> ## Documentation Index > Fetch the complete documentation index at: https://docs.ndi.nace.ai/llms.txt > Use this file to discover all available pages before exploring further. # list_domains > List every domain visible to the caller. Cost class: cacheable. Returns the platform-owned domains (``generic`` and the curated verticals, all published and selectable) and the calling tenant's own rows. ## OpenAPI ````yaml /openapi.json get /v1/domains openapi: 3.1.0 info: description: >- Document intelligence: parse, split, classify, extract, and ground files, or build a searchable workspace. Authenticate with ``X-API-Key``. title: NDI Platform API version: 0.1.0 servers: - url: https://ndi-api.nace.ai security: [] tags: [] paths: /v1/domains: get: tags: - domains summary: list_domains description: >- List every domain visible to the caller. Cost class: cacheable. Returns the platform-owned domains (``generic`` and the curated verticals, all published and selectable) and the calling tenant's own rows. operationId: list_domains_v1_domains_get parameters: - description: 'Filter by ownership: `platform` (standard) or `tenant` (yours).' in: query name: owner required: false schema: anyOf: - enum: - platform - tenant type: string - type: 'null' description: 'Filter by ownership: `platform` (standard) or `tenant` (yours).' title: Owner - description: Filter by lifecycle status. in: query name: status required: false schema: anyOf: - enum: - draft - published type: string - type: 'null' description: Filter by lifecycle status. title: Status - description: >- Opaque cursor from a previous page's `next_cursor`. Omit for the first page. in: query name: cursor required: false schema: anyOf: - type: string - type: 'null' description: >- Opaque cursor from a previous page's `next_cursor`. Omit for the first page. title: Cursor - description: Rows per page. in: query name: limit required: false schema: default: 50 description: Rows per page. maximum: 200 minimum: 1 title: Limit type: integer responses: '200': content: application/json: schema: $ref: '#/components/schemas/Page_DomainSummary_' description: Successful Response '504': content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' description: Gateway Timeout default: content: application/json: example: error: code: invalid_request detail: null message: >- Request body has extra fields that this operation does not accept. request_id: req-01j9k2n3p4q5r6s7t8v9 retryable: false schema: $ref: '#/components/schemas/ErrorEnvelope' description: >- Typed error envelope used by every 4xx and 5xx. ``error.code`` distinguishes the failure; HTTP status is a consequence of the code. security: - APIKeyHeader: [] components: schemas: Page_DomainSummary_: additionalProperties: false properties: items: items: $ref: '#/components/schemas/DomainSummary' title: Items type: array next_cursor: anyOf: - type: string - type: 'null' description: Opaque; null means the last page. title: Next Cursor total_count: description: Exact, and filtered by the caller's access predicate. title: Total Count type: integer required: - items - total_count title: Page[DomainSummary] type: object ErrorEnvelope: description: Every non-2xx body on ``/v1``. example: error: code: invalid_request detail: null message: Request body has extra fields that this operation does not accept. request_id: req-01j9k2n3p4q5r6s7t8v9 retryable: false properties: error: $ref: '#/components/schemas/Error' required: - error title: ErrorEnvelope type: object DomainSummary: additionalProperties: false description: A domain without its vocabularies, for listings. properties: class_count: title: Class Count type: integer display_name: title: Display Name type: string domain_id: format: uuid title: Domain Id type: string owner: enum: - platform - tenant title: Owner type: string parent_slug: anyOf: - type: string - type: 'null' description: >- Inheritance lineage for platform domains that extend a base vocabulary. title: Parent Slug selectable: description: True once published; a workspace may only pin a published version. title: Selectable type: boolean slug: title: Slug type: string status: enum: - draft - published title: Status type: string version: title: Version type: integer required: - domain_id - slug - display_name - owner - version - status - class_count - selectable title: DomainSummary type: object Error: description: The error object, per spec 12 §1.8. properties: code: $ref: '#/components/schemas/ErrorCode' detail: anyOf: - additionalProperties: true type: object - type: 'null' description: Structured payload, when the code carries one. title: Detail message: description: Human- and model-readable; says what to do differently. title: Message type: string request_id: description: Per-request correlation id; matches the ``X-Request-Id`` header. title: Request Id type: string retryable: description: Whether retrying the identical request could succeed. title: Retryable type: boolean required: - code - message - retryable - request_id title: Error type: object ErrorCode: description: |- Every error the ``/v1`` surface can return. Clients must treat this as an **open** enum: a new member is an additive change (spec 12 §9), and a client that crashes on an unknown code makes every future error a breaking change. enum: - invalid_request - unsupported_file_type - file_too_large - invalid_schema - invalid_sql - invalid_path_prefix - command_not_permitted - batch_too_large - domain_validation_failed - default_label_required - wait_required_for_zero_retention - workspace_not_found - file_not_found - job_not_found - upload_not_found - node_not_found - schema_not_found - domain_not_found - session_not_found - access_label_not_found - path_conflict - schema_version_conflict - access_label_name_taken - workspace_name_taken - access_label_in_use - upload_expired - file_not_ingested - workspace_deleting - workspace_not_deletable - ingestion_in_progress - job_not_cancellable - confirmation_required - domain_not_published - domain_in_use - reserved_domain_slug - kg_not_built - kg_build_in_progress - session_busy - range_not_satisfiable - result_expired - access_denied - access_backstop_violation - access_mode_not_implemented - rate_limited - concurrency_limit_reached - quota_exceeded - corrupt_file - zero_byte_file - encrypted_file - parse_failed - ocr_failed - conversion_failed - sheetless_workbook - unplayable_media - unclassified_pages - job_cancelled - job_timeout - upstream_unavailable - internal_error - unauthorized - not_implemented title: ErrorCode type: string securitySchemes: APIKeyHeader: in: header name: X-API-Key type: apiKey ````