AWS Amplify
The frontend library that handles Cognito token storage, silent refresh, and request signing so the app doesn't build that logic by hand.
August 29, 20261 min read1 / 15
A frontend library for talking to Cognito (and other AWS services) without writing the plumbing yourself.
- Token storage and refresh. Tokens land in local storage; when one is close to expiring, Amplify silently uses the refresh token to get a new one, no user-facing interruption.
- Request signing. When Amplify calls other AWS services on the user's behalf, it signs the request with SigV4, a scheme that stamps each request with a hash only someone holding the right credentials could produce, so AWS can tell a genuine call from a forged one.
Where this showed up
- The frontend that never touches a password: token handling and request signing.