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The endpoint is supported by six nodes being fully load-balanced across the globe for maximum availability.
They expand from Canada to the UK, France and Germany, with one or two nodes running in each site.

The nodes are run in dedicated and privately controlled servers. Although they are hosted inside a large datacenter provider’s network, only the persons running the servers have control over the software and configurations, including the operating system instalation - the datacenter provider only handles network access, power and hardware support.

There are dedicated firewalls in each site and the nodes share a high-speed private network between them across all the sites, that enables every archive node to be used for any api call coming from anywhere and regardless of where it entered the infrastructure.
Each node is capable of using any of the sites as a gateway for the Internet and both failover and recovery of gateway routes is automatic.

The load-balancing, anti-ddos and rate limiting features are provided through Cloudflare, a market leader and reference for this type of services. The load-balancing of the clients is optimized by Cloudflare’s own fully charged edge network and services, such that no request reaches the servers without first being handled and properly vetted and treated by it.
Furthermore, there’s a second load-balancing layer in the private network that enables requests to be answered by any node in every site and hence the load is evenly distributed across all sites regardless of the point of origin, all in an optimized way.

All of this is configured and supported by Stake4.me, including all expenses and operational costs.
These archive nodes are run right along with the validator nodes in every way.