io.github.mrfentmen/census-mcp
census-mcp
US Census population data by nation, state, and county. Requires a free Census API key.
alive probed 2026-10-19
3tools
≈ 185tokens, estimate
≈ <0.1 %of Claude's 200k window
0.1×the median server
294 msto initialize
8 msto list tools
- Run it
- npx -y census-mcp@1.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- census-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- ≈ <0.1 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: invalid x-api-key. The estimate stands in.
- Repository
- https://github.com/mrfentmen/census-mcp
- Registry
- active, updated 2026-09-21 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| get_state_population | 73 | 39 % |
| get_county_population | 66 | 36 % |
| get_nation_population | 46 | 25 % |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The Anthropic count_tokens endpoint refused the tool schemas (invalid x-api-key). A client that validates schemas can refuse them too.