This module let’s you activate a httpserver interface to handle data from webforms with POST and Base64 encoded JSON.

Implementation Details

Example Request format:

POST /your_register_base_url HTTP/1.1
Content-Type: application/encoded
Content-Transfer-Encoding: base64


Where the encoded content is this (example) JSON Array:


Your form implementation needs to pass all parameters, the auth_token is needed to prevent misuses, if the request is successful the server will answer with status code 200 and with the body of the response containing the token which your web app can send via e-mail to the user to complete the registration.

Else, it will reply with the following http error codes:

The verification URL path to direct the users to will be: /your-base-path-of-choice/verify/ - on your Prosody’s http server.

The module for now stores a hash of the user’s mail address to help slow down duplicated registrations.

It’s strongly encouraged to have the web server communicate with the servlet via https.


Copy the module folder and all its contents (register_json) into your prosody modules’ directory.Add the module your vhost of choice modules_enabled.

Hint: pairing with mod_register_redirect is helpful, to allow server registrations only via your webform.

Required configuration:

    reg_servlet_auth_token = "your-secret-token"

Optional configuration directives:

    reg_servlet_base = "/base-path/" -- Base path of the plugin (default is register_account)
    reg_servlet_secure = true -- Have the plugin only process requests on https (default is true)
    reg_servlet_ttime = seconds -- Specifies the time (in seconds) between each request coming from the same remote address.
    reg_servlet_bl = { "", "" } -- The ip addresses in this list will be blacklisted and will not be able to submit registrations.
    reg_servlet_wl = { "", "" } -- The ip addresses in this list will be ignored by the throttling.
    reg_servlet_filtered_mails = { ".*banneddomain.tld", ".*deamailprovider.tld" } -- allows filtering of mail addresses via Lua patterns.




With the plugin installer in Prosody 0.12 you can use:

sudo prosodyctl install --server= mod_register_json

For earlier versions see the documentation for installing 3rd party modules