MCP server for US civic & property data: geocoding, census tracts, Opportunity Zones, ACS demographics, and FEMA flood zones — from free federal open data.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add civic-library --env CENSUS_API_KEY='<CENSUS_API_KEY>' -- npx -y civic-library-mcp~/.codex/config.toml
[mcp_servers.civic-library]
command = "npx"
args = ["-y", "civic-library-mcp"]
env = { CENSUS_API_KEY = "<CENSUS_API_KEY>" }
# codex mcp add civic-library --env CENSUS_API_KEY='<CENSUS_API_KEY>' -- npx -y civic-library-mcp~/.cursor/mcp.json
{
"mcpServers": {
"civic-library": {
"command": "npx",
"args": [
"-y",
"civic-library-mcp"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"civic-library": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"civic-library-mcp"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"civic-library": {
"command": "npx",
"args": [
"-y",
"civic-library-mcp"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"civic-library": {
"command": "npx",
"args": [
"-y",
"civic-library-mcp"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"civic-library": {
"command": "npx",
"args": [
"-y",
"civic-library-mcp"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}Environment variables
CENSUS_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.