I spent some time this week running a complete inventory of public developer, API, and data portals across every Fortune 100 company. Combined apis.yml metadata across the api-evangelist network with web verification of every company that had no clear evidence in the index. The result surprised me a little, as I zoomed out beyond just developer portals. 83 of the Fortune 100 have a public developer, API, or data portal of some kind. That number is higher than I would have guessed if you had asked me cold. The API economy reaches deeper into corporate America than the “AWS, Stripe, Twilio, Shopify” narrative usually credits it for. But the number is also misleading, because “having a portal” covers a wide range of seriousness — and the gap between the portals that are designed for self-serve developers and the portals that are designed to keep developers out is wider than the headline rate suggests. You have to wonder what these portals say to agents? Every company below links to its portal (where one exists) and to its api-evangelist profile where I am tracking the API surface over time. Big Tech (12) Universal, mature, and the reference shape for what a developer portal looks like: Apple (profile) Microsoft (profile) Alphabet (Google) (profile) Amazon (profile) Meta Platforms (profile) Oracle (profile) IBM (profile) Cisco Systems (profile) HP (profile) Dell Technologies (profile) NVIDIA (profile) Intel (profile) Banking and Financial Services (20) The Open Banking, BaaS, and embedded-finance wave has put a developer portal in front of nearly every major US bank, insurer, and financial-data firm. These programs are larger and more mature than most public commentary reflects at first glance: JPMorgan Chase (profile) Citigroup (profile) Capital One (profile) Wells Fargo (profile) Bank of America (profile) American Express (profile) Morgan Stanley (profile) Goldman Sachs (profile) Prudential Financial (profile) TIAA (profile) MetLife (profile) AIG (profile) Allstate (profile) Liberty Mutual (profile) State Farm (profile) Progressive (profile) Nationwide (profile) Fannie Mae (profile) Freddie Mac (profile) StoneX Group (profile) Healthcare Payers and Providers (11) Most of these portals exist because of the CMS Patient Access rule and other interoperability mandates, not because the payer or provider wanted a developer ecosystem. They are FHIR-shaped and often documented through third-party aggregators (1upHealth, Onyx, Particle Health) rather than first-party, but still fit into my strategy at Naftiko: UnitedHealth Group (profile) Elevance Health (Anthem) (profile) Cigna (profile) Humana (profile) Centene (profile) HCA Healthcare (profile) CVS Health (profile) Merck (profile) Cardinal Health (profile) McKesson (profile) Bristol Myers Squibb (profile) Retail and Commerce (13) A mix of self-serve developer programs and supplier or trading-partner portals — the line between them is fuzzier here than in most other sectors: Walmart (profile) Target (profile) Best Buy (profile) Kroger (profile) Walgreens Boots Alliance (profile) Home Depot (profile) Lowe’s (profile) Albertsons (profile) Costco Wholesale (supplier portal) (profile) TJX (supplier portal) (profile) TD SYNNEX (ION API) (profile) Tyson Foods (trading partner) (profile) Sysco (profile) Airlines and Logistics (5) Air cargo and shipping have had developer programs longer than most other categories,…