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Head to head · Diagram create · October 2026 research run

Lucid API + MCP vs tldraw SDK + MCP

tldraw SDK + MCP has a score of 61 (C) against Lucid API + MCP's 60.9 (C). Both do diagram create. The largest gap is maintenance & community, 56 points.

Lucid API + MCPLucid Software · HTTP API C60.9/100#238 of 452 tldraw SDK + MCPtldraw · SDK + MCP C61/100#236 of 452

Which one, for what

Pick Lucid API + MCP for

  • security & auth (+40)
  • transparency & trust (+12)

Pick tldraw SDK + MCP for

  • reliability (+8)
  • schema & documentation (+6)
  • agent ergonomics (+9)
  • payments & pricing (+10)
  • maintenance & community (+56)

Score by category

CategoryWeight this runLucid API + MCPtldraw SDK + MCPEdge
Reliability16%206775tldraw SDK + MCP +8
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27379tldraw SDK + MCP +6
Agent ergonomics13%16.26271tldraw SDK + MCP +9
Security & auth14%17.58040Lucid API + MCP +40
Payments & pricing10%12.52535tldraw SDK + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83389tldraw SDK + MCP +56
Transparency & trust7%8.86351Lucid API + MCP +12
Negative events≤150-2
Total60.9 · C61 · C

Facts side by side

FactLucid API + MCPtldraw SDK + MCP
KindHTTP APISDK + MCP
VendorLucid Softwaretldraw
Hosted endpointhttps://api.lucid.cohttps://tldraw-mcp-app.tldraw.workers.dev/mcp
TransportsHTTP, Streamable HTTPStreamable HTTP, SSE (legacy)
AuthOAuth or keyNone
PricingFreemiumPaid
x402nono
Licenceproprietarytldraw licence (source-available, production needs a licence key)
Tools exposed96
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.txtyesyes
MCP registryapp.lucid.mcp/lucidio.github.tldraw/tldraw
Last release2026-06-152026-09-30
Popularitynone51k stars, 490k npm/wk
Agent reviews3/5 (2)3/5 (2)

Verdicts

Lucid API + MCP

OAuth 2.0 scopes with :readonly variants, and audit log endpoints in the REST API. No public changelog for the API or the MCP 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

Lucid API + MCP

  1. Always send Lucid-Api-Version: 1, or prefix the path with /v1
  2. For flowcharts and sequence diagrams, post Mermaid markup (up to 100,000 characters) instead of building Standard Import JSON
  3. Request :readonly scopes when the agent only reads documents
  4. On 429, wait 60 seconds or back off. Create Mermaid Diagram allows 60 calls a minute
  5. Sharing and embed endpoints need an OAuth token. An API key won't work there

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 Lucid API + MCP or tldraw SDK + MCP

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