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Sets the IAM access control policy for the specified Project.
CAUTION: This method will replace the existing policy, and cannot be used to append additional IAM settings.
NOTE: Removing service accounts from policies or changing their roles can render services completely inoperable. It is important to understand how the service account is being used before removing or updating its roles.
For additional information about resource (e.g. my-project-id) structure and identification, see Resource Names.
The following constraints apply when using setIamPolicy():
Project does not support allUsers and allAuthenticatedUsers as members in a Binding of a Policy.
The owner role can be granted to a user, serviceAccount, or a group that is part of an organization. For example, group@myownpersonaldomain.com could be added as an owner to a project in the myownpersonaldomain.com organization, but not the examplepetstore.com organization.
Service accounts can be made owners of a project directly without any restrictions. However, to be added as an owner, a user must be invited via Cloud Platform console and must accept the invitation.
A user cannot be granted the owner role using setIamPolicy(). The user must be granted the owner role using the Cloud Platform Console and must explicitly accept the invitation.
You can only grant ownership of a project to a member by using the Google Cloud console. Inviting a member will deliver an invitation email that they must accept. An invitation email is not generated if you are granting a role other than owner, or if both the member you are inviting and the project are part of your organization.
If the project is not part of an organization, there must be at least one owner who has accepted the Terms of Service (ToS) agreement in the policy. Calling setIamPolicy() to remove the last ToS-accepted owner from the policy will fail. This restriction also applies to legacy projects that no longer have owners who have accepted the ToS. Edits to IAM policies will be rejected until the lack of a ToS-accepting owner is rectified. If the project is part of an organization, you can remove all owners, potentially making the organization inaccessible.
Authorization requires the Google IAM permission resourcemanager.projects.setIamPolicy on the project
POST https://cloudresourcemanager.googleapis.com/v1/projects/{resource}:setIamPolicy
The URL uses gRPC Transcoding syntax.
Path parameters Parametersresource
string
REQUIRED: The resource for which the policy is being specified. See Resource names for the appropriate value for this field.
Request bodyThe request body contains data with the following structure:
JSON representation{
"policy": {
object (Policy)
},
"updateMask": string
} Fields policy
object (Policy)
REQUIRED: The complete policy to be applied to the resource. The size of the policy is limited to a few 10s of KB. An empty policy is a valid policy but certain Google Cloud services (such as Projects) might reject them.
updateMask
string (FieldMask format)
OPTIONAL: A FieldMask specifying which fields of the policy to modify. Only the fields in the mask will be modified. If no mask is provided, the following default mask is used:
paths: "bindings, etag"
This is a comma-separated list of fully qualified names of fields. Example: "user.displayName,photo".
If successful, the response body contains an instance of Policy.
Requires one of the following OAuth scopes:
https://www.googleapis.com/auth/cloud-platformhttps://www.googleapis.com/auth/cloudplatformprojectsFor more information, see the Authentication Overview.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-06-11 UTC.
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