> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flashduty.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Create signed file URLs

> Create short-lived signed URLs to download or preview a presented file.

## Restrictions

| Aspect      | Value                                                         |
| ----------- | ------------------------------------------------------------- |
| Rate limits | **1,000 requests/minute**; **50 requests/second** per account |
| Permissions | None — any valid `app_key` can call this operation            |

## Usage

* Both URLs expire after `expires_in` seconds (300). Sign again to get fresh URLs.
* Returned URLs are relative — prepend `https://api.flashcat.cloud` before use, then follow them with `GET /safari/artifact/stream`.
* The signed token is bound to the calling account and the app\_key owner's identity, so a leaked URL does not work for another account or member.


## OpenAPI

````yaml /api-reference/safari.openapi.en.json post /safari/artifact/sign
openapi: 3.1.0
info:
  title: Flashduty Open API
  description: >-
    Public HTTP API for the Flashduty AI SRE platform — skills, MCP servers
    (connectors), A2A agents, and sessions. Every operation is authenticated
    with an `app_key` query parameter issued from the Flashduty console.
  version: 1.0.0
servers:
  - url: https://api.flashcat.cloud
    description: Flashduty Open API
security:
  - AppKeyAuth: []
tags:
  - name: AI SRE/Skills
    description: AI SRE agent skill management.
  - name: AI SRE/MCP servers
    description: MCP (Model Context Protocol) server management.
  - name: AI SRE/A2A agents
    description: A2A (agent-to-agent) remote agent management.
  - name: AI SRE/Sessions
    description: AI SRE agent session history — list, inspect, and export transcripts.
  - name: AI SRE/Automations
  - name: AI SRE/Knowledge
  - name: AI SRE/Artifacts
    description: >-
      AI SRE artifact gallery — publish, browse, and publicly share
      agent-produced files.
paths:
  /safari/artifact/sign:
    post:
      tags:
        - AI SRE/Artifacts
      summary: Create signed file URLs
      description: Create short-lived signed URLs to download or preview a presented file.
      operationId: artifact-read-sign
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ArtifactSignRequest'
            example:
              file_id: pf_SdhEA5fbZJGnHzwrNJMMSB
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/ResponseEnvelope'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/SignedURLs'
              example:
                request_id: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
                data:
                  download_url: >-
                    /safari/artifact/stream?mode=download&t=cGZfU2RoRUE1ZmJaSkduSHp3ck5KTU1TQnxzZXNzX1ZDYlZQWnJxOVlveUJ1OHNOQ21xVXl8MjQ1MTAwMjc1MTEzMXwyNDc2NDQ0MjEyMTMxfDB8MHwxNzg4NTI5NjI2NTU0.hPQHab0MBNbnrHYwc6VwDJbGonIamfWUr0yeSmLHYAs
                  preview_url: >-
                    /safari/artifact/stream?mode=preview&t=cGZfU2RoRUE1ZmJaSkduSHp3ck5KTU1TQnxzZXNzX1ZDYlZQWnJxOVlveUJ1OHNOQ21xVXl8MjQ1MTAwMjc1MTEzMXwyNDc2NDQ0MjEyMTMxfDB8MHwxNzg4NTI5NjI2NTU0.hPQHab0MBNbnrHYwc6VwDJbGonIamfWUr0yeSmLHYAs
                  expires_in: 300
                  name: sk-hynix-q2-2026-report.html
                  size: 18996
                  content_type: text/html
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      security:
        - AppKeyAuth: []
components:
  schemas:
    ArtifactSignRequest:
      type: object
      description: Request signed download/preview URLs for a presented file.
      properties:
        file_id:
          type: string
          description: Presented-file ID (`pf_` prefix) to sign.
        share_token:
          type: string
          description: >-
            Optional session share-link token. Needed only when the caller
            reaches the file through a shared session link rather than account
            membership.
      required:
        - file_id
    ResponseEnvelope:
      type: object
      description: >-
        Standard response envelope used by every Flashduty public API. On
        success `data` contains the endpoint-specific payload and `error` is
        absent. On failure `error` is present and `data` is absent. `request_id`
        is always present and is also mirrored in the `Flashcat-Request-Id`
        response header.
      properties:
        request_id:
          type: string
          description: >-
            Unique ID for this request. Mirrored in the Flashcat-Request-Id
            header. Include it when reporting issues.
          example: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
        error:
          $ref: '#/components/schemas/DutyError'
        data:
          description: Endpoint-specific payload. See each operation's 200 response schema.
      required:
        - request_id
    SignedURLs:
      type: object
      description: Short-lived signed URLs for downloading or previewing a file.
      properties:
        download_url:
          type: string
          description: >-
            Relative URL (`/safari/artifact/stream?...`) that serves the file as
            an attachment. Prepend the API base `https://api.flashcat.cloud`
            before use; expires with `expires_in`.
        preview_url:
          type: string
          description: Same as `download_url` but served inline for browser preview.
        expires_in:
          type: integer
          description: Validity of both URLs in seconds (300).
        name:
          type: string
          description: File name including extension.
        size:
          type: integer
          description: File size in bytes.
          format: int64
        content_type:
          type: string
          description: MIME type of the file.
      required:
        - download_url
        - preview_url
        - expires_in
        - name
        - size
        - content_type
    DutyError:
      type: object
      description: >-
        Error payload inside the response envelope. Present only on non-2xx
        responses.
      properties:
        code:
          $ref: '#/components/schemas/ErrorCode'
        message:
          type: string
          description: >-
            Human-readable error message, localized by the caller's
            Accept-Language. May contain field names, IDs, or other context from
            the failing request.
          example: The specified parameter template_id is not valid.
      required:
        - code
        - message
    ErrorResponse:
      type: object
      description: Response envelope for errors. `error` is required; `data` is absent.
      properties:
        request_id:
          type: string
          example: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
          description: >-
