Public Notion Page not detected as public because missing ID in URL

[mfts]

Notion added an option to add a URL like subdomain.notion.site/page-name. But when parsing this url, it doesn't work because the parser is looking for a pageId, which doesn't exist in the URL.

Anyone else have run into this issue? Any workarounds?

Kind regards,
Marc

[maximas31]

I found a workaround, you can parse the URL and if ID was not found, send url to Notion API, this will return pageId

async function getNotionPageIdFromSlug(url) {
  // Parse the URL to extract domain and slug
  const urlObj = new URL(url);
  const hostname = urlObj.hostname;

  // Extract domain from hostname (e.g., "domain" from "domain.notion.site")
  const domainMatch = hostname.match(/^([^.]+)\.notion\.site$/);
  if (!domainMatch) {
    throw new Error('Invalid Notion site URL format: ${url}');
  }

  const spaceDomain = domainMatch[1];

  // Extract slug from pathname (remove leading slash)
  // If slug is missing, we will try to get page just by using spaceDomain
  let slug = urlObj.pathname.substring(1) || '';

  // Make request to Notion's internal API
  const apiUrl = 'https://${spaceDomain}.notion.site/api/v3/getPublicPageDataForDomain';
  const payload = {
    type: 'block-space',
    name: 'page',
    slug: slug,
    spaceDomain: spaceDomain,
    requestedOnPublicDomain: true,
  };

  const response = await fetch(apiUrl, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'User-Agent': 'Mozilla/5.0 (compatible; MyApp/1.0)',
    },
    body: JSON.stringify(payload),
  });

  if (!response.ok) {
    throw new Error('Notion API request failed: ${response.status} ${response.statusText}');
  }

  const data = await response.json();

  if (data.pageId) {
    return data.pageId;
  } else {
    throw new Error('No pageId found in Notion API response');
  }
}

// Usage example:
const pageId = await getNotionPageIdFromSlug('https://myworkspace.notion.site/custom-slug-page');