Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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how can I set up cors in Kratos on Ory Cloud? I tried using the cli but didn't work

Hi <@U03FTN8P9EK>

If you are developing locally, then you should use the Ory CLI to create a tunnel which mirrors the Ory APIs on your localhost machine.
<https://www.ory.sh/docs/guides/cli/proxy-and-tunnel>

If you already deployed your application on a domain you own, then you need to setup a custom domain on your Ory project <https://www.ory.sh/docs/guides/custom-domains>

I already deployed, so I cant use Ory cloud for free?
Because to add a custom domain I need to upgrade my plan

You can use it but requires more work then to implement. It means you need to deploy the Ory Tunnel alongside your application due to CORS and cookie limitations on cross domain requests.