{"version":"2.1.268","anchor":"new-oauth-error-code-list-for-tokenauth-error-classificatio","canonical_anchor":"new-oauth-error-code-list-for-tokenauth-error-classificatio","heading":"New OAuth error code list for token\/auth error classification","tier":"internal","area":"Auth","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268\/e\/new-oauth-error-code-list-for-tokenauth-error-classificatio","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268","markdown":"### New OAuth error code list for token\/auth error classification\n\nNew internal list of standard OAuth error codes for classifying auth failures\n\n**Unclear.** The finding does not say where these codes are now used or what specific messages they produce.\n\n**What**\n\nA new list of standard OAuth (the protocol used for authentication\/login flows) error codes was added, including things like `invalid_request`, `invalid_grant`, `authorization_pending`, `expired_token`, `slow_down`, `invalid_client_metadata`, `insufficient_scope`, `invalid_target`, `method_not_allowed`, and `too_many_requests`.\n\n**Why**\n\nThis lets Claude Code recognize and classify a wider range of standard authentication error responses, which can lead to more accurate error handling and messaging when a login or token exchange fails.\n\n- Area: Auth\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}