The web server API uses tiddlers in a special format originally designed for TiddlyWeb:

• Field values are represented as strings. Lists (like the tags and list fields) use double square brackets to quote values that contain spaces
• Tiddlers are represented as an object containing any of a fixed set of standard fields, with custom fields being relegated to a special property called fields
• The standard fields are: bag, created, creator, modified, modifier, permissions, recipe, revision, tags, text, title, type, uri

For example, consider the following tiddler:

{
	"title": "HelloThere",
	"tags": "FirstTag [[Second Tag]]",
	"my-custom-field": "Field value"
}

In transit over the API, the tiddler would be converted to the following format:

{
	"title": "HelloThere",
	"tags": "FirstTag [[Second Tag]]",
	"fields": {
		"my-custom-field": "Field value"		
	}
}