> ## Documentation Index > Fetch the complete documentation index at: https://docs.ascii.dev/llms.txt > Use this file to discover all available pages before exploring further. # Save a named snapshot > Freeze a box's current state under a name (`box snapshot ` in the CLI). Answers `202` immediately with the snapshot in `saving`; a running box takes a fresh capture first, which can run minutes. Poll `GET /named-snapshots/{name}` until the status settles at `ready` or `failed`. Reusing one of your existing names replaces that snapshot's artifact once the new save is ready. ## OpenAPI ````yaml openapi/box-v1.yaml POST /named-snapshots openapi: 3.1.0 info: title: Box Public API v1 version: 1.0.0 description: > Public JSON API for creating, operating, prompting, observing, and exposing Box sandboxes from backend services, CI jobs, hosted workers, and Box automation products. The v1 reference intentionally documents the developer integration surface only. Dashboard billing actions are not part of v1. servers: - url: https://ascii.dev/api/box/v1 security: - BoxBearerAuth: [] tags: - name: Box description: >- Unified Box account, setup, lifecycle, prompting, event history, desktop access, and SSH operations. paths: /named-snapshots: post: tags: - Box summary: Save a named snapshot description: >- Freeze a box's current state under a name (`box snapshot ` in the CLI). Answers `202` immediately with the snapshot in `saving`; a running box takes a fresh capture first, which can run minutes. Poll `GET /named-snapshots/{name}` until the status settles at `ready` or `failed`. Reusing one of your existing names replaces that snapshot's artifact once the new save is ready. operationId: saveNamedSnapshot requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/NamedSnapshotSaveRequest' responses: '202': description: Save accepted and running in the background. content: application/json: schema: $ref: '#/components/schemas/NamedSnapshotSavingResponse' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' '409': description: >- `named_snapshot_limit` when you already keep the maximum of 10 named snapshots; remove one first. `save_in_progress` when a save under this name is already running; wait for it to settle rather than retrying immediately. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' components: schemas: NamedSnapshotSaveRequest: type: object required: - boxId - name properties: boxId: type: string description: The box whose current state to freeze. name: type: string pattern: ^[a-z0-9][a-z0-9-]{0,62}$ description: >- Name to save under. 1-63 lowercase letters, digits, or dashes, starting with a letter or digit. Reusing one of your existing names replaces that snapshot's artifact. `latest`, `tree`, `pull`, `rm`, `save`, `current`, `self`, and `new` are reserved. NamedSnapshotSavingResponse: allOf: - $ref: '#/components/schemas/SuccessBase' - type: object required: - status - snapshot properties: type: type: string const: snapshot.named.saving status: type: string const: saving snapshot: $ref: '#/components/schemas/NamedSnapshot' ErrorEnvelope: type: object required: - ok - type - status - code - message - error - requestId properties: ok: type: boolean examples: - false type: type: string examples: - box.error status: type: integer examples: - 409 code: type: string examples: - provider_not_configured message: type: string examples: - Prompting is locked until Codex is configured on the Agents page. requestId: type: string examples: - req_01HX... error: type: object required: - code - message - status properties: code: type: string message: type: string status: type: integer details: type: object additionalProperties: true SuccessBase: type: object required: - ok - type properties: ok: type: boolean examples: - true type: type: string description: Stable success envelope discriminator added by v1. NamedSnapshot: type: object description: >- A named snapshot: a frozen copy of a box's disk at one moment, saved under a name you pick. Independent of the source box's later life — the box can change, stop, or be deleted and the named snapshot still deploys. Named snapshots never expire; re-saving a name replaces its artifact. required: - name - status - sourceBoxId - createdAt properties: name: type: string pattern: ^[a-z0-9][a-z0-9-]{0,62}$ description: The user-chosen handle, unique within your account. status: type: string enum: - saving - ready - failed description: >- `saving` while the capture and pin are in flight (a live source box takes a fresh snapshot first, which can run minutes), `ready` when deployable, `failed` if the save did not complete (see `error`; save again to retry). error: type: string description: Failure reason. Only present when `status` is `failed`. sourceBoxId: type: string description: The box this snapshot was saved from (display only). snapshotId: type: string description: >- The frozen artifact behind the name. Present once `status` is `ready`. Accepted by `GET /api/box/snapshots/{snapshotId}/tree` to browse its files. type: type: string description: Box type the snapshot was saved from. Deploys default to it. sizeBytes: type: integer description: Restored content size of the frozen state, in bytes. createdAt: type: string format: date-time responses: BadRequest: description: Invalid request body or parameters. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' examples: invalid: value: ok: false type: box.error status: 400 code: invalid_json message: Request body must be valid JSON. error: code: invalid_json message: Request body must be valid JSON. status: 400 requestId: req_01HX... Unauthorized: description: Missing or invalid bearer token. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' examples: unauthorized: value: ok: false type: box.error status: 401 code: unauthorized message: Unauthorized error: code: unauthorized message: Unauthorized status: 401 requestId: req_01HX... NotFound: description: Resource not found. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' securitySchemes: BoxBearerAuth: type: http scheme: bearer bearerFormat: box_api_key description: >- Box bearer token in the form `box_...`. Service API keys authenticate Box operations. ````