Upload a new image or video asset to a Lightroom catalog using the two-step create-asset-then-upload-binary workflow, including chunked upload for files over 200MB
domain: lr.adobe.io · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Generate a new globally unique identifier without hyphens (per RFC-4122) to use as the asset_id
Create the asset record with PUT /v2/catalogs/{catalog_id}/assets/{asset_id}, sending a JSON body with subtype and payload.importSource fields (fileName, importedOnDevice set to the partner API key, importedBy, importTimestamp); expect a 201 Created response
Upload the binary file data with PUT /v2/catalogs/{catalog_id}/assets/{asset_id}/master, setting Content-Type to the file's media type
For files larger than 200MB, split the upload into parts and issue multiple PUT requests to the same master endpoint with Content-Range headers for each chunk; parallel chunk uploads are allowed
Handle a 412 Precondition Failed response as a duplicate-asset signal (the file's SHA-256 already matches an existing asset) and skip re-uploading it
Handle 413 (storage full) and 415 (content type mismatch) error responses by checking entitlement.storage before retrying and verifying the Content-Type header matches the actual file type
Known gotchas
The importedOnDevice field must be set to the partner application's API key so Lightroom clients correctly attribute the asset's origin
A single PUT to the master endpoint is capped at 200MB per invocation; larger files require the multi-request Content-Range chunking approach, not a single oversized request
A 404 on asset creation can mean the cached catalog_id is stale rather than a real not-found error; refresh it via GET /v2/catalog before retrying
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