A SaaStr AI Agent API Report Card that evaluated 152 B2B software APIs found marketing platforms averaging 63.6 out of 100 while the overall average across all categories reached 72.
The report graded APIs on six criteria scored 0-10 each for a maximum of 100 points: API design, events and streaming support, authentication, rate limits, SDK quality and documentation, and agent readiness. Scores came from independent evaluations by Claude, GPT, and Gemini models.