---
title: "Save an uploaded file (step 3 of 3)"
method: POST
path: "/v1/mailboxes/{mailbox_id}/files"
tags: ["Files"]
---

# Save an uploaded file (step 3 of 3)

`POST /v1/mailboxes/{mailbox_id}/files`

## Request

- Base URL: `https://api.revdoku.com`
- URL: `https://api.revdoku.com/v1/mailboxes/{mailbox_id}/files`
- Auth: HTTP bearer

Saves the uploaded blob at path. An existing path gets a new version.

## Path parameters

- `mailbox_id` string, required

## Request body

- SaveUploadedFileRequest
  - `path` string, required: Destination path. An existing path receives a new version. Paths under _email/ return EMAIL_PATH_READ_ONLY.
  - `signed_blob_id` string, required: data.signed_id from POST /v1/direct_uploads.
  - `name` string: Display name; defaults to the last path segment.
  - `role` 'source' | 'reference' | 'generated' | 'agent_output' | 'export' | 'artifact'
  - `existing_file_policy` 'replace' | 'skip'
  - `expected_mailbox_version` string: Mailbox version_id from your last read. A different current version returns MAILBOX_VERSION_CONFLICT and saves nothing.
  - `account_id` string
  - `reason` string, nullable: Optional purpose for this action. AI agents should explain intentional reads and changes when known; omit when unknown. Do not include secrets, file contents, or transcripts.

## Response `200`

Existing file kept

- object
  - `success` true, required
  - `data` SavedFile, required
    - `file` MailboxFile, required
      - `id` string, required
      - `mailbox_id` string
      - `basename` string
      - `path` string, required
      - `role` string
      - `created_by_system` string
      - `deleted` boolean
      - `version_reasons` FileVersionReason[]
        - `version_id` string
        - `reason` string
        - `created_by_id` string
        - `version_number` integer
        - `created_at` string, date-time
      - `lock` object
      - `current_file_version` FileVersion
        - `id` string, required
        - `file_id` string, required
        - `name` string
        - `mime_type` string
        - `sha256` string
        - `reason` string, nullable
        - `created_by_system` string
        - `deleted` boolean: True for the version that records a deletion.
        - `ready` boolean
        - `has_text` boolean
        - `version_number` integer, required
        - `byte_size` integer
        - `created_at` string, date-time
        - `created_by` FileActor
          - `id` string
          - `name` string
          - `email` string
        - `updated_by` FileActor
          - `id` string
          - `name` string
          - `email` string
        - `created_by_agent` object
        - `updated_by_agent` object
        - `created_by_api_key` object
        - `updated_by_api_key` object
        - `read` boolean
        - `read_at` string, date-time, nullable
        - `read_by` FileActor
          - `id` string
          - `name` string
          - `email` string
        - `read_by_api_key` FileKey
          - `id` string
          - `label` string
          - `token_type` string
      - `created_by` FileActor
        - `id` string
        - `name` string
        - `email` string
      - `created_at` string, date-time
      - `updated_at` string, date-time
      - `deleted_at` string, date-time
      - `created_by_agent` object
      - `updated_by_agent` object
      - `created_by_api_key` object
      - `updated_by_api_key` object
      - `read` boolean
      - `read_at` string, date-time, nullable
      - `read_by` FileActor
        - `id` string
        - `name` string
        - `email` string
      - `read_by_api_key` FileKey
        - `id` string
        - `label` string
        - `token_type` string
    - `version` FileVersion, required
      - `id` string, required
      - `file_id` string, required
      - `name` string
      - `mime_type` string
      - `sha256` string
      - `reason` string, nullable
      - `created_by_system` string
      - `deleted` boolean: True for the version that records a deletion.
      - `ready` boolean
      - `has_text` boolean
      - `version_number` integer, required
      - `byte_size` integer
      - `created_at` string, date-time
      - `created_by` FileActor
        - `id` string
        - `name` string
        - `email` string
      - `updated_by` FileActor
        - `id` string
        - `name` string
        - `email` string
      - `created_by_agent` object
      - `updated_by_agent` object
      - `created_by_api_key` object
      - `updated_by_api_key` object
      - `read` boolean
      - `read_at` string, date-time, nullable
      - `read_by` FileActor
        - `id` string
        - `name` string
        - `email` string
      - `read_by_api_key` FileKey
        - `id` string
        - `label` string
        - `token_type` string
    - `created` boolean, required
    - `skipped` FileUploadSkip
      - `path` string
      - `name` string
      - `reason` string
      - `code` string
      - `input_index` integer
      - `details` object
    - `duplicate` boolean

## Other responses

- `201`: Created
- `default`: Request failed. See error.code. Any 429 or 503 response with Retry-After (for example 503 EMAIL_LABELING_PENDING or 503 EMAIL_INDEX_BUILDING): wait that many seconds, then try the read again. 429 EMAIL_SEND_RATE_LIMITED has no Retry-After. Never retry EMAIL_LOOP_DETECTED.

---

[API](https://skmtc.dev/revdoku/apis/revdoku-api.md) · [All operations](https://skmtc.dev/revdoku/apis/revdoku-api/llms.txt) · [OpenAPI document](https://skmtc.dev/revdoku/apis/revdoku-api/revisions/3ff4e2540a8b?raw)