Madison County, AL parcel and infrastructure data API

Parcel coverage in Madison County

About 190,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from October 2026. Each record has a stable korzy_id you can store and look up again with /api/parcel-record. Share of records with each field:

Owner name and mailing address are returned with include_owner=true, which doubles a request's cost: a parcel record costs 2 credits instead of 1. 99% of Madison County records carry an owner name.

Infrastructure in and around Madison County

Example requests for Madison County

Real responses from the production API, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.

1. Find a parcel by address

/api/search matches 165 WEST PARK LOOP NW, AL 35806 and returns the parcel's korzy_id, coordinates and record. 1 credit.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'q=165 WEST PARK LOOP NW, AL 35806' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "165 WEST PARK LOOP NW, AL 35806"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
parcel = response.json()["results"][0]
print(parcel["korzy_id"], parcel["longitude"], parcel["latitude"])

{
  "results": [
    {
      "korzy_id": "01089-a272c3190b8e5f21398a",
      "address": "165 WEST PARK LOOP NW",
      "postcode": "35806",
      "county": "Madison",
      "statefp": "01",
      "longitude": -86.69200402937432,
      "latitude": 34.74537345,
      "match_type": "exact",
      "parcelid": "105253",
      "parceladdr": "165 WEST PARK LOOP NW",
      "situs_zip": "35806",
      "taxacres": 2.27,
      "land_value_usd": 493600,
      "improvement_value_usd": 1511300,
      "assessed_value_usd": 362680,
      "market_value_usd": 2004900,
      "saledate": "2016-12-29",
      "updated": "2026-10-30",
      "geoid": "01089"
    }
  ],
  "truncated": false
}

With include_owner=true (2 credits) the record adds owner fields, shown here as placeholders:

{
  "owner_name": "EXAMPLE HOLDINGS LLC",
  "owner_mailing_address": "100 EXAMPLE ST, SAMPLE CITY, ST 00000"
}

2. Look up the parcel at a point

/api/query/point returns every parcel whose boundary covers the coordinates; here it returns the same record, 01089-a272c3190b8e5f21398a, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-86.692004' \
  --data-urlencode 'latitude=34.745373' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-86.692004", "latitude": "34.745373", "limit": "5"});
const response = await fetch(`https://api.korzy.co/api/query/point?${params}`, {
  headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { records } = await response.json();
console.log(records.map((record) => record.korzy_id));

3. Check nearby data-center projects

/api/datacenters/context lists data-center projects within 10 km of the point, nearest first. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-86.692004' \
  --data-urlencode 'latitude=34.745373' \
  --data-urlencode 'radius_km=10' \
  --data-urlencode 'limit=3' \
  https://api.korzy.co/api/datacenters/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/datacenters/context",
    params={"longitude": "-86.692004", "latitude": "34.745373", "radius_km": "10", "limit": "3"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
for project in response.json()["projects"]:
    print(project["name"], project["status"], project["distance_km"])

{
  "projects": [
    {
      "project_id": "dc_d302f928b264473f7318",
      "name": "SimpleHelix",
      "status": "unknown",
      "city": "Huntsville",
      "state": "AL",
      "longitude": -86.69188299999999,
      "latitude": 34.745430999999996,
      "location_precision": "footprint",
      "distance_km": 0.01279917376492057
    },
    {
      "project_id": "dc_5bd7ef8f8ee1869011ea",
      "name": "Simple Helix Data Center",
      "operator": "Simple Helix, LLC",
      "status": "operating",
      "city": "Huntsville",
      "state": "AL",
      "longitude": -86.691765682048,
      "latitude": 34.744816340398,
      "location_precision": "approximate",
      "distance_km": 0.06561614828232268
    },
    {
      "project_id": "dc_122221a71926daf62b39",
      "name": "Alabama Supercomputer Center",
      "operator": "Alabama Supercomputer Authority",
      "status": "operating",
      "city": "Huntsville",
      "state": "AL",
      "longitude": -86.67312713368352,
      "latitude": 34.73651995,
      "location_precision": "footprint",
      "distance_km": 1.985985950887515
    }
  ],
  "radius_km": 10,
  "limit": 3,
  "truncated": true
}

Madison County data questions

How many parcels in Madison County include last sale?

About 180,000 of about 190,000 parcel records (95%) include last sale.

Does the Korzy API return owner names for Madison County parcels?

Yes. 99% of Madison County parcel records carry an owner name. Add include_owner=true to a point, search or parcel-record request; it doubles the request's cost, so a single parcel record costs 2 credits.

How many data-center projects are in Madison County?

Korzy tracks 7 data-center projects in Madison County: 5 operating and 2 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Madison County?

2 operable power plants in Madison County total about 45 MW of nameplate capacity, mainly solar and battery and pumped storage.

Which water systems serve Madison County?

Service areas of about 10 community water systems cover about 41% of Madison County, and sewer service areas cover about 16%. /api/utilities/context returns the water and sewer matches at a point.

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