the 60-second cadence is excluded rather than listed with an asterisk.","Chain scope: every query on this page is pinned to `chain=\"tac\"`. Provider coverage: 3 no-key endpoints."],"license":"CC-BY-4.0"}