dev.openfrontier/frontier
Frontier
Discover Frontier inference capabilities and read sanitized usage through read-only tools.
alive probed 2026-10-05 · HTTP 200
3tools
307tokens in Claude Opus 5.5
331tokens in Claude Code
0.2 %of a 200k context window
163o200k_base estimate
1.2 sto initialize
107 msto list tools
- Endpoint
- https://openfrontier.dev/mcp (streamable-http)
- Host
- openfrontier.dev
- Protocol
- 2025-11-25
- Reports itself as
- frontier 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://openfrontier.dev/docs
- Registry
- active, updated 2026-08-14 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| get_capabilities | 58 | 36 % |
| get_usage | 55 | 34 % |
| list_models | 50 | 31 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 13:59 | alive | 1.2 s | 3 | 307 | 163 |
| 2026-10-05 00:24 | alive | 174 ms | 3 | 163 | |
| 2026-10-04 10:00 | alive | 901 ms | 3 | 163 | |
| 2026-10-04 07:53 | alive | 1.4 s | 3 | 163 | |
| 2026-10-03 20:33 | alive | 1.3 s | 3 | 163 | |
| 2026-10-03 17:50 | alive | 617 ms | 3 | 163 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.openfrontier/frontier)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.