Mint a presigned download for an available attachment

GET

/v1/attachments/{id}/download

curl --request GET \
  --url https://api.aerandil.com/v1/attachments/2489E9AD-2EE2-8E00-8EC9-32D5F69181C0/download \
  --header 'Authorization: Bearer <token>'

• Production API

Mint a short-lived presigned S3 GET for an available attachment. The bytes stream directly from object storage; the API only signs the URL.

Scope: objects:read.

Requires AERANDIL_OBJECT_STORE_ENABLED — 501 otherwise.

Authorizations

• aerandil_oauth
  objects:read

Parameters

Path Parameters

id

required

string format: uuid

Object id (UUID v7, server-generated at create time).

Responses

200

A presigned download URL and its expiry.

Media typeapplication/json

object

expires_at

required

string format: date-time

method

required

string

url

required

string

Example^generated

{
  "expires_at": "2026-04-15T12:00:00Z",
  "method": "example",
  "url": "example"
}

Headers

Cache-Control

string

Allowed value: no-store

Always no-store — live data is never cacheable.

403

Missing the objects:read scope.

Media typeapplication/json

Structured error wrapper. Every non-2xx response from any Aerandil endpoint serialises to this shape; the HTTP status carries the failure class (4xx/5xx), the body adds a stable code for programmatic dispatch plus a human-readable message.

object

error

required

object

code

required

Stable, programmatic error code (e.g. unauthorized, forbidden, not_found, invalid_body, invalid_url, precondition_failed, no_secondary_key). Clients dispatch on code, not on the message (which may be localised or contextualised in future versions).

string

instance_id

Request-id correlation handle echoed on the request-id response header — support teams correlate without scraping logs.

string

message

required

Human-readable explanation of the failure.

string

parameters

Per-error structured detail. The shape varies by code (e.g. forbidden_action carries {"action": "..."}; precondition_failed carries {"current_version": N}).

Example^generated

{
  "error": {
    "code": "example",
    "instance_id": "example",
    "message": "example",
    "parameters": "example"
  }
}

404

No such attachment for this tenant.

Media typeapplication/json

Structured error wrapper. Every non-2xx response from any Aerandil endpoint serialises to this shape; the HTTP status carries the failure class (4xx/5xx), the body adds a stable code for programmatic dispatch plus a human-readable message.

object

error

required

object

code

required

Stable, programmatic error code (e.g. unauthorized, forbidden, not_found, invalid_body, invalid_url, precondition_failed, no_secondary_key). Clients dispatch on code, not on the message (which may be localised or contextualised in future versions).

string

instance_id

Request-id correlation handle echoed on the request-id response header — support teams correlate without scraping logs.

string

message

required

Human-readable explanation of the failure.

string

parameters

Per-error structured detail. The shape varies by code (e.g. forbidden_action carries {"action": "..."}; precondition_failed carries {"current_version": N}).

Example^generated

{
  "error": {
    "code": "example",
    "instance_id": "example",
    "message": "example",
    "parameters": "example"
  }
}

409

attachment_not_available — only an available attachment can be downloaded.

Media typeapplication/json

Structured error wrapper. Every non-2xx response from any Aerandil endpoint serialises to this shape; the HTTP status carries the failure class (4xx/5xx), the body adds a stable code for programmatic dispatch plus a human-readable message.

object

error

required

object

code

required

Stable, programmatic error code (e.g. unauthorized, forbidden, not_found, invalid_body, invalid_url, precondition_failed, no_secondary_key). Clients dispatch on code, not on the message (which may be localised or contextualised in future versions).

string

instance_id

Request-id correlation handle echoed on the request-id response header — support teams correlate without scraping logs.

string

message

required

Human-readable explanation of the failure.

string

parameters

Per-error structured detail. The shape varies by code (e.g. forbidden_action carries {"action": "..."}; precondition_failed carries {"current_version": N}).

Example^generated

{
  "error": {
    "code": "example",
    "instance_id": "example",
    "message": "example",
    "parameters": "example"
  }
}

501

Object storage not enabled (AERANDIL_OBJECT_STORE_ENABLED unset).

Media typeapplication/json

Structured error wrapper. Every non-2xx response from any Aerandil endpoint serialises to this shape; the HTTP status carries the failure class (4xx/5xx), the body adds a stable code for programmatic dispatch plus a human-readable message.

object

error

required

object

code

required

Stable, programmatic error code (e.g. unauthorized, forbidden, not_found, invalid_body, invalid_url, precondition_failed, no_secondary_key). Clients dispatch on code, not on the message (which may be localised or contextualised in future versions).

string

instance_id

Request-id correlation handle echoed on the request-id response header — support teams correlate without scraping logs.

string

message

required

Human-readable explanation of the failure.

string

parameters

Per-error structured detail. The shape varies by code (e.g. forbidden_action carries {"action": "..."}; precondition_failed carries {"current_version": N}).

Example^generated

{
  "error": {
    "code": "example",
    "instance_id": "example",
    "message": "example",
    "parameters": "example"
  }
}