Bulk add DNS records, bulk redirects limits

[user22673]

I have two “new to Cloudflare” questions.

I have added around 900 domains and all are now active, pointed to the required Cloudflare nameservers.
My only aim: simple URL forwarding, each domain to a unique, static URL.

Two questions please:

1. Most of the domains have no A or CNAME records. How can I add these in bulk (not point and click through them individually)?

I have tried the CURL below but am getting error 10000 authentication error with (generic version below)
curl -X PUT “https://api.cloudflare.com/client/v4/zones/023e105f4ecef8ad9ca31a8372d0c353/dns_records/372e67954025e0ba6aaa6d586b9e0b59”
-H “X-Auth-Email: [email protected]”
-H “X-Auth-Key: c2547eb745079dac9320b638f5e225cf483cc5cfdda41”
-H “Content-Type: application/json”
–data ‘{“type”:“A”,“name”:“example.com”,“content”:“127.0.0.1”,“ttl”:3600,“proxied”:false}’

2. Using Bulk Redirects and a forwarding list generated from a CSV upload, only the first 20 items are added - which Cloudflare plan or alternative approach do I need in order to upload all 900 redirects?

Thanks.