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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Am I correct in thinking that I can use oathkeeper to just act as a proxy, that if the user isn't authorized then redirect them to hydra and if they are authorized generate a JWT and forward the request? It seems very flexible from all the options and want to know if it can just do the above?

Hello. Yes, you understand it correctly. You can use oauth2_introspection authenticator to achieve that

Can I get oathkeeper to use the same keys available from the hydra instance so I have a single point to obtain keys from?

I don't think there is any examples of this anywhere?

I can't see in the docs where you do the whole refresh tokens, accepting the callback etc