Felt supports oEmbed, a standardized way of allowing rich embeds on third party sites like Notion or WordPress.

To achieve this, every map contains a line like this in the header following the standard oEmbed protocol:

<link rel="alternate" type="application/json+oembed" title="Global Human Settlement" href="<https://felt.com/oembed?format=json&amp;url=https%3A%2F%2Ffelt.com%2Fembed%2Fmap%2FGlobal-Human-Settlement-5FzbIDg4RA9B5XnhuPnGgzC>">

That line contains a link with the form https://felt.com/oembed?format=json&url={FELT_MAP_URL} which, when followed, returns a standard oEmbed response that can be used to embed the map in a page in the proper way:

{
  "type": "rich",
  "version": "1.0",
  "title": "Global Human Settlement",
  "html": "<iframe width="800" height="600" frameborder="0" title="Global Human Settlement" src="https: //felt.com/embed/map/Global-Human-Settlement-5FzbIDg4RA9B5XnhuPnGgzC"></iframe>",
  "referer": "",
  "thumbnail_url": "<https://d3a9fdbxbk3c9v.cloudfront.net/33fd3fdf-0e6d-49b3-83a4-a504d082668c.jpg>",
  "cache_age": 3600,
  "provider_name": "Felt",
  "provider_resource": "<https://felt.com/embed/map/Global-Human-Settlement-5FzbIDg4RA9B5XnhuPnGgzC>",
  "provider_url": "<https://felt.com>",
  "thumbnail_height": 165,
  "thumbnail_width": 220
}