Let's Encrypt

Let's Encrypt Account API

ACME account creation and management

Documentation GitHub OpenAPI

Operations 3

POST /acme/new-acct Create or look up an account #

POST /acme/acct/{accountId} Update or deactivate account #

POST /acme/key-change Rotate account key #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Let's Encrypt ACME Account API
  description: The ACME (Automatic Certificate Management Environment) protocol API used by Let's Encrypt to automate the issuance, renewal, and revocation of TLS certificates. Implements RFC 8555.
  version: '1.0'
  contact:
    name: Let's Encrypt
    url: https://letsencrypt.org/docs/
  license:
    name: Mozilla Public License 2.0
    url: https://www.mozilla.org/en-US/MPL/2.0/
servers:
- url: https://acme-v02.api.letsencrypt.org
  description: Production ACME endpoint
- url: https://acme-staging-v02.api.letsencrypt.org
  description: Staging ACME endpoint
tags:
- name: Account
  description: ACME account creation and management
paths:
  /acme/new-acct:
    post:
      tags:
      - Account
      summary: Create or look up an account
      description: Creates a new ACME account or returns the URL of an existing account for the given key.
      operationId: newAccount
      requestBody:
        required: true
        content:
          application/jose+json:
            schema:
              $ref: '#/components/schemas/JWS'
      responses:
        '201':
          description: Account created
        '200':
          description: Existing account returned
  /acme/acct/{accountId}:
    post:
      tags:
      - Account
      summary: Update or deactivate account
      operationId: updateAccount
      parameters:
      - name: accountId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/jose+json:
            schema:
              $ref: '#/components/schemas/JWS'
      responses:
        '200':
          description: Account updated
  /acme/key-change:
    post:
      tags:
      - Account
      summary: Rotate account key
      operationId: keyChange
      requestBody:
        required: true
        content:
          application/jose+json:
            schema:
              $ref: '#/components/schemas/JWS'
      responses:
        '200':
          description: Account key rotated
components:
  schemas:
    JWS:
      type: object
      description: Flattened JSON Web Signature object per RFC 7515
      properties:
        protected:
          type: string
        payload:
          type: string
        signature:
          type: string