Blossom is a spec for a set of HTTP endpoints that allow users to store blobs of data on publicly accessible servers
Blobs are packs of binary data addressed by their sha256 hash
Blossom Servers expose four endpoints for managing blobs
GET /<sha256>
.ext
HEAD /<sha256>
PUT /upload
Authentication
GET /list/<pubkey>
DELETE /<sha256>
BUDs stand for Blossom Upgrade Documents.
See the BUDs folder and specifically BUD-01 for a detailed explanation of the endpoints
Public domain.