io.github.oasdiff/oasdiff
oasdiff
Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.
alive probed 2026-10-05 · HTTP 200
4tools
1.2ktokens in Claude Opus 5.5
1.3ktokens in Claude Code
0.6 %of a 200k context window
699o200k_base estimate
548 msto initialize
66 msto list tools
- Endpoint
- https://api.oasdiff.com/mcp (streamable-http)
- Host
- api.oasdiff.com
- Protocol
- 2025-11-25
- Reports itself as
- oasdiff 1.0.0
- Capabilities
- logging, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Registry
- active, updated 2026-06-16 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| oasdiff_breaking_changes | 196 | 28 % |
| oasdiff_changelog | 184 | 26 % |
| oasdiff_diff | 175 | 25 % |
| oasdiff_validate | 144 | 21 % |
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 15:23 | alive | 548 ms | 4 | 1.2k | 699 |
| 2026-10-05 00:43 | alive | 188 ms | 4 | 699 | |
| 2026-10-04 10:06 | alive | 1.3 s | 4 | 699 | |
| 2026-10-04 07:59 | alive | 1.1 s | 4 | 699 | |
| 2026-10-03 20:39 | alive | 958 ms | 4 | 699 | |
| 2026-10-03 17:54 | alive | 479 ms | 4 | 699 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.oasdiff/oasdiff)
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.