Markets
SaaStr AI Agent API Report Card: 144 B2B APIs Graded — Stripe Tops at 95, Workday Fails at 38, Average Score 71/100
SaaStr expanded its AI Agent API Report Card from 75 to 144 graded B2B APIs across six dimensions (API design, events/streaming, auth/security, rate limits, SDKs/docs, agent readiness), with an average score of 71/100 (C+). Top performers: Stripe (95), Slack (87), Adyen (83), Linear (80). Bottom tier: Marketo (50), Gainsight (48), Workday (38). The key insight: 'API-first vendors gain share while legacy vendors with human-UI focus bleed out' — agent readiness is becoming the new competitive moat.
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