GraphQL is a query language for APIs that has been increasingly adopted by web developers since its specification was open sourced in 2015. The GraphQL framework lets API clients tailor data requests by using queries that return JSON objects described using GraphQL Schema. We present initial results of an exploratory empirical study with the goal of characterizing GraphQL Schemas in open code repositories and package registries. Our first approach identifies over 20 thousand GraphQL-related projects in publically accessible repositories hosted by GitHub. Our second, and complementary, approach uses package registries to select 30 GraphQL “reference” packages (the ones with the highest dependency counts), and then finds their 90 thousand dependent packages (and the related repositories in GitHub, GitLab, and Bitbucket). In addition, over 2 thousand schema files were loaded into the GraphQL.js reference implementation to conduct a detailed analysis of the schema information. Our study provides insights into the usage of different schema constructs, the number of distinct types and the most popular types in schemas, as well as the presence of cycles in schemas.