Errors

Authentication errors use this response shape:

json

{
  "ok": false,
  "error": "invalid_api_key"
}

Error	Status	Message
`account_missing`	400	Account missing.
`downgrade_invalid`	400	Downgrade invalid.
`entry_values_invalid`	400	Entry values invalid.
`github_primary_email_missing`	400	Github primary email missing.
`invalid`	400	Invalid.
`invalid_cart_price`	400	Invalid cart price.
`invalid_cart_quantity`	400	Invalid cart quantity.
`invalid_download_token`	400	Invalid download token.
`invalid_faq_config`	400	Invalid faq config.
`invalid_form_type`	400	Invalid form type.
`invalid_product_id`	400	Invalid product id.
`invalid_project_id`	400	A valid project identifier was not provided.
`invalid_share_token`	400	Invalid share token.
`invalid_state`	400	A valid connection-state value was not provided.
`invalid_status`	400	Invalid status.
`invalid_store_domain`	400	Invalid store domain.
`inventory_invalid`	400	Inventory invalid.
`missing_client_id`	400	Missing client id.
`missing_client_secret`	400	Missing client secret.
`missing_email`	400	Missing email.
`missing_provider_user_id`	400	Missing provider user id.
`missing_stripe_secret_key`	400	Missing stripe secret key.
`page_link_invalid`	400	Page link invalid.
`page_template_invalid_select_option`	400	Page template invalid select option.
`page_template_required_value_missing`	400	Page template required value missing.
`refresh_missing_access_token`	400	Refresh missing access token.
`shopify_import_options_invalid`	400	Shopify import options invalid.
`stripe_intent_missing_client_secret`	400	Stripe intent missing client secret.
`stripe_line_items_missing`	400	Stripe line items missing.
`stripe_session_missing_url`	400	Stripe session missing url.
`stripe_total_missing`	400	Stripe total missing.
`subscription_change_invalid`	400	Subscription change invalid.
`template_description_invalid`	400	Template description invalid.
`template_html_invalid`	400	Template html invalid.
`template_json_invalid`	400	Template json invalid.
`token_missing_access_token`	400	Token missing access token.
`variable_invalid`	400	Variable invalid.
`variable_type_invalid`	400	Variable type invalid.
`authorization_denied`	401	The ModuSell user denied the connection.
`invalid_api_key`	401	The key is missing, unknown, expired, revoked, or owned by an inactive developer account.
`invalid_authorization_code`	401	The callback code is missing, unknown, unapproved, or belongs to another API key.
`unauthorized`	401	The request is not authorized.
`access_denied`	403	Access denied.
`denied`	403	Denied.
`forbidden`	403	The authenticated caller is not allowed to perform this action.
`project_not_connected`	403	The API key has no active connection to the requested project.
`cart_item_not_found`	404	Cart item not found.
`connection_not_found`	404	The requested active key-to-project connection does not exist.
`file_not_found`	404	File not found.
`form_not_found`	404	Form not found.
`not_found`	404	Not found.
`original_order_not_found`	404	Original order not found.
`page_template_entry_not_found`	404	Page template entry not found.
`page_template_not_found`	404	Page template not found.
`page_template_variable_not_found`	404	Page template variable not found.
`project_not_found`	404	Project not found.
`shopify_import_not_found`	404	Shopify import not found.
`social_account_not_found`	404	Social account not found.
`submission_not_found`	404	Submission not found.
`subscription_not_found`	404	Subscription not found.
`template_not_found`	404	Template not found.
`authorization_code_used`	409	The one-time authorization code has already completed a connection.
`redirect_uri_required`	409	The developer account does not have a registered callback URL.
`authorization_code_expired`	410	The connection request expired before code exchange.
`attribute_lookup_failed`	500	Attribute lookup failed.
`claim_failed`	500	Claim failed.
`crypto_error`	500	Crypto error.
`db_error`	500	Db error.
`debug_error`	500	Debug error.
`failed`	500	Failed.
`faq_config_serialize_failed`	500	Faq config serialize failed.