            Unique trace ID of this request; include it when reporting issues so
            logs can be located.
        error:
          $ref: '#/components/schemas/DutyError'
      required:
        - request_id
        - error
    ErrorCode:
      type: string
      description: >-
        Flashduty error code enum. Every failed API response sets `error.code`
        to one of these stable wire strings. HTTP status is informational — the
        authoritative signal is the enum value.


        | Code | HTTP | Meaning |

        |---|---|---|

        | `OK` | 200 | Reserved — not returned on real errors. |

        | `InvalidParameter` | 400 | A required parameter is missing or failed
        validation. |

        | `BadRequest` | 400 | Generic 400 used when no more specific code fits.
        |

        | `InvalidContentType` | 400 | The `Content-Type` header is not
        `application/json`. |

        | `ResourceNotFound` | 400 | The referenced resource does not exist.
        Note: returned as HTTP 400, not 404 (historical choice). |

        | `NoLicense` | 400 | The feature is license-gated and no active license
        was found. |

        | `ReferenceExist` | 400 | Deletion blocked — other entities still
        reference this resource. |

        | `Unauthorized` | 401 | `app_key` is missing, invalid, or expired. |

        | `BalanceNotEnough` | 402 | Billing-gated operation with insufficient
        account balance. |

        | `AccessDenied` | 403 | Authenticated but lacking the permission
        required for this operation. |

        | `RouteNotFound` | 404 | The request URL path is not a known route. |

        | `MethodNotAllowed` | 405 | The HTTP method is not allowed on this
        otherwise-known path. |

        | `UndonedOrderExist` | 409 | An outstanding billing order blocks this
        new one. Wait and retry. |

        | `RequestLocked` | 423 | Operation temporarily locked due to repeated
        failures. |

        | `EntityTooLarge` | 413 | Request body exceeds the configured max size.
        |

        | `RequestTooFrequently` | 429 | Rate limit hit — API-global,
        per-account, or per-integration. |

        | `RequestVerifyRequired` | 428 | Second-factor verification required
        but not supplied. |

        | `DangerousOperation` | 428 | High-risk operation requires MFA
        verification. |

        | `InternalError` | 500 | Unhandled server-side error. Include
        `request_id` in the bug report. |

        | `ServiceUnavailable` | 503 | A backend dependency is unavailable. Try
        again later. |
      enum:
        - OK
        - InvalidParameter
        - BadRequest
        - InvalidContentType
        - ResourceNotFound
        - NoLicense
        - ReferenceExist
        - Unauthorized
        - BalanceNotEnough
        - AccessDenied
        - RouteNotFound
        - MethodNotAllowed
        - UndonedOrderExist
        - RequestLocked
        - EntityTooLarge
        - RequestTooFrequently
        - RequestVerifyRequired
        - DangerousOperation
        - InternalError
        - ServiceUnavailable
      x-enumDescriptions:
        OK: Reserved — not returned on real errors.
        InvalidParameter: A required parameter is missing or failed validation.
        BadRequest: Generic 400 used when no more specific code fits.
        InvalidContentType: The `Content-Type` header is not `application/json`.
        ResourceNotFound: >-
          The referenced resource does not exist. Note: returned as HTTP 400,
          not 404 (historical choice).
        NoLicense: The feature is license-gated and no active license was found.
        ReferenceExist: Deletion blocked — other entities still reference this resource.
        Unauthorized: '`app_key` is missing, invalid, or expired.'
        BalanceNotEnough: Billing-gated operation with insufficient account balance.
        AccessDenied: Authenticated but lacking the permission required for this operation.
        RouteNotFound: The request URL path is not a known route.
        MethodNotAllowed: The HTTP method is not allowed on this otherwise-known path.
        UndonedOrderExist: An outstanding billing order blocks this new one. Wait and retry.
        RequestLocked: Operation temporarily locked due to repeated failures.
        EntityTooLarge: Request body exceeds the configured max size.
        RequestTooFrequently: Rate limit hit — API-global, per-account, or per-integration.
        RequestVerifyRequired: Second-factor verification required but not supplied.
        DangerousOperation: High-risk operation requires MFA verification.
        InternalError: Unhandled server-side error. Include `request_id` in the bug report.
        ServiceUnavailable: A backend dependency is unavailable. Try again later.
      example: InvalidParameter
  responses:
    BadRequest:
      description: Invalid request — usually a missing or malformed parameter.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          examples:
            missingParameter:
              summary: Missing required parameter
              value:
                request_id: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
                error:
                  code: InvalidParameter
                  message: The specified parameter skill_id is not valid.
    Unauthorized:
      description: Missing or invalid app_key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          examples:
            missingAppKey:
              value:
                request_id: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
                error:
                  code: Unauthorized
                  message: You are unauthorized.
    TooManyRequests:
      description: Rate limit hit. Either the global API limit or a per-account limit.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          examples:
            rateLimited:
              value:
                request_id: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
                error:
                  code: RequestTooFrequently
                  message: Request too frequently.
    ServerError:
      description: Unexpected server-side error. Include the request_id when reporting.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          examples:
            internal:
              value:
                request_id: 01HK8XQE3Z7JM2NTFQ5YJ8P9R4
                error:
                  code: InternalError
                  message: >-
                    We encountered an internal error, and it has been reported.
                    Please try again later.
  securitySchemes:
    AppKeyAuth:
      type: apiKey
      in: query
      name: app_key
      description: >-
        App key issued from the Flashduty console. Required on every public API
        call. Keep it secret — it grants the same access as the owning account.

````