Hi @exnihil,
You can verify your access token by checking the signature with the public key available at https://{yourdomain}/.well-known/jwks.json
.
Additionally, you can validate your access token using any of the libraries listed here: JSON Web Token Libraries - jwt.io.
For more details, I suggest checking out our documentation on validating access tokens: Validate Access Tokens.
(Reference: How to validate Access_Token)
Thanks,
Rueben