Is there a limit of API requests?

[jomaxro (Joshua Rosenfeld)]

Yes there is. Check out

Global rate limits and throttling in Discourse

Discourse ships with 3 different global rate limits that can be configured by site admins. Global per-ip rate limits These limits apply to every unique IP address that hits the Discourse application. (files that are served directly from the filesystem or the CDN are excluded) By default this rate limit is enabled, you may disable it or set it to a reporting mode. DISCOURSE_MAX_REQS_PER_IP_MODE : default block, this rate limit applies out of the box. (other options are warn, warn+block, and n…