AWS Security Token Service MCP Server Integration

AWS Security Token Service (STS) is a foundational web service from Amazon Web Services (AWS) that enables you to request temporary, limited-privilege security credentials for identity and access management. These credentials, which consist of an access key, a secret key, and a security token, are valid for a specified duration—typically ranging from minutes to hours—and are automatically invalidated upon expiration. STS is the central mechanism for enabling identity federation and cross-account access within the AWS ecosystem. It serves a critical role in enterprise environments by allowing administrators to grant users from external identity providers (like corporate Active Directory via SAML or identity pools via web identity) secure, on-demand access to AWS resources without creating permanent IAM users in each account. Common use cases include providing temporary access for mobile applications via Cognito, enabling single sign-on (SSO) for enterprise users, and allowing developers or automated systems to assume roles for specific, time-bound tasks in other AWS accounts or regions.