ACME specification locationn


Just wondering where the current ACME specifications are to read as I saw multiple (ie, the IETF site, github, etc)


The version on GitHub is the one with the most recent changes. The latest draft would be acme-02, basically a snapshot from March.

Boulder currently implements the acme-01 draft, which can be found at If you’re looking for a specification explaining how Let’s Encrypt works today, that’s probably what you’re looking for.

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Thanks for the clarification. That’s what I was confused about (ie, the current version in production)

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