diff --git a/message_ix_models/tools/bgs.py b/message_ix_models/tools/bgs.py
new file mode 100644
index 0000000000..847efbdc8d
--- /dev/null
+++ b/message_ix_models/tools/bgs.py
@@ -0,0 +1,20 @@
+"""Tools for British Geological Survey Data.
+
+.. todo::
+
+   - Fetch data from https://www.bgs.ac.uk/mineralsuk/statistics/
+     world-mineral-statistics/world-mineral-statistics-data-download/
+     world-mineral-statistics-data/, in particular for commodity = [Alumina, Aluminum]
+     and all periods/regions.
+
+     This leads to query URLs like::
+
+        https://www.bgs.ac.uk/wp-json/bgsfeed/v1/minerals/items
+          ?year=1970-01-01T00:00:00.000Z/2023-01-01T00:00:00.000Z
+          &country_trans=
+          &bgs_commodity_trans=alumina%aluminium, primary
+          &bgs_statistic_type_trans=Production
+          &response=csv
+
+   - Transform data as required by :mod:`.model.material`.
+"""
diff --git a/message_ix_models/tools/genisim.py b/message_ix_models/tools/genisim.py
new file mode 100644
index 0000000000..736cb3b995
--- /dev/null
+++ b/message_ix_models/tools/genisim.py
@@ -0,0 +1,7 @@
+"""Tools for GeniSim data.
+
+.. todo::
+
+   - Fetch data from https://www.genisim.com/aluminum/smelters/smelters.htm
+   - Transform data as required by :mod:`.model.material`.
+"""
diff --git a/message_ix_models/tools/iai.py b/message_ix_models/tools/iai.py
new file mode 100644
index 0000000000..b6e86ca388
--- /dev/null
+++ b/message_ix_models/tools/iai.py
@@ -0,0 +1,26 @@
+"""Tools for International Aluminum Institute data.
+
+.. todo::
+
+   - Fetch data from URLS like::
+
+         https://international-aluminium.org/statistics/
+         metallurgical-alumina-refining-fuel-consumption/
+         ?publication=metallurgical-alumina-refining-fuel-consumption
+         &filter=%7B%22row%22%3Anull%2C%22group%22%3Anull%2C%22multiGroup%22%3A%5B2%5D
+         %2C%22dateRange%22%3A%22annually%22%2C%22monthFrom%22%3Anull%2C%22monthTo%22
+         %3Anull%2C%22quarterFrom%22%3A1%2C%22quarterTo%22%3A4%2C%22yearFrom%22%3A2023
+         %2C%22yearTo%22%3A2023%2C%22multiRow%22%3A%5B19%2C20%2C21%2C22%2C23%5D%2C
+         %22columns%22%3A%5B49%2C50%2C51%2C52%2C53%2C54%2C55%5D%2C%22activeChartIndex
+         %22%3A0%2C%22activeChartType%22%3A%22pie%22%7D
+
+         https://international-aluminium.org/statistics/
+         metallurgical-alumina-refining-energy-intensity/
+         ?filter=%7B%22row%22%3A85%2C%22group%22%3Anull%2C%22multiGroup%22%3A%5B%5D%2C
+         %22dateRange%22%3A%22annually%22%2C%22monthFrom%22%3Anull%2C%22monthTo%22
+         %3Anull%2C%22quarterFrom%22%3A1%2C%22quarterTo%22%3A4%2C%22yearFrom%22%3A1985
+         %2C%22yearTo%22%3A2023%2C%22multiRow%22%3A%5B%5D%2C%22columns%22%3A%5B%5D%2C
+         %22activeChartIndex%22%3A0%2C%22activeChartType%22%3A%22line%22%7D
+
+   - Transform data as required by :mod:`.model.material`.
+"""