Support Markdown Content for pages

[mwarkentin]

I'm interested in using markdown content in a terraform notion provider.

It looks like this requires using notion API version 2026-03-11

Example create curl call:

curl -X POST https://api.notion.com/v1/pages \
  -H 'Authorization: Bearer '"$NOTION_API_KEY"'' \
  -H "Content-Type: application/json" \
  -H "Notion-Version: 2026-03-11" \
  --data '{
    "parent": { "page_id": "YOUR_PAGE_ID" },
    "markdown": "# Meeting Notes\n\nDiscussed roadmap priorities.\n\n## Action items\n\n- [ ] Draft proposal\n- [ ] Schedule follow-up"
  }'

Example fetch curl call:

curl 'https://api.notion.com/v1/pages/YOUR_PAGE_ID/markdown' \
  -H 'Authorization: Bearer '"$NOTION_API_KEY"'' \
  -H "Notion-Version: 2026-03-11"

Response:

{
  "object": "page_markdown",
  "id": "page-uuid",
  "markdown": "# Meeting Notes\n\nDiscussed roadmap priorities.\n\n## Action items\n\n- [ ] Draft proposal\n- [ ] Schedule follow-up",
  "truncated": false,
  "unknown_block_ids": []
}