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claude-scientific-skills/scientific-skills/fred-economic-data/references/categories.md

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FRED Categories Endpoints

Categories endpoints provide access to the hierarchical organization of economic data series.

Table of Contents

  1. fred/category - Get a category
  2. fred/category/children - Get child categories
  3. fred/category/related - Get related categories
  4. fred/category/series - Get series in category
  5. fred/category/tags - Get category tags
  6. fred/category/related_tags - Get related tags

Category Hierarchy

FRED organizes data in a hierarchical category structure. The root category has category_id=0.

Top-level categories (children of root):

  • Money, Banking, & Finance (32991)
  • Population, Employment, & Labor Markets (10)
  • National Accounts (32992)
  • Production & Business Activity (32455)
  • Prices (32455)
  • International Data (32263)
  • U.S. Regional Data (3008)
  • Academic Data (33060)

fred/category

Get a category.

URL: https://api.stlouisfed.org/fred/category

Required Parameters

Parameter Type Description
api_key string 32-character API key

Optional Parameters

Parameter Type Default Description
category_id integer 0 Category ID; 0 = root
file_type string xml xml or json

Example

# Get root category
response = requests.get(
    "https://api.stlouisfed.org/fred/category",
    params={
        "api_key": API_KEY,
        "category_id": 0,
        "file_type": "json"
    }
)

# Get Trade Balance category
response = requests.get(
    "https://api.stlouisfed.org/fred/category",
    params={
        "api_key": API_KEY,
        "category_id": 125,
        "file_type": "json"
    }
)

Response

{
  "categories": [
    {
      "id": 125,
      "name": "Trade Balance",
      "parent_id": 13
    }
  ]
}

fred/category/children

Get child categories for a category.

URL: https://api.stlouisfed.org/fred/category/children

Required Parameters

Parameter Type Description
api_key string 32-character API key

Optional Parameters

Parameter Type Default Description
category_id integer 0 Parent category ID
file_type string xml xml or json
realtime_start date today YYYY-MM-DD
realtime_end date today YYYY-MM-DD

Example

# Get children of International Trade category (13)
response = requests.get(
    "https://api.stlouisfed.org/fred/category/children",
    params={
        "api_key": API_KEY,
        "category_id": 13,
        "file_type": "json"
    }
)

Response

{
  "categories": [
    {"id": 16, "name": "Exports", "parent_id": 13},
    {"id": 17, "name": "Imports", "parent_id": 13},
    {"id": 3000, "name": "Income Payments & Receipts", "parent_id": 13},
    {"id": 125, "name": "Trade Balance", "parent_id": 13},
    {"id": 127, "name": "U.S. International Finance", "parent_id": 13}
  ]
}

fred/category/related

Get related categories for a category.

URL: https://api.stlouisfed.org/fred/category/related

Required Parameters

Parameter Type Description
api_key string 32-character API key
category_id integer Category ID

Optional Parameters

Parameter Type Default Description
file_type string xml xml or json
realtime_start date today YYYY-MM-DD
realtime_end date today YYYY-MM-DD

Note: Related categories represent one-way relationships that exist outside the standard parent-child hierarchy. Most categories do not have related categories.

Example

response = requests.get(
    "https://api.stlouisfed.org/fred/category/related",
    params={
        "api_key": API_KEY,
        "category_id": 32073,
        "file_type": "json"
    }
)

Response

{
  "categories": [
    {"id": 149, "name": "Arkansas", "parent_id": 27281},
    {"id": 150, "name": "Illinois", "parent_id": 27281}
  ]
}

fred/category/series

Get the series in a category.

URL: https://api.stlouisfed.org/fred/category/series

Required Parameters

Parameter Type Description
api_key string 32-character API key
category_id integer Category ID

Optional Parameters

Parameter Type Default Description
file_type string xml xml or json
realtime_start date today YYYY-MM-DD
realtime_end date today YYYY-MM-DD
limit integer 1000 1-1000
offset integer 0 Pagination offset
order_by string series_id Sort field
sort_order string asc asc or desc
filter_variable string - frequency, units, seasonal_adjustment
filter_value string - Filter value
tag_names string - Semicolon-delimited tags
exclude_tag_names string - Tags to exclude

Order By Options

  • series_id
  • title
  • units
  • frequency
  • seasonal_adjustment
  • realtime_start
  • realtime_end
  • last_updated
  • observation_start
  • observation_end
  • popularity
  • group_popularity

