In general, our API doesn't allow for batch operations. There's one exception: You can archive links or add or remove tags from links, up to 100 links at once.
All other actions, like shortening links, creating QR Codes, or getting metrics for a link, need to be done one at a time.
For example, if you want to shorten 500 links, you need to send a POST request to /v4/shorten or /v4/bitlinks endpoint 500 times — once for each link. If you have access to a developer, they can create a script that repeats the API call until all of your links have been shortened.
These are still subject to our API rate limits, as well as the monthly limits on your subscription plan. You may need to include "sleep" calls to stay under the limits.