diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8c6492c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+api/
diff --git a/api.sh b/api.sh
new file mode 100755
index 0000000..2617147
--- /dev/null
+++ b/api.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# The source CSV file.
+SOURCE_DATA=united-states.csv
+
+# Where we want our JSON files to go.
+OUTPUT_DIR=./api
+
+# Create the JSON directory.
+mkdir -p "$OUTPUT_DIR"
+
+# Iterate through each line in the CSV file.
+while read -r p; do
+	FIPS_VALUE=$(echo "$p" | cut -d "," -f 1)
+	GNIS_VALUE=$(echo "$p" | cut -d "," -f 2)
+	OUTPUT_FILE="$OUTPUT_DIR"/"$FIPS_VALUE".json
+	echo "{\"fips\":\"$FIPS_VALUE\",\"gnis\":\"$GNIS_VALUE\"}" > "$OUTPUT_FILE"
+done <$SOURCE_DATA