Collections API not working

[psologub]

Hi there, it seems that the Collections API is not returning JSON objects anymore. Is this a permanent change?

[jamieu]

Hi Polo, we've increased the bot protection on our CDN/WAF due to extremely high traffic from various bots, which I expect is why you are being blocked.

Are you sending a HTTP User-Agent header with your requests, if not adding one may help.
Also sending many requests in quick succession will cause rate limiting to kick in, so spacing them out may help.

Jamie