IAMSpy is a library that leverages the Z3 theorem prover to analyze AWS Identity and Access Management (IAM) policies. The tool enables users to query IAM policies to determine whether specific actions are permitted or denied under given conditions. The library aims to simplify the development of IAM-related tooling by providing programmatic access to policy analysis capabilities. It utilizes formal verification techniques through the Z3 prover to evaluate policy logic and access decisions. IAMSpy serves as both a practical tool for IAM policy analysis and a resource for documenting IAM behavior patterns and edge cases observed in AWS environments. This documentation aspect helps the security community better understand IAM policy evaluation nuances and potential security implications.