Skip to main content
Rime provides regional API endpoints so you can route requests to the data center closest to your application’s deployment, reducing network latency.

​
HTTP endpoints

Use these endpoints for standard HTTP and SSE requests:
EndpointRegion
https://users.rime.aiUS West — default (alias for users-west)
https://users-west.rime.aiUS West (us-west-2)
https://users-east.rime.aiUS East (us-east-1)

​
WebSocket endpoints

Use these endpoints for real-time streaming over WebSocket. The regional routing pattern applies to every WebSocket path (/ws, /ws2, /ws3) — the /ws3 examples below are shown because it’s Rime’s flagship WebSocket endpoint.
EndpointRegion
wss://users-ws.rime.ai/ws3US West (us-west-2)
wss://users-east-ws.rime.ai/ws3US East (us-east-1)

​
Typical network latency

Use these rough round-trip times (RTT) — the back-and-forth network delay between your application and Rime — to pick the closest endpoint.
From metroTo US EastTo US West
East Coast (NYC, DC, Boston, Atlanta)5–25 ms60–85 ms
Midwest / South (Chicago, Dallas, Denver)25–55 ms35–65 ms
West Coast (SF, LA, Seattle)60–85 ms5–25 ms
Rules of thumb:
  • Same region (your app and the Rime endpoint in the same AWS region): typically 1–10 ms.
  • Coast-to-coast: ~60 ms is the physical floor, set by the speed of light in fiber across ~2,500 miles. 60–85 ms is normal.
  • Above 90 ms between major US metros usually points to a suboptimal network route, not Rime.
For voice AI: if you serve users nationwide from a single region, far-coast users will see 60–85 ms of network round-trip on top of Rime’s inference time. To stay comfortably under 200 ms end-to-end, route East-coast users to US East and West-coast users to US West. For the full latency picture — including Rime’s model-inference time, streaming TTFB, and the H100 benchmark numbers — see Latency.

​
Choosing a region

Choose the endpoint in the region closest to where your application is deployed. For example:
  • If your server runs in AWS us-west-2, use users-west.rime.ai / users-ws.rime.ai.
  • If your server runs in AWS us-east-1, use users-east.rime.ai / users-east-ws.rime.ai.
Use the rime speedtest command to measure TTFB against each endpoint from your machine.