Generating

Generate a 3D model

Produces a model. This is the slow one — the builder plans the model and constructs it cube by cube, which takes minutes rather than seconds.

carrierBlockId decides directional on its own when given.

POST/packs/{pack}/models

Path parameters

packstringrequired

The pack's slug, as returned by the packs endpoints.

Body

promptstringrequired

What to build.

namestring

Your label. Falls back to the prompt.

carrierKindstringdefault "item"

How it's placed in game.

Options: item, full, partial

directionalboolean

Whether it faces the way you placed it.

carrierBlockIdstring

A specific vanilla block to carry it.

referenceIdstring

A reference image already uploaded in the Studio. There is no API endpoint to upload one yet.

useStyleGuidebooleandefault true

Follow the pack's style guide — its palette, its notes and its reference pictures. Defaults to true, so a pack with a style guide produces assets that match it without this field. Send false for one asset that should deliberately not match. A pack with no style guide, or one switched off, ignores this either way.

Response · 202

Accepted. The work runs asynchronously — poll job until it leaves generating.

idstringrequired

The asset's name within the pack.

kindstringrequired

Which store the generated asset lands in.

Options: texture, model, font, sound

statusstringrequired

Always generating — nothing is finished when this returns.

packstringrequired

The pack it was written into.

jobstringrequired

Poll this at GET /jobs/{job} until it leaves generating.

Error codes

Branch on error.code, never on the message.

invalid_request400

Something in the body or query is wrong. message says what.

invalid_api_key401

The key isn't one of ours, or it has been revoked.

missing_api_key401

No Authorization: Bearer header was sent.

wrong_key_kind401

An MCP key sent to the REST API, or an API key sent to the MCP server. Each only opens its own.

insufficient_credits402

Not enough AI Credits to run this. Nothing was started or charged.

asset_limit_reached403

The pack is at its asset limit.

forbidden403

Valid key, but not permitted to do this in this pack.

plan_required403

The key is valid, but its account is on Starter. The API needs a paid plan.

not_found404

No such pack, asset or job.