Illustmaker v4.0/v4.1 — Gradient Mesh, Brand Kits, Live Share + Viewer Comments. MCP expanded to 97 methods
ASI Inc. (HQ: Setagaya, Tokyo; CEO: Yusuke Saiki) has updated its AI-first vector graphics editor Illustmaker to v4.0. The release adds bilinear-interpolated gradient mesh, brand kits (palette + fonts + asset URLs) stored anonymously, and read-only live share URLs with 3-second polling. The MCP HTTP API has been expanded from 84 to 93 methods. v4.1 then added viewer-side spatial comments for mode='comment' share links.
What's new in v4.0
1. Gradient mesh (bilinear interpolation)
Specify 4 corner colors, or a full N×M color grid, and the server interpolates bilinearly into a smooth 2D color gradient — rendered as 576–3,600 micro polygons.
illust.add_mesh_gradient—{session, x, y, w, h, cols?, rows?, detail?, corners?, colors?}- detail (8–60) controls smoothness. Great for design backgrounds, ambient effects, voluminous fills.
- Also available via GUI: editor "AI" menu → "Gradient mesh."
2. Brand kits
Save palette + fonts + asset URLs together as a brand kit. Anonymous owner_fp (sha256 of ip|ua) means you can manage multiple kits without an account.
illust.brand_save—{name, palette[], fonts[], assets[], kit_id?}(passkit_idto overwrite)illust.brand_list— list your kitsillust.brand_delete—{kit_id}to delete- Editor "File" menu → "Brand kit" for GUI save / load / delete
3. Live share (read-only URL)
Share an in-progress session as a 30-day URL. Viewers visit /illustmaker/live/{token} and see updates via 3-second polling — perfect for internal review, client work-in-progress demos, and live teaching.
illust.share_create—{session, mode: view|comment, label?}→{token, url}illust.share_list— list issued linksillust.share_delete—{token}to revokeillust.share_view— public endpoint (no auth). Viewer page polls it.- Editor "File" menu → "Live share" (issue / copy URL / revoke)
3.5 Viewer comments (v4.1 add-on, mode='comment' only)
Issue a share link with mode='comment' and viewers can post spatial comments in the live viewer. Clicking the canvas anchors a pin; post a body and it appears for everyone. Multiple viewers' threads are listed; the owner can resolve or delete.
illust.share_comment_post— viewer submits a comment (public endpoint, no auth). Up to 2,000 characters. Omit x/y for a general comment.illust.share_comment_list— list comments (public).illust.share_comment_resolve— owner only, toggles resolved.illust.share_comment_delete— owner only, soft-deletes.- Rate limit: 20 comments / hour / viewer (ip+ua hash).
- HTTP-only polling: 5s for comments, 3s for canvas. No WebSocket.
This brings the Figma-style "many reviewers, one canvas" experience to Illustmaker — while editing remains the owner's privilege.
By the numbers
| Item | v3.0 | v4.0 | Delta |
|---|---|---|---|
| MCP HTTP API methods | 84 | 97 (v4.0=93 + v4.1=4) | +13 |
| Editor modals | 9 | 12 | +3 |
| New DB tables | — | illust_maker_brand_kits / illust_maker_share_links / illust_maker_share_comments | +3 |
Use cases
- Brand designers — manage per-client palettes & typography as brand kits. Tell the AI "use this kit" and let it generate accordingly.
- Agencies — share in-progress work with clients via a live URL. Fast feedback, natural confidentiality through URL expiry.
- Education / workshops — students follow the instructor's canvas live. "Here's how to build a mesh gradient" demonstrated in real time.
- AI agent developers — agent generates a mesh-gradient background, applies brand-kit colors to text, and emits a share URL for human approval — all in one session.
Technical notes
- Mesh interpolation — PHP-side bilinear interpolation from 4 corners or N×M color grid → SVG micro-triangle polygons.
- brand_kits / share_links — keyed by anonymous owner_fp = sha256(ip|ua). No login; you can't touch other people's kits.
- Live share — HTTP polling instead of WebSocket. Easy on servers, friendly with firewalls and corporate proxies.
Key URLs
| Service home | https://asi.co.jp/illustmaker/en/ |
| Editor | https://asi.co.jp/illustmaker/app/ |
| MCP docs (EN) | https://asi.co.jp/illustmaker/mcp/en/ |
| MCP docs (JP) | https://asi.co.jp/illustmaker/mcp/ |
| npm package | @illustmaker/mcp |
| llms.txt | https://asi.co.jp/illustmaker/llms.txt |
About ASI Inc.
| Company | ASI Inc. |
| CEO | Yusuke Saiki |
| Address | 3-18-17-310 Kamiuma, Setagaya-ku, Tokyo 154-0011, Japan |
| Founded | 2022 |
| Business | AI-first web services / MCP servers / contract development (AI integration, web development, internal systems) |
| URL | https://asi.co.jp/ |
Press contact
ASI Inc. — PR
Email: info@asi.co.jp
Service URL: https://asi.co.jp/illustmaker/en/