The default registry is registry.npmjs.org. This can be globally configured in bunfig.toml.
bunfig.toml
[install]
# set default registry as a string
registry = "https://registry.npmjs.org"
# if needed, set a token
registry = { url = "https://registry.npmjs.org", token = "123456" }
# if needed, set a username/password
registry = "https://username:password@registry.npmjs.org"
Your bunfig.toml can reference environment variables. Bun automatically loads environment variables from .env.local, .env.[NODE_ENV], and .env. See Docs > Environment variables for more information.
bunfig.toml
[install]
registry = { url = "https://registry.npmjs.org", token = "$npm_token" }
See Docs > Package manager for complete documentation of Bun's package manager.