To force logout a user using Ory Hydra or Kratos, you can follow the guidelines provided in the extracts. Here's how you can approach it for both Hydra and Kratos: ### Using Ory Hydra For Ory Hydra, you can initiate and complete user logout at the Ory OAuth2 & OpenID provider and initiate OpenID Connect Front- / Back-channel logout by using the endpoint:

GET /oauth2/sessions/logout

This endpoint supports both OpenID Connect Front- and Back-channel Enabled Logout. The back-channel logout is performed asynchronously and does not affect the logout flow. This operation does not require authentication. For more details on OpenID Connect Front- and Back-channel logout, you can refer to the official OpenID specifications: - [Front-channel Logout](https://openid.net/specs/openid-connect-frontchannel-1_0.html) - [Back-channel Logout](https://openid.net/specs/openid-connect-backchannel-1_0.html) (Source: [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api)) ### Using Ory Kratos For Ory Kratos, there are different approaches depending on the type of application you are working with (e.g., server-rendered browser applications, single-page applications (SPA), or native API applications). #### Server-rendered Browser Applications You can generate a logout URL for a given Ory Session cookie and open the logout URL in the browser. Here's an example using Express:

typescript
import { Configuration, FrontendApi } from "@ory/client"  
import { Request, Response } from "express"  
  
const frontend = new FrontendApi(  
 new Configuration({  
 basePath: "<https://playground.projects.oryapis.com/>",  
 }),  
)  
  
const route = (req: Request, res: Response) => {  
 frontend  
 .createBrowserLogoutFlow({ cookie: req.header("cookie") })  
 .then(({ data }) => {  
 console.log(data.logout_url) // The logout URL  
 console.log(data.logout_token) // The logout token  
  
 // You can render the logout URL like so:  
 // <a href="{{data.logout_url}}>Logout</a>  
  
 // Or call the logout token:  
 // kratos.updateLogoutFlow(data.logout_token).then(() => {  
 // Logged out  
 // })  
 })  
}

(Source: [Kratos Self-service Flows - User logout](https://www.ory.sh/docs/kratos/self-service/flows/user-logout)) #### Single Page Application (SPA) For SPAs, you can call the logout URL using an AJAX request. Here's an example using React:

To force logout a user using Ory Hydra or Kratos, you can follow the guidelines provided in the extracts. Here's how you can approach it for both Hydra and Kratos: ### Using Ory Hydra For Ory Hydra, you can initiate and complete user logout at the Ory OAuth2 & OpenID provider and initiate OpenID Connect Front- / Back-channel logout by using the endpoint:

GET /oauth2/sessions/logout

This endpoint supports both OpenID Connect Front- and Back-channel Enabled Logout. The back-channel logout is performed asynchronously and does not affect the logout flow. This operation does not require authentication. For more details on OpenID Connect Front- and Back-channel logout, you can refer to the official OpenID specifications: - [Front-channel Logout](https://openid.net/specs/openid-connect-frontchannel-1_0.html) - [Back-channel Logout](https://openid.net/specs/openid-connect-backchannel-1_0.html) (Source: [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api)) ### Using Ory Kratos For Ory Kratos, there are different approaches depending on the type of application you are working with (e.g., server-rendered browser applications, single-page applications (SPA), or native API applications). #### Server-rendered Browser Applications You can generate a logout URL for a given Ory Session cookie and open the logout URL in the browser. Here's an example using Express:

typescript import { Configuration, FrontendApi } from "@ory/client"   import { Request, Response } from "express"      const frontend = new FrontendApi(    new Configuration({    basePath: "<https://playground.projects.oryapis.com/>",    }),   )      const route = (req: Request, res: Response) => {    frontend    .createBrowserLogoutFlow({ cookie: req.header("cookie") })    .then(({ data }) => {    console.log(data.logout_url) // The logout URL    console.log(data.logout_token) // The logout token       // You can render the logout URL like so:    // <a href="{{data.logout_url}}>Logout</a>       // Or call the logout token:    // kratos.updateLogoutFlow(data.logout_token).then(() => {    // Logged out    // })    })   }

(Source: [Kratos Self-service Flows - User logout](https://www.ory.sh/docs/kratos/self-service/flows/user-logout)) #### Single Page Application (SPA) For SPAs, you can call the logout URL using an AJAX request. Here's an example using React:

typescript import { Configuration, FrontendApi } from "@ory/client"      const frontend = new FrontendApi(    new Configuration({    basePath: "<http://localhost:4000>", // Use your local Ory Tunnel URL    baseOptions: {    withCredentials: true,    },    }),   )      export function Logout() {    const handleLogout = async () => {    try {    // Create a "logout flow" in Ory Identities    const { data: flow } = await frontend.createBrowserLogoutFlow()    // Use the received token to "update" the flow and thus perform the logout    await frontend.updateLogoutFlow({    token: flow.logout_token,    })    } catch (error) {    // The user could not be logged out    }       // Logout was successful    }       return <button onClick={handleLogout}>Logout</button>   }

(Source: [Kratos Self-service Flows - User logout for SPA](https://www.ory.sh/docs/kratos/self-service/flows/user-logout#single-page-application

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