diff --git a/openapi/guichet-api.yml b/openapi/guichet-api.yml
index a647cce..f1f3873 100644
--- a/openapi/guichet-api.yml
+++ b/openapi/guichet-api.yml
@@ -3,7 +3,9 @@ info:
   version: v0.1.0
   title: Guichet API
   description: |
-    *TODO DESCRIPTION*
+    Programmatic API for managing a user account in Deuxfleurs' Guichet.
+
+    *Disclaimer: this API is currently unstable and does not yet cover all the features availble from Guichet's web interface.*
 
 paths: 
   /website:
@@ -13,47 +15,94 @@ paths:
       operationId: "ListWebsites"
       summary: "List all websites"
       description: |
-        *TODO*
+        List all the user's websites
       responses:
         '500':
           description: |
             The server can not answer your request because it is in a bad state
+        '200':
+          description: |
+            Returns information about all the user's websites, and user information related to websites.
+            The website quota (`quota_website_count`) indicates a quota in number of websites that the user is allowed to create.
+            TODO: document burst_bucket_quota_size
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  username:
+                    type: string
+                    example: "user"
+                  quota_website_count:
+                    $ref: '#/components/schemas/Quota'
+                  burst_bucket_quota_size:
+                    type: string # TODO: improve?
+                    example: "200 Mio"
+                  vhosts:
+                    type: array
+                    items:
+                      $ref: '#/components/schemas/Vhost'
 
   /website/{vhost}:
+    parameters:
+    - name: vhost
+      in: path
+      description: "Website identifier"
+      required: true
+      schema:
+        type: string
+      style: simple
     get:
       tags: 
         - Website
       operationId: "GetWebsite"
-      summary: "Get Website"
+      summary: "Details on a website"
       description: |
-        *TODO*
+        Gets the configuration and status for the website `vhost`.
+        This includes information about domains, bucket access keys, and quotas.
 
+        `quota_size` is given in bytes.
+        `quota_files` indicates a number of files.
       responses:
         '500':
           description: |
             The server can not answer your request because it is in a bad state
-                          
+        '404':
+          description: |
+            Website not found
+        '200':
+          description: |
+            Returns information about the website.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WebsiteInfo'
+
     post:
       tags:
         - Website
       operationId: "CreateWebsite"
       summary: "Create a new website"
       description: |
-        Instructs this Garage node to connect to other Garage nodes at specified `<node_id>@<net_address>`. `node_id` is generated automatically on node start.
-      requestBody:
-        required: true
-        content:
-          application/json:
-            schema:
-              # todo
-                
+        Creates a new website with identifier `vhost`.
+
       responses:
         '500':
           description: |
             The server can not answer your request because it is in a bad state
         '400':
           description: |
-            Your request is malformed, check your JSON
+            Your request is malformed, `vhost` must be non-empty.
+        '403':
+          description: |
+            Request forbidden, you have reached your quota of maximum number of websites allowed.
+        '200':
+          description: |
+            Returns information about the website that has been created.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WebsiteInfo'
 
     patch:
       tags:
@@ -61,14 +110,29 @@ paths:
       operationId: "ConfigureWebsite"
       summary: "Configure website"
       description: |
-        Instructs this Garage node to connect to other Garage nodes at specified `<node_id>@<net_address>`. `node_id` is generated automatically on node start.
+        Modifies configuration of the website with identifier `vhost`.
+
       requestBody:
         required: true
         content:
           application/json:
             schema:
-              # todo
-                
+              type: object
+              properties:
+                quota_size:
+                  type: integer
+                  format: int64
+                  nullable: true
+                  example: null
+                vhost:
+                  type: string
+                  nullable: true
+                  example: "my-website"
+                rotate_key:
+                  type: boolean
+                  nullable: true
+                  example: true
+
       responses:
         '500':
           description: |
@@ -76,6 +140,16 @@ paths:
         '400':
           description: |
             Your request is malformed, check your JSON
+        '404':
+          description: |
+            Website not found
+        '200':
+          description: |
+            Returns updated information about the website
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WebsiteInfo'
 
     delete:
       tags: 
@@ -83,21 +157,78 @@ paths:
       operationId: "DeleteWebsite"
       summary: "Delete Website"
       description: |
-        *TODO*
+        Delete the website with identifier `vhost`.
 
       responses:
         '500':
           description: |
             The server can not answer your request because it is in a bad state
+        '400':
+          description: |
+            Bad request, empty website identifier or website has unfinished uploads
+        '404':
+          description: |
+            Website not found
+        '204':
+          description: |
+            Success
 
-        
 components:
   securitySchemes:
     basicAuth:
       type: http
       scheme: basic
   schemas:
-    # todo
+    WebsiteInfo:
+      type: object
+      properties:
+        vhost:
+          $ref: '#/components/schemas/Vhost'
+        access_key_id:
+          type: string
+          example: "GK31c2f218a2e44f485b94239e"
+        secret_access_key:
+          type: string
+          example: "b892c0665f0ada8a4755dae98baa3b133590e11dae3bcc1f9d769d67f16c3835"
+        quota_size:
+          $ref: '#/components/schemas/Quota'
+        quota_files:
+          $ref: '#/components/schemas/Quota'
+    Vhost:
+      type: object
+      properties:
+        name:
+          type: string
+          example: "my-website"
+        alt_name:
+          type: array
+          items:
+            type: string
+            example: "my-other-website-name"
+        expanded:
+          type: boolean
+          example: false
+        domain:
+          type: string
+          example: "my-website.web.deuxfleurs.fr"
+    Quota:
+      type: object
+      properties:
+        current:
+          type: integer
+          format: int64
+          example: 1000
+        max:
+          type: integer
+          format: int64
+          example: 5000
+        ratio:
+          type: number
+          format: double
+          example: 0.2
+        burstable:
+          type: boolean
+          example: true
 
 security:
   - basicAuth: []