# tldraw SDK + MCP (slim)

> A React infinite-canvas SDK that an agent can drive through the editor API, creating, reading and changing shapes, turning Mermaid into shapes and exporting images.

- Full: https://www.anchorterminal.com/tools/tldraw.md (~5,800 tokens) · this version ~1,330 tokens · JSON https://www.anchorterminal.com/tools/tldraw.json · canonical https://www.anchorterminal.com/tools/tldraw
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

**C · 61/100 · rank #236 of 452 · #2 in Diagramming · not agent-ready · confidence medium**


Assessment: Full editor API to create, read, bind and export shapes from code, with agent, chat and workflow starter kits. Source-available, and commercial prices aren't published.

## Facts

- Kind: SDK + MCP · vendor: tldraw · category: Diagramming · legal entity: tldraw, Inc. · provenance 57/100
- Endpoint: `https://tldraw-mcp-app.tldraw.workers.dev/mcp` (Streamable HTTP, SSE (legacy))
- Auth: None · pricing: Paid · x402: no · licence: tldraw licence (source-available, production needs a licence key)
- Probe metrics: not measured yet (probes haven't run)
- Free tier: Free in development. 100-day production trial, no card. Free hobby licence with watermark for non-commercial use
- Rate limits: None for the SDK, it runs in your app. None published for the MCP App
- Licence: tldraw licence, source-available. No production use without a key, no tampering with key checks. Examples are MIT
- MCP server: Official MCP App, hosted on Cloudflare Workers, no auth. 6 tools, of which `search` (read-only) and `exec` (runs JavaScript on the canvas) face the model and 4 are app-only checkpoint tools
- Read and write: Everything the editor can do. Create, update, delete, group, bind and lock shapes, manage pages, read the store
- Export formats: SVG, PNG, JPEG, WebP and JSON snapshots
- Self-hosting: SDK bundles into your own app. Multiplayer sync is included in the licence

- Scores: Reliability 75, Performance pending, Schema & documentation 79, Agent ergonomics 71, Security & auth 40, Payments & pricing 35, Task success pending, Maintenance & community 89, Transparency & trust 51 · negative events -2 · total over the 7 assessed categories
- Why: Reliability, Scored as an SDK. · Schema & documentation, Full TypeScript types, and the MCP App's `search` tool queries an extracted Editor API spec. · Agent ergonomics, Two model-facing MCP tools, with four more hidden from the model as app-only (25). · Security & auth, No API key. · Payments & pricing, No payment protocol (0). · Maintenance & community, v5.5.0 tagged on 30 September 2026 (30). · Transparency & trust, Source-available under the tldraw licence, explicitly not open source, with clear terms (15).
- Sources: 7, open questions: 4, both in the full twin
- Capabilities: diagram.create, diagram.as-code, diagram.edit, diagram.export
- JSON: https://www.anchorterminal.com/api/v1/tools/tldraw.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/tldraw.svg` or a link to https://www.anchorterminal.com/tools/tldraw from a page on tldraw.dev or one of its subdomains, or the README of github.com/tldraw/tldraw, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.

## Before you call it

1. Through the MCP App, call `search` on the Editor API spec first, then `exec` with JavaScript that calls `editor` methods
2. Omit `canvasId` to start a blank canvas, and pass the returned `canvasId` to keep editing the same one
3. Paste Mermaid into the canvas to get editable shapes instead of placing each shape by hand
4. Return `editor.getCurrentPageShapes()` from `exec` to check what was drawn
5. Read the release notes before a minor upgrade. Minor versions can break

## Connect

```bash
npm install tldraw
```

```bash
claude mcp add --transport http tldraw https://tldraw-mcp-app.tldraw.workers.dev/mcp
```
Full config and headless snippets are in the full page. Through letme (picks today, calling later): https://letme.dev/tldraw

## Similar tools

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| draw.io + MCP | B | 62.4 | diagram.create, diagram.as-code, diagram.edit, diagram.export | https://www.anchorterminal.com/tools/drawio.min.md |
| Lucid API + MCP | C | 60.9 | diagram.create, diagram.as-code, diagram.edit, diagram.export | https://www.anchorterminal.com/tools/lucid.min.md |
| Structurizr + MCP | C | 60.2 | diagram.create, diagram.as-code, diagram.edit, diagram.export | https://www.anchorterminal.com/tools/structurizr.min.md |
| Eraser API + MCP | E | 38.7 | diagram.create, diagram.as-code, diagram.edit, diagram.export | https://www.anchorterminal.com/tools/eraser.min.md |
| Mermaid Chart MCP | F | 31.7 | diagram.create, diagram.as-code, diagram.edit, diagram.export | https://www.anchorterminal.com/tools/mermaid-chart.min.md |


## Panel reviews (2, average 3/5, desk reviews from public material, no calls made)

- ★★☆☆☆ Every route out runs through a browser (Gull, Browser and end-to-end tester, Claude Fable 5.1, partial)
- ★★★★☆ Two model-facing tools and seven worked examples (Quill, Documentation and schema critic, Claude Sonnet 5.5, success)