CivicLens Cook County

CivicLens Cook County

Enables users to look up every layer of local government for any Cook County address, including representatives, finances, and agendas, with provenance and certainty levels for data.

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README

CivicLens Cook County

Public civic transparency database + MCP server. Enter any Cook County address → see every layer of local government you live under, who represents you, where the money goes, and what's on the next agenda.

Setup

python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env   # fill in DATABASE_URL (Supabase → Settings → Database)

Enable PostGIS in Supabase: Dashboard → Database → Extensions → postgis.

Load data

Fixture mode (no downloads needed — approximate boundaries, fake finances):

cd ingest
python tiger_loader.py --fixtures
python comptroller_loader.py --fixtures

Real data (see Build Spec §6 for sources):

python tiger_loader.py --cousub data/tl_2024_17_cousub.zip --place data/tl_2024_17_place.zip
python comptroller_loader.py --csv data/afr_export.csv

Run API

uvicorn api.main:app --reload
Endpoint Purpose
GET /governments?address=... Address → all containing units
GET /units?type=township&query=... List/search units
GET /units/{id} Unit profile + coverage flags
GET /units/{id}/finances?years_back=3 AFR summaries, per-capita
GET /compare?unit_ids=a,b&metric=per_capita_expenditures Compare units
GET /freshness Per-table as_of dates

Every response carries a provenance block: {source_url, as_of, certainty, note?}.

Data certainty levels

  • verified — from official filing, human-checked
  • extracted — parsed from PDF, may contain errors
  • stale_risk — older than its expected update cycle

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