Direct age Encryption <Badge type="warning" text="experimental" />

Encrypt individual environment variable values directly in mise.toml using age encryption. The age tool is not required—mise has support built-in.

This is a simple method of storing encrypted environment variables directly in mise.toml. You can use it simply by running mise set --age-encrypt <key>=<value>. By default, mise will use your ssh key (~/.ssh/id_ed25519 or ~/.ssh/id_rsa) if it exists.

• Inline storage: values live alongside other env vars in mise.toml
• Multiple recipients: x25519 age keys and SSH recipients
• Automatic decryption: at runtime when identities are available

Quick start

1. [optional] Generate an age key (if you want to create a new age key and don't want to use your ssh key):

age-keygen -o ~/.config/mise/age.txt
# Note the public key output for encryption

2. Encrypt a value:

mise set --age-encrypt --prompt DB_PASSWORD
# Enter value for DB_PASSWORD: [hidden input]

::: warning It's recommended to use --prompt to avoid accidentally exposing the value to your shell history. You don't have to though, you can use mise set --age-encrypt DB_PASSWORD="password123". :::

3. Values are stored encrypted in mise.toml as an age directive:

[env]
DB_PASSWORD = { age = { value = "<base64>" } }

4. Decryption happens automatically:

mise env  # Variables are decrypted automatically

CLI flags

• --age-encrypt — enable age encryption for the value
• --age-recipient <KEY> — x25519 recipient (can be set multiple times)
• --age-ssh-recipient <PATH|KEY> — SSH public key or path to .pub/private key (can be set multiple times)
• --age-key-file <PATH> — use recipients derived from an age identity file
• --prompt — prompt for the value to avoid accidentally exposing it to your shell history

If no recipients are provided explicitly, mise will try defaults (see below).

Storage format

Encrypted values are stored as base64 along with a format field:

• format = "raw" — uncompressed ciphertext (typically for small values)
• format = "zstd" — zstd-compressed ciphertext (used when ciphertext > 1KB)

Decryption identities

mise looks for identities in this order:

1. MISE_AGE_KEY environment variable
   • Can contain one or more raw AGE-SECRET-KEY-... lines, or an age identity file payload
2. settings.age.identity_files (list of paths)
3. settings.age.key_file (single path)
4. Default ~/.config/mise/age.txt if it exists
5. SSH identities from settings.age.ssh_identity_files and common defaults (~/.ssh/id_ed25519, ~/.ssh/id_rsa)

Decrypted values are always marked as redacted.

If no identities are found or decryption fails, mise returns the encrypted value as-is (non-strict behavior).

Defaults for recipients (encryption)

When --age-encrypt is used without explicit recipients, mise attempts to derive recipients from:

• The public keys corresponding to identities in the default key file ~/.config/mise/age.txt
• Public keys inferred from SSH private keys if a corresponding .pub file exists

If none are found, the command fails with an error asking you to provide recipients or configure settings.age.key_file.

Settings

Notes

• Feature is experimental; flags and behavior may change.
• mise set KEY will print the decrypted value