@picoberry/mcp-server

PicoBerry MCP Server

Generate game-ready 3D models, images, and animations from any MCP client — Claude Code, Cursor, Claude Desktop, Cline — with no HTTP glue. A thin wrapper over the PicoBerry /v1 API, so you get PicoBerry's multi-engine pipeline directly inside your agent. Several 3D and image engines sit behind one API; call list_models for the live set and each engine's cost.

There's no separate subscription for the MCP or the API. Generation spends the same prepaid PicoBerry credits as the web app, per engine, at rates you can read with list_models before you spend anything. (Using the API does require a completed purchase — see Get an API key.)

Install

No install needed — run it with npx:

// Claude Code:  .mcp.json   ·   Claude Desktop:  claude_desktop_config.json
{
  "mcpServers": {
    "picoberry": {
      "command": "npx",
      "args": ["-y", "@picoberry/mcp-server"],
      "env": {
        "PICOBERRY_API_KEY": "pb_live_xxxxxxxxxxxxxxxx"
      }
    }
  }
}

Cursor uses the same shape in ~/.cursor/mcp.json.

Get an API key

Sign in at https://picoberry.ai, open the API Keys tab in your dashboard, and hit Create key. The key is shown once — copy it immediately and treat it like a password.

API access needs a completed purchase: a subscription or a one-off credit pack. A purchase entitles you permanently — you don't need a current subscription. (An active paid subscription works too, of course.)

Environment variables

Var	Required	Default	Notes
PICOBERRY_API_KEY	✅	—	pb_live_...
PICOBERRY_API_BASE	—	https://api.picoberry.ai	leave unset unless you were given a different host

Tools

Tool	What it does
list_models	Engines + credit cost for a category (3d / image / remesh / texture / animate). Call before generating — don't hardcode engines.
list_animation_presets	Animation preset ids (engine-specific), with optional substring filter.
get_credits	Current credit balance + plan.
generate_image	Text → image (+ optional reference image URLs).
generate_3d_from_text	Text → 3D model (GLB).
generate_3d_from_image	Image → 3D model. Single: image_url or local image_path. Multi-view (2–4 views, higher fidelity): image_urls or image_paths, ordered [front, left, back, right] — tripo*/meshy6/hunyuan-3.x only.
remesh	Retopologize an existing 3D asset → new asset.
texture	Re-texture (PBR) an existing 3D asset → new asset.
animate	Auto-rig + animate an existing 3D character → new asset.
get_asset	Status + result URLs for one asset.
wait_for_asset	Poll until an asset finishes (or times out), then return it.
list_my_assets	Browse your generated assets.
download_asset	Export a completed 3D asset (glb / fbx / obj) → signed URL.

How generation works

Generation is asynchronous:

• generate_3d_from_text({ prompt }) → returns an asset { id }.
• wait_for_asset({ asset_id: id }) → polls until taskStatus === 2 (succeeded).
• Read the result URL from files.model (GLB) or files.image (PNG).

taskStatus: 0 pending · 1 processing · 2 succeeded · 3 failed. Result URLs are signed and short-lived — download promptly. Errors come back with an actionable message (e.g. an unknown engine returns the list of valid names).

Example (in an agent)

"Make a low-poly treasure chest, retopo it to 3k tris, and give me a Unity FBX."

list_models(category="3d")                         → pick an engine
generate_3d_from_text(prompt="low-poly treasure chest, game ready")  → { id: A }
wait_for_asset(asset_id=A)                          → taskStatus 2
remesh(asset_id=A, polycount=3000)                  → { id: B }
wait_for_asset(asset_id=B)
download_asset(asset_id=B, format="fbx", texture_preset="unity")  → signed URL

Use it alongside Blender MCP

Run this next to blender-mcp and the agent can generate with PicoBerry, then import into Blender in one flow:

{
  "mcpServers": {
    "picoberry": { "command": "npx", "args": ["-y", "@picoberry/mcp-server"], "env": { "PICOBERRY_API_KEY": "pb_live_..." } },
    "blender":   { "command": "uvx", "args": ["blender-mcp"] }
  }
}

Develop

npm install
npm run build      # tsc → dist/
PICOBERRY_API_KEY=pb_live_... npm start

Release

Run Actions → Publish → Run workflow (or push a v* tag). It publishes to npm and then to the official MCP registry, in that order — the registry validates by fetching the package's npm metadata and matching its mcpName against server.json's name, so npm has to land first. A guard step checks every invariant (name/version agreement, namespace casing, version not already on npm) before anything is published, because npm versions are immutable and a failed half-publish burns the number.

Bump version in both package.json and server.json (version and packages[0].version) — the guard fails the run if they disagree.

One-time setup — no secrets. Both publishes authenticate over the workflow's GitHub OIDC token (id-token: write). There is nothing to store or rotate.

The only step is telling npm to trust this workflow. On npmjs.com go to @picoberry/mcp-server → Settings → Trusted publishing → GitHub Actions and enter:

Field	Value
Organization or user	UModeler
Repository	picoberry-mcp
Workflow filename	publish.yml
Environment name	(leave empty)
Allowed actions	npm publish

The workflow filename must match exactly — it is part of what npm verifies.

The MCP registry needs no setup at all: mcp-publisher exchanges the Actions OIDC token, and the registry grants io.github.<repository_owner>/* from the token's repository_owner claim. That covers io.github.UModeler/picoberry-mcp and avoids the interactive browser login (which additionally requires org Owner).

Trusted Publishing needs npm >= 11.5.1, so the workflow runs on Node 24 (npm 11.x). Node 22 still bundles npm 10.9 and would fail — the node-version pin is load-bearing. A guard step fails the run early if the runner ever ships an older npm.

The namespace is compared byte-exactly — io.github.UModeler/..., matching the GitHub org's login. A lowercased io.github.umodeler/... is rejected 403.

After publishing, claim the Glama listing — unclaimed servers get limited discoverability, and awesome-mcp-servers gates its PRs on a Glama badge in CI.

License

MIT