io.github.squidcode/tapwatermap
tapwatermap
Query US tap-water quality from the EPA's SDWIS records — by city, system, or contaminant.
alive probed 2026-10-05 · HTTP 200
10tools
1.6ktokens in Claude Opus 5.5
1.7ktokens in Claude Code
0.8 %of a 200k context window
883o200k_base estimate
149 msto initialize
52 msto list tools
- Endpoint
- https://mcp.tapwatermap.com/mcp (streamable-http)
- Host
- mcp.tapwatermap.com
- Protocol
- 2025-11-25
- Reports itself as
- tapwatermap 1.0.0
- Capabilities
- tools
- Instructions
- 208 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://tapwatermap.com/developers/
- Registry
- active, updated 2026-06-25 · registry entry
- Reachable
- 5 of the last 5 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| find_cities | 146 | 17 % |
| get_city_water | 119 | 13 % |
| explain_contaminant | 106 | 12 % |
| fetch | 88 | 10 % |
| search_cities | 86 | 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 00:56 | alive | 149 ms | 10 | 1.6k | 883 |
| 2026-10-04 10:07 | alive | 497 ms | 10 | 883 | |
| 2026-10-04 08:00 | alive | 441 ms | 10 | 883 | |
| 2026-10-03 20:40 | alive | 431 ms | 10 | 883 | |
| 2026-10-03 17:55 | alive | 424 ms | 10 | 883 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.squidcode/tapwatermap)
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.