com.tallyfern/rates
Tallyfern Rates (Canada)
Read-only Canadian GST/HST rates, small-supplier check and CRA allowance rates, with CRA sources.
alive probed 2026-10-07 · HTTP 200
5tools
1.7ktokens in Claude Opus 5.5
1.7ktokens in Claude Code
0.8 %of a 200k context window
948o200k_base estimate
706 msto initialize
275 msto list tools
- Endpoint
- https://mcp.tallyfern.com/mcp (streamable-http)
- Host
- mcp.tallyfern.com
- Protocol
- 2025-11-25
- Reports itself as
- tallyfern-rates 0.3.0
- Capabilities
- tools
- Instructions
- 319 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://tallyfern.com/
- Registry
- active, updated 2026-10-03 · registry entry
- Reachable
- 7 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| gst_hst_small_supplier_check | 322 | 34 % |
| cra_meal_travel_allowance | 215 | 23 % |
| cra_automobile_allowance_rate | 202 | 21 % |
| gst_hst_rate_by_province | 129 | 14 % |
| ontario_hst_basics | 80 | 8 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-07 11:04 | alive | 1.2 s | 5 | 1.7k | 948 |
| 2026-10-05 13:45 | alive | 706 ms | 5 | 1.7k | 948 |
| 2026-10-05 00:21 | alive | 265 ms | 5 | 948 | |
| 2026-10-04 09:58 | alive | 667 ms | 5 | 948 | |
| 2026-10-04 07:52 | alive | 638 ms | 5 | 948 | |
| 2026-10-03 20:32 | alive | 568 ms | 5 | 948 | |
| 2026-10-03 17:49 | alive | 309 ms | 5 | 948 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.tallyfern/rates)
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.