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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Hello. If i am using authenticator to protect some endpoint is there a way i can include subject to the header of the authenticated request, so protected service receive subject in header after it was authenticated by oathkeeper?

Yes you can do so with the mutator:
```
      mutators:
        - handler: id_token```
:slightly_smiling_face:
In e.g. FastAPI you can then get it using the `JWTUserIdentityMiddleware` :slightly_smiling_face: