Bulk Download of MSA Files from AlphaFold DB

Description:

I'm trying to download Multiple Sequence Alignment (MSA) files for several million proteins from the AlphaFold database (https://alphafold.ebi.ac.uk/).

For individual proteins, I can successfully download MSA files through the "Download files" section on the protein entry pages (e.g., https://alphafold.ebi.ac.uk/files/msa/AF-G1JSI4-F1-msa_v6.a3m). However, I need to download MSA files at scale using a list of protein IDs. I've explored several options but encountered limitations:

• Direct API-style downloads​ using the individual protein links - This appears to work for single files, but I'm concerned about potential rate limiting when scaling to millions of requests. I couldn't find documentation about API rate limits or bulk download policies.
• Google Cloud bucket​ - The available data appears to be limited to version v4 and doesn't include MSA files.
• EBI FTP server​ (https://ftp.ebi.ac.uk/pub/databases/alphafold/) - While the changelog mentions MSA updates, I couldn't locate the actual MSA files in the directory structure.

Questions:

• What is the recommended approach for bulk downloading MSA files given a list of protein IDs?
• Are there any rate limits or best practices I should follow when making large numbers of requests to the individual download endpoints?

Thank you for your assistance and for maintaining this valuable resource!