`internal_error`	500	Internal error.
`invite_create_failed`	500	Invite create failed.
`invite_lookup_failed`	500	Invite lookup failed.
`invite_random_failed`	500	Invite random failed.
`invite_transaction_commit_failed`	500	Invite transaction commit failed.
`invite_transaction_failed`	500	Invite transaction failed.
`mousedown_start_failed`	500	Mousedown start failed.
`page_link_lookup_failed`	500	Page link lookup failed.
`page_template_commit_failed`	500	Page template commit failed.
`page_template_create_failed`	500	Page template create failed.
`page_template_delete_entries_failed`	500	Page template delete entries failed.
`page_template_delete_failed`	500	Page template delete failed.
`page_template_delete_values_failed`	500	Page template delete values failed.
`page_template_delete_variables_failed`	500	Page template delete variables failed.
`page_template_entries_list_failed`	500	Page template entries list failed.
`page_template_entry_create_failed`	500	Page template entry create failed.
`page_template_entry_delete_failed`	500	Page template entry delete failed.
`page_template_entry_lookup_failed`	500	Page template entry lookup failed.
`page_template_entry_update_failed`	500	Page template entry update failed.
`page_template_entry_values_delete_failed`	500	Page template entry values delete failed.
`page_template_entry_values_lookup_failed`	500	Page template entry values lookup failed.
`page_template_entry_values_save_failed`	500	Page template entry values save failed.
`page_template_lookup_failed`	500	Page template lookup failed.
`page_template_preview_failed`	500	Page template preview failed.
`page_template_schema_failed`	500	Page template schema failed.
`page_template_tx_failed`	500	Page template tx failed.
`page_template_update_failed`	500	Page template update failed.
`page_template_variable_create_failed`	500	Page template variable create failed.
`page_template_variable_delete_failed`	500	Page template variable delete failed.
`page_template_variable_delete_values_failed`	500	Page template variable delete values failed.
`page_template_variable_lookup_failed`	500	Page template variable lookup failed.
`page_template_variable_update_failed`	500	Page template variable update failed.
`page_template_variables_lookup_failed`	500	Page template variables lookup failed.
`page_templates_list_failed`	500	Page templates list failed.
`project_lookup_failed`	500	Project lookup failed.
`project_settings_failed`	500	Project settings failed.
`recaptcha_load_failed`	500	Recaptcha load failed.
`refresh_failed`	500	Refresh failed.
`role_lookup_failed`	500	Role lookup failed.
`settings_write_failed`	500	Settings write failed.
`shopify_connect_state_failed`	500	Shopify connect state failed.
`shopify_connection_lookup_failed`	500	Shopify connection lookup failed.
`shopify_connection_save_failed`	500	Shopify connection save failed.
`shopify_import_create_failed`	500	Shopify import create failed.
`shopify_import_list_failed`	500	Shopify import list failed.
`shopify_import_lookup_failed`	500	Shopify import lookup failed.
`shopify_import_schema_failed`	500	Shopify import schema failed.
`shopify_refresh_failed`	500	Shopify refresh failed.
`social_error`	500	Social error.
`social_user_create_failed`	500	Social user create failed.
`social_user_lookup_failed`	500	Social user lookup failed.
`stripe_parse_failed`	500	Stripe parse failed.
`stripe_request_failed`	500	Stripe request failed.
`stripe_verify_failed`	500	Stripe verify failed.
`template_draft_lookup_failed`	500	Template draft lookup failed.
`template_draft_save_failed`	500	Template draft save failed.
`time_format_failed`	500	Time format failed.
`token_exchange_failed`	500	Token exchange failed.
`user_create_failed`	500	User create failed.
`user_lookup_failed`	500	User lookup failed.
`missing`	Not specified	Missing.
`payment_method_unsupported`	Not specified	Payment method unsupported.

Status-code mappings beyond the authentication table, error response fields, and remediation guidance are omitted when not available in current endpoint specs or tests.