When Marsh McLennan established a core APIs team in April of 2021, one of the first priorities was to create a set of API standards for the organization. But after blending together industry exemplars, RFCs, internal best practices and the occasional meme or two, the forty-six page document that resulted didn’t lead to the API revolution we’d expected. Focusing on closely integrating the standards with OpenAPI specification led to increased adoption across the internal developer community. Come and learn how the team used the OpenAPI Specification to drive standards compliance, improve collaboration and allow for easy maintenance and iteration of the standards over time.