We will be updating our IPFS endpoints to go-ipfs v0.4.21 on Thursday, June 6, 2019 at 16:00 UTC. No downtime is expected, but this release contains the following change:
CIDv1 multihashes now are by default encoded in base32, this will impact developers using the /api/v0/dag/put endpoint and (depending on arguments passed to API requests) may impact developers using the /api/v0/add and /api/v0/block/put endpoints. Developers using these API endpoints may need to update their code to expect the new base32 CIDv1 hashes.
More info at https://github.com/ipfs/go-ipfs/releases/tag/v0.4.21