PicoBerry MCP Server

Generate 3D models, images, and animations for game and 3D workflows 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. Generated assets are drafts — useful for prototyping and iteration, and can be reviewed or refined for your project.

📖 Full reference: API + MCP docs · PicoBerry API

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

Tools

How generation works

Generation is asynchronous:

1. generate_3d_from_text({ prompt }) → returns an asset { id }.
2. wait_for_asset({ asset_id: id }) → polls until taskStatus === 2 (succeeded).
3. 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")  → { 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:

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