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Luma Agents
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API Reference
Files

Upload a file

POST/files

Upload a file to your namespace, then reference it from a generation via ImageRef.file_id (as source, image_ref[], video.start_frame, keyframes, and so on). Two upload modes share this endpoint, selected by Content-Type:

  • multipart/form-data — send the bytes inline in the file part. Best for small files (subject to an inline size cap; larger files must use the presigned flow). The returned file is already pending ingest.

  • application/json — request a presigned upload. The response upload envelope tells you where to PUT the bytes; afterward call POST /files/{file_id}/complete to start ingest. Use this for larger files.

Body Parameters JSON
mime_type: string

MIME type of the bytes you will upload.

minLength: 1, maxLength: 256
size_bytes: number

Exact size in bytes of the object you will PUT. Up to 5 GiB (the S3 single-PUT ceiling).

minimum: 1
expires_at: optional string

Optional TTL. After this time Luma may automatically delete the file and reclaim its bytes.

format: date-time
filename: optional string

Optional original filename to record.

maxLength: 512
purpose: optional FilePurpose

How the file is intended to be used in a generation. input is the primary subject (e.g. the source image for an edit); reference is style/content guidance.

One of the following:
"input"
"reference"
user_id: optional string

Optional opaque end-user tag for abuse attribution. Mirrors the user_id field on POST /generations.

maxLength: 256
Returns
CreateFileResponse = object { id, file, state, upload }

Result of POST /files. In the multipart (inline) flow upload is null and the file is already pending ingest. In the presigned (JSON) flow upload carries the PUT envelope and the file stays pending until you call POST /files/{file_id}/complete. Top-level id and state are conveniences that mirror file.id and file.state; the full record is always under file.

id: string

File identifier.

format: uuid
file: File { id, created_at, mime_type, 8 more }

A file in the caller's namespace.

id: string

File identifier, referenced as ImageRef.file_id.

format: uuid
created_at: string

Creation timestamp.

format: date-time
mime_type: string

MIME type of the stored bytes (for example, image/jpeg).

purpose: FilePurpose

How the file is intended to be used in a generation. input is the primary subject (e.g. the source image for an edit); reference is style/content guidance.

One of the following:
"input"
"reference"
size_bytes: number

Size of the stored object in bytes.

state: FileState

Lifecycle state of an uploaded file. pending until bytes are received and the ingest pipeline runs; ready once it can be referenced from a generation; failed if ingest/moderation rejected it; deleted after a soft-delete.

One of the following:
"pending"
"ready"
"failed"
"deleted"
deleted_at: optional string

Soft-delete timestamp, if the file was deleted.

format: date-time
expires_at: optional string

TTL set at upload, if any. After this time Luma may automatically delete the file and reclaim its bytes — you don't need to call DELETE yourself.

format: date-time
failure_reason: optional string

Human-readable reason when state is failed.

filename: optional string

Original filename supplied at upload, if any.

user_id: optional string

The opaque end-user tag supplied at upload, echoed back unchanged. Abuse-attribution only; not an access-control primitive.

state: FileState

Lifecycle state of an uploaded file. pending until bytes are received and the ingest pipeline runs; ready once it can be referenced from a generation; failed if ingest/moderation rejected it; deleted after a soft-delete.

One of the following:
"pending"
"ready"
"failed"
"deleted"
upload: optional PresignedUpload { expires_at, method, url, headers }

Where to PUT the file bytes for a presigned (JSON) upload. Issue an HTTP PUT of the raw bytes to url with the given headers, then call POST /files/{file_id}/complete.

expires_at: string

When the presigned URL expires.

format: date-time
method: string

HTTP method to use for the upload — always PUT.

url: string

Presigned S3 URL to PUT the bytes to.

format: uri
headers: optional map[string]

Headers that must be sent with the PUT request.

Upload a file

curl https://agents.lumalabs.ai/v1/files \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $LUMA_AGENTS_API_KEY" \
    -d '{
          "mime_type": "x",
          "size_bytes": 1
        }'
201 example
{
  "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
  "file": {
    "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
    "created_at": "2019-12-27T18:11:19.117Z",
    "mime_type": "mime_type",
    "purpose": "input",
    "size_bytes": 0,
    "state": "pending",
    "deleted_at": "2019-12-27T18:11:19.117Z",
    "expires_at": "2019-12-27T18:11:19.117Z",
    "failure_reason": "failure_reason",
    "filename": "filename",
    "user_id": "user_id"
  },
  "state": "pending",
  "upload": {
    "expires_at": "2019-12-27T18:11:19.117Z",
    "method": "method",
    "url": "https://example.com",
    "headers": {
      "foo": "string"
    }
  }
}
Returns Examples
201 example
{
  "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
  "file": {
    "id": "182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e",
    "created_at": "2019-12-27T18:11:19.117Z",
    "mime_type": "mime_type",
    "purpose": "input",
    "size_bytes": 0,
    "state": "pending",
    "deleted_at": "2019-12-27T18:11:19.117Z",
    "expires_at": "2019-12-27T18:11:19.117Z",
    "failure_reason": "failure_reason",
    "filename": "filename",
    "user_id": "user_id"
  },
  "state": "pending",
  "upload": {
    "expires_at": "2019-12-27T18:11:19.117Z",
    "method": "method",
    "url": "https://example.com",
    "headers": {
      "foo": "string"
    }
  }
}