list_sectors

Returns the complete sector and industry classification used across Dataflow: every sector with its industries nested beneath it, each with the numeric id the other tools filter on. Call this before list_companies to turn a sector name into the sector_id or industry_id it takes. This taxonomy is Modular Finance's own - it is not GICS, ICB or NACE, and its names do not map onto them one-for-one (there are 13 sectors, including 'Trading & Goods' and 'Discretionaries', and a 'Finance' sector spanning both 'Large bank' and 'Investment Trust'), so guessing an id rather than reading it here will select the wrong companies. Sector and industry 0 ('Unknown') are real classifications carried by real companies and are included, so that filtering across every sector accounts for every company. The list is small and static enough to fetch once per conversation. Each company row returned by search_securities and list_companies reports its own sector_id and industry_id from this same taxonomy. Successful calls may consume Dataflow credits per returned sector; nested industries do not add units.