{"name":"CLAUDE_CODE_CLIENT_DATA_URL","slug":"claude-code-client-data-url","family":"env","title":"Environment variables","noun":"environment variable","description":"`--client-data-url` or `CLAUDE_CODE_CLIENT_DATA_URL` loads a signed per-model configuration from Anthropic, and Claude Code will not start if it fails","description_source":"entry","described_by":{"version":"2.1.283","anchor":"new-client-data-url-flag-claude-code-client-data-url-loa"},"presence":{"first_seen":"2.1.283","removed_in":null,"in_current_build":true,"newest_mined":"2.1.283","builds":1,"mined_builds":126,"first_cited":{"version":"2.1.283","released_at":"2026-09-25 18:46:11","spans":1}},"aliases":[],"entries":[{"version":"2.1.283","anchor":"new-client-data-url-flag-claude-code-client-data-url-loa","heading":"New --client-data-url flag loads a signed configuration for your model","line":"`--client-data-url` or `CLAUDE_CODE_CLIENT_DATA_URL` loads a signed per-model configuration from Anthropic, and Claude Code will not start if it fails","released_at":"2026-09-25 18:46:11","reason":"found in this entry's text, named in this entry"}],"entries_total":1,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"CLAUDE_CODE_CLIENT_CERT","slug":"claude-code-client-cert","description":"Path to client certificate file for mTLS authentication"},{"name":"CLAUDE_CODE_CLIENT_KEY","slug":"claude-code-client-key","description":"Path to client private key file for mTLS authentication"},{"name":"CLAUDE_CODE_CLIENT_KEY_PASSPHRASE","slug":"claude-code-client-key-passphrase","description":"Passphrase for encrypted CLAUDE\\_CODE\\_CLIENT\\_KEY (optional)"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/env\/claude-code-client-data-url","family_url":"https:\/\/changelogs.core-directive.com\/reference\/env.json"}