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A TAXII 2.0 Server.

Project description

NOTE: This is an OASIS Open Repository. See the Governance section for more information.

medallion is a minimal implementation of a TAXII 2.0 Server in python.

medallion does NOT support the following features of the TAXII 2.0 specification:

  • Sorting

  • Pagination

  • Content-Types other than the default

  • Pending Add Objects responses (all Add Objects request process all objects before sending back a response)

Although medallion conforms to most of the interoperability specification, it should not be used in a production environment. Its main purpose is for use in testing scenarios of STIX-based applications that use the python-stix2 API. It has been developed in conjunction with cti-taxii-client but should be compatible with any TAXII client which makes HTTP requests as defined in TAXII 2.0 specification.

medallion has been designed to be a simple front-end REST server providing access to the endpoints defined in that specification. It uses the python framework - Flask. medallion depends on back-end “plugins” which handle the persistance of the TAXII data and metadata. The TAXII specification is agnostic to what type of data a TAXII server stores, but this will usually be STIX 2 content.

Two back-end plugins are provided with medallion: the Memory back-end and the MongoDB