Token introspection is indeed primarily meant for first-party or internal use and the endpoint shouldn't be exposed publicly. However, if you need to validate an access token for a third-party, you can use the OAuth 2.0 token introspection feature. This allows a client to query the authorization server to determine the validity and other metadata of an access token. Here's an example of how to use token introspection to check whether an access token is valid using the Ory SDK:

javascript import { Configuration, OAuth2Api } from "@ory/client"      const ory = new OAuth2Api(     new Configuration({       basePath: `https://${process.env.ORY_PROJECT_SLUG}.<http://projects.oryapis.com|projects.oryapis.com>`,       accessToken: process.env.ORY_API_KEY,     }),   )      export async function introspectToken(accessToken: string) {     const { data } = await ory.introspectOAuth2Token({ token: accessToken })     data.active // true or false   }

In this code,

introspectToken

is a function that takes an access token as a parameter and uses the

introspectOAuth2Token

method from the Ory SDK to check the token's validity. The

data.active

property in the response will be

true

if the token is valid and

false

otherwise. Please note that this method should be used responsibly and securely, considering the sensitivity of access tokens. Sources: - [OAuth 2.0 token introspection](https://www.ory.sh/docs/hydra/guides/oauth2-token-introspection) - [Revoking JSON Web Tokens](https://www.ory.sh/docs/oauth2-oidc/jwt-access-token#revoking-json-web-tokens)

You're correct, providing an ORY_API_KEY to a third-party application is not recommended due to security reasons. In a typical OAuth 2.0 flow, a third-party application doesn't need to validate the access token itself. Instead, it just sends the access token with each request to your server. Your server then validates the token. If a third-party application needs to verify if an access token is valid, it should make a request to your server with the token. Your server can then perform the token introspection and respond back to the third-party application with the validity of the token. Here's a simplified example:

javascript app.get('/verify-token', async (req, res) => {   const token = req.headers.authorization;   const { data } = await ory.introspectOAuth2Token({ token: token });   res.send({ active: data.active }); });

In this example, a third-party application can make a GET request to the

/verify-token

endpoint on your server with the access token in the

Authorization

header. Your server then introspects the token and responds with the validity of the token. Remember, the actual implementation may vary based on your application's architecture and security requirements.

New message text here