io.github.cyanheads/census-mcp-server
census-mcp-server
Query U.S. Census Bureau data, variables, and geography via MCP.
alive probed 2026-10-14 · HTTP 200
8tools
12ktokens in Claude Opus 5.5
12ktokens in Claude Code
5.9 %of a 200k context window
7.6ko200k_base estimate
281 msto initialize
96 msto list tools
- Endpoint
- https://census.caseyjhand.com/mcp (streamable-http)
- Host
- census.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- census-mcp-server 0.6.2
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 554 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/census-mcp-server
- Registry
- active, updated 2026-10-13 · registry entry
- Reachable
- 8 of the last 8 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| census_query_data | 2 227 | 29 % |
| census_compare_geographies | 1 948 | 25 % |
| census_resolve_geography | 1 141 | 15 % |
| census_list_predicate_values | 781 | 10 % |
| census_search_variables | 670 | 9 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-14 09:22 | alive | 725 ms | 8 | 12k | 7.6k |
| 2026-10-09 11:18 | alive | 792 ms | 8 | 11k | 7.1k |
| 2026-10-05 14:38 | alive | 281 ms | 8 | 11k | 7.1k |
| 2026-10-05 00:33 | alive | 164 ms | 8 | 7.1k | |
| 2026-10-04 10:04 | alive | 962 ms | 8 | 7.1k | |
| 2026-10-04 07:57 | alive | 510 ms | 8 | 7.1k | |
| 2026-10-03 20:37 | alive | 1.1 s | 8 | 7.1k | |
| 2026-10-03 17:53 | alive | 534 ms | 8 | 7.1k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/census-mcp-server)
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.