com.pplfree/ground-school
PPL Free Ground School
Free FAA private-pilot ground school: source-cited answers, lessons and practice questions.
alive probed 2026-10-05 · HTTP 200
5tools
1.8ktokens in Claude Opus 5.5
1.8ktokens in Claude Code
0.9 %of a 200k context window
1.1ko200k_base estimate
381 msto initialize
271 msto list tools
- Endpoint
- https://pplfree.com/mcp (streamable-http)
- Host
- pplfree.com
- Protocol
- 2025-06-18
- Reports itself as
- com.pplfree/ground-school 1.1.0
- Capabilities
- tools
- Instructions
- 818 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://pplfree.com/mcp-server
- Registry
- active, updated 2026-09-26 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| get_practice_question | 344 | 32 % |
| check_answer | 282 | 26 % |
| search_faa_knowledge | 198 | 18 % |
| get_lesson | 142 | 13 % |
| list_curriculum | 109 | 10 % |
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 13:34 | alive | 381 ms | 5 | 1.8k | 1.1k |
| 2026-10-05 00:19 | alive | 175 ms | 5 | 1.1k | |
| 2026-10-04 09:57 | alive | 1.6 s | 5 | 1.1k | |
| 2026-10-04 07:51 | alive | 871 ms | 5 | 1.1k | |
| 2026-10-03 20:31 | alive | 1.3 s | 5 | 1.1k | |
| 2026-10-03 17:49 | alive | 776 ms | 5 | 1.1k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.pplfree/ground-school)
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.