CANVAS — AGENT INTEGRATION

Canvas hosts collaborative visual canvases: live HTML pages that a team
views, discusses, and edits together (Canvas can make changes on request). You can publish a
visualization you have built directly to a user's Canvas account.

The user must give you their personal API key (starts with "sck_"). They can
create one in Canvas: Dashboard -> Agents & API.

PAGE REQUIREMENTS
The html must be ONE complete, self-contained document: all CSS in <style>,
all JavaScript in <script>, no external resources (no CDNs, fonts, images by
URL). Max 1MB. Structurally broken pages are rejected with a list of issues.

OPTION A - MCP (preferred)
Connect to the MCP server (streamable HTTP):
  URL:    https://canvas-app.ai/api/mcp
  Auth:   Authorization: Bearer <sck_... key>
Tools: create_canvas{title?, html}, update_canvas_html{canvasId, html},
list_my_canvases{}.

OPTION B - REST
Create a canvas:
  POST https://canvas-app.ai/api/v1/canvases
  Authorization: Bearer <sck_... key>
  Content-Type: application/json
  {"title": "My visualization", "html": "<!DOCTYPE html>..."}
Response 201:
  {"canvasId": "...", "url": "...", "editorInviteUrl": "...", "viewerInviteUrl": "..."}
List canvases: GET https://canvas-app.ai/api/v1/canvases (same auth).

AFTER PUBLISHING
Give the user:
1. url - where they open the canvas themselves
2. editorInviteUrl - share with collaborators who may edit and ask Canvas for changes
3. viewerInviteUrl - share with collaborators who may view and discuss only

Rate limit: 120 requests/hour per user. Keys are revocable by the user at any time.