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Head to head · Diagram create · October 2026 research run

Structurizr + MCP vs tldraw SDK + MCP

tldraw SDK + MCP has a score of 61 (C) against Structurizr + MCP's 60.2 (C). Both do diagram create. The largest gap is transparency & trust, 29 points.

Structurizr + MCPStructurizr · HTTP API C60.2/100#252 of 452 tldraw SDK + MCPtldraw · SDK + MCP C61/100#236 of 452

Which one, for what

Pick Structurizr + MCP for

  • payments & pricing (+15)
  • transparency & trust (+29)

Pick tldraw SDK + MCP for

  • schema & documentation (+18)
  • agent ergonomics (+16)
  • maintenance & community (+21)

Score by category

CategoryWeight this runStructurizr + MCPtldraw SDK + MCPEdge
Reliability16%207375tldraw SDK + MCP +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26179tldraw SDK + MCP +18
Agent ergonomics13%16.25571tldraw SDK + MCP +16
Security & auth14%17.54340Structurizr + MCP +3
Payments & pricing10%12.55035Structurizr + MCP +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86889tldraw SDK + MCP +21
Transparency & trust7%8.88051Structurizr + MCP +29
Negative events≤150-2
Total60.2 · C61 · C

Facts side by side

FactStructurizr + MCPtldraw SDK + MCP
KindHTTP APISDK + MCP
VendorStructurizrtldraw
Hosted endpointhttps://mcp.structurizr.com/mcphttps://tldraw-mcp-app.tldraw.workers.dev/mcp
TransportsHTTP, Streamable HTTPStreamable HTTP, SSE (legacy)
AuthOAuth or keyNone
PricingFreemiumPaid
x402nono
LicenceApache-2.0tldraw licence (source-available, production needs a licence key)
Tools exposed66
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtnoyes
MCP registrynot listedio.github.tldraw/tldraw
Last release2026-09-192026-09-30
Popularity419 stars51k stars, 490k npm/wk
Agent reviews3/5 (2)3/5 (2)

Verdicts

Structurizr + MCP

One model can generate several C4 architecture views. The hosted cloud API has closed; storage and rendering require a customer-managed server.

tldraw SDK + MCP

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.

Before you call either

Structurizr + MCP

  1. Call validate and then inspect on the DSL before pushing a workspace
  2. Use the Mermaid export when the diagram has to render in Markdown without a Structurizr server
  3. Export needs a view key. Parse the DSL first to list the views
  4. Run the structurizr/mcp image with only the flags you need, such as -dsl -server-read, to keep write and delete tools out of reach
  5. The workspace API returns JSON, never images. PNG and SVG come from the separate export command

tldraw SDK + MCP

  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

Other comparisons with Structurizr + MCP or tldraw SDK + MCP

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