List access points

The Access Point directory: every Provider in its serving role, with its member seats and roster size (current participant count), busiest first. A Provider is resolved from each seat with the precedence curated mapping (verified) → exact signing-cert O= string (unverified) → bare SeatID. Not paginated (the envelope's next_cursor is always null). Pass ?country=CC to compare providers within one market instead of network-wide. Every item carries the windowed net growth; a MARKET-tier key additionally gets the four churn components behind each net (joiners, movers_in, movers_out, leavers × 7d/30d/90d), which a lower-tier key simply does not receive.

kind selects the row kinds. The default is provider, and the list is then Provider rows only. A Vendor is a curated software or service brand that connects its customers through the Seats of one or more Providers; kind=vendor returns the Vendor rows and kind=all returns both, each item marked by kind. A Vendor's participants are always also in the count of the Provider that serves them: never add Provider rows and Vendor rows into one total, share or rank.