Returns a set of temporary credentials for an Amazon Web Services account or IAM user. The
credentials consist of an access key ID, a secret access key, and a security token.
Typically, you use
GetSessionToken if you want to use MFA to protect
programmatic calls to specific Amazon Web Services API operations like Amazon EC2
MFA-enabled IAM users would need to call
GetSessionToken and submit an MFA
code that is associated with their MFA device. Using the temporary security credentials
that are returned from the call, IAM users can then make programmatic calls to API
operations that require MFA authentication. If you do not supply a correct MFA code, then
the API returns an access denied error. For a comparison of
with the other API operations that produce temporary credentials, see Requesting
Temporary Security Credentials and Comparing the
Amazon Web Services STS API operations in the IAM User Guide.
No permissions are required for users to perform this operation. The purpose of the
sts:GetSessionToken operation is to authenticate the user using MFA. You
cannot use policies to control authentication operations. For more information, see
Permissions for GetSessionToken in the
IAM User Guide.
GetSessionToken operation must be called by using the long-term Amazon Web Services
security credentials of the Amazon Web Services account root user or an IAM user. Credentials that are
created by IAM users are valid for the duration that you specify. This duration can range
from 900 seconds (15 minutes) up to a maximum of 129,600 seconds (36 hours), with a default
of 43,200 seconds (12 hours). Credentials based on account credentials can range from 900
seconds (15 minutes) up to 3,600 seconds (1 hour), with a default of 1 hour.
The temporary security credentials created by
GetSessionToken can be used
to make API calls to any Amazon Web Services service with the following exceptions:
You cannot call any IAM API operations unless MFA authentication information is included in the request.
You cannot call any STS API except
We recommend that you do not call
GetSessionToken with Amazon Web Services account
root user credentials. Instead, follow our best practices by
creating one or more IAM users, giving them the necessary permissions, and using IAM
users for everyday interaction with Amazon Web Services.
The credentials that are returned by
GetSessionToken are based on
permissions associated with the user whose credentials were used to call the operation. If
GetSessionToken is called using Amazon Web Services account root user credentials, the
temporary credentials have root user permissions. Similarly, if
GetSessionToken is called using the credentials of an IAM user, the
temporary credentials have the same permissions as the IAM user.
For more information about using
GetSessionToken to create temporary
credentials, go to Temporary
Credentials for Users in Untrusted Environments in the
IAM User Guide.