Provide information about the capabilities and limitations of the current API.
osm_capabilities()A list with the API capabilities and policies.
API:
version minimum and maximum are the API call versions that the server will accept.
area maximum is the maximum area in square degrees that can be queried by API calls.
tracepoints per_page is the maximum number of points in a single GPS trace. (Possibly incorrect)
waynodes maximum is the maximum number of nodes that a way may contain.
relationmember maximum is the maximum number of members that a relation may contain.
changesets maximum_elements is the maximum number of combined nodes, ways and relations that can be contained
in a changeset.
changesets default_query_limit and maximum_query_limit are the default and maximum values of the limit
parameter of osm_query_changesets().
notes default_query_limit and maximum_query_limit are the default and maximum values of the limit parameter
of notes bounding box queries (osm_read_bbox_notes()) and search (osm_search_notes()).
The status element returns either online, readonly or offline for each of the database, API and GPX
API. The database field is informational, and the API/GPX-API fields indicate whether a client should expect
read and write requests to work (online), only read requests to work (readonly) or no requests to work
(offline).
Policy:
Imagery blacklist lists all aerial and map sources, which are not permitted for OSM usage due to copyright. Editors must not show these resources as background layer.
Other API functions:
authenticate_osmapi(),
osm_api_versions(),
osm_permissions(),
set_osmapi_connection()