Example

# Get series in Trade Balance category with monthly frequency
response = requests.get(
    "https://api.stlouisfed.org/fred/category/series",
    params={
        "api_key": API_KEY,
        "category_id": 125,
        "file_type": "json",
        "filter_variable": "frequency",
        "filter_value": "Monthly",
        "order_by": "popularity",
        "sort_order": "desc",
        "limit": 10
    }
)

Response

{
  "count": 156,
  "offset": 0,
  "limit": 10,
  "seriess": [
    {
      "id": "BOPGSTB",
      "title": "Trade Balance: Goods and Services, Balance of Payments Basis",
      "observation_start": "1992-01-01",
      "observation_end": "2023-06-01",
      "frequency": "Monthly",
      "units": "Millions of Dollars",
      "seasonal_adjustment": "Seasonally Adjusted",
      "popularity": 78
    }
  ]
}

fred/category/tags

Get the tags for a category.

URL: https://api.stlouisfed.org/fred/category/tags

Required Parameters

Parameter Type Description
api_key string 32-character API key
category_id integer Category ID

Optional Parameters

Parameter Type Default Description
file_type string xml xml or json
realtime_start date today YYYY-MM-DD
realtime_end date today YYYY-MM-DD
tag_names string - Semicolon-delimited tags
tag_group_id string - freq, gen, geo, geot, rls, seas, src
search_text string - Search tag names
limit integer 1000 1-1000
offset integer 0 Pagination offset
order_by string series_count series_count, popularity, created, name, group_id
sort_order string asc asc or desc

Tag Group IDs

ID Description
freq Frequency
gen General
geo Geography
geot Geography Type
rls Release
seas Seasonal Adjustment
src Source

Example

# Get frequency tags for Trade Balance category
response = requests.get(
    "https://api.stlouisfed.org/fred/category/tags",
    params={
        "api_key": API_KEY,
        "category_id": 125,
        "file_type": "json",
        "tag_group_id": "freq"
    }
)

Response

{
  "tags": [
    {"name": "monthly", "group_id": "freq", "series_count": 100},
    {"name": "quarterly", "group_id": "freq", "series_count": 45},
    {"name": "annual", "group_id": "freq", "series_count": 30}
  ]
}

fred/category/related_tags

Get related tags for a category.

URL: https://api.stlouisfed.org/fred/category/related_tags

Required Parameters

Parameter Type Description
api_key string 32-character API key
category_id integer Category ID
tag_names string Semicolon-delimited tag names

Optional Parameters

Parameter Type Default Description
file_type string xml xml or json
realtime_start date today YYYY-MM-DD
realtime_end date today YYYY-MM-DD
exclude_tag_names string - Tags to exclude
tag_group_id string - freq, gen, geo, geot, rls, seas, src
search_text string - Search tag names
limit integer 1000 1-1000
offset integer 0 Pagination offset
order_by string series_count Ordering field
sort_order string asc asc or desc

Example

# Get tags related to 'services' and 'quarterly' in Trade Balance category
response = requests.get(
    "https://api.stlouisfed.org/fred/category/related_tags",
    params={
        "api_key": API_KEY,
        "category_id": 125,
        "tag_names": "services;quarterly",
        "file_type": "json"
    }
)

Common Category IDs

ID Name
0 Root (all categories)
32991 Money, Banking, & Finance
10 Population, Employment, & Labor Markets
32992 National Accounts
1 Production & Business Activity
32455 Prices
32263 International Data
3008 U.S. Regional Data
33060 Academic Data
53 Gross Domestic Product
33490 Interest Rates
32145 Exchange Rates
12 Consumer Price Indexes (CPI)
2 Unemployment

Navigating Categories

def get_category_tree(api_key, category_id=0, depth=0, max_depth=2):
    """Recursively get category tree."""
    if depth > max_depth:
        return None

    # Get children
    response = requests.get(
        "https://api.stlouisfed.org/fred/category/children",
        params={
            "api_key": api_key,
            "category_id": category_id,
            "file_type": "json"
        }
    )
    data = response.json()

    tree = []
    for cat in data.get("categories", []):
        node = {
            "id": cat["id"],
            "name": cat["name"],
            "children": get_category_tree(api_key, cat["id"], depth + 1, max_depth)
        }
        tree.append(node)

    return tree

# Get first 2 levels of category tree
tree = get_category_tree(API_KEY, depth=0, max_depth=1)
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