Trying to write a quick wrapper to add items to the new #HomeAssistant TODO lists a la todo.sh. The CURL syntax seems to be:
curl -s \
-H "Authorization: Bearer $HA_KEY" \
-H "Content-Type: application/json" \
-d "{\"entity_id\": \"$HA_LIST\", \"item\": \"$HA_ITEM\"}" \
"$HA_URL/api/services/todo/add_item"
Where $HA_LIST is the entity ID of the list and $HA_ITEM is the text of the new item, $HA_KEY is the script token, and $HA_URL is the Home Assistant URL.