{"issuer":"https://api.justcall.io/v2.1/oauth","authorization_endpoint":"https://app.justcall.io/apex/mcp","registration_endpoint":"https://api.justcall.io/v2.1/oauth/register","token_endpoint":"https://api.justcall.io/v2.1/oauth/token","response_types_supported":["code"],"grant_types_supported":["authorization_code"],"token_endpoint_auth_methods_supported":["client_secret_post"],"scopes_supported":["openid"],"response_modes_supported":["query"],"code_challenge_methods_supported":["S256"]}