Index: docs/api/functions.md
===================================================================
--- a/docs/api/functions.md
+++ b/docs/api/functions.md
@@ -5,10 +5,19 @@
 * `get_string(name, page=None)`: retrieves a string from a locale file.
   Unless a page is specified the locale file matching the name of the current
   page is used.
+* `has_string(name, page=None)`: returns true if the named string exists in
+  the speficied page, otherwise returns false. If no page is specified, the
+  locale file matching the name of the current page if used.
 * `get_page_content(page, locale=None)`: returns a dictionary of the content
   and params for the given page and locale. Locale defaults to the current one
   if not specified. Provided keys include `head`, `body`, `available_locales`
   and `translation_ratio`.
+* `get_pages_metadata(filters=None)`: returns the metadata for all pages, if
+  no filters are given. If a filter is given, returns the metadata for each
+  page that matches the filter. Filters should be dictionaries. E.g.
+  `get_pages_metadata({'tags': ['popular', 'bar']})`
+* `get_canonical_url(page)`: returns the canonical URL for the given page,
+  without the locale code. The base URL must be configured in `settings.ini`
+  as `siteurl`.
 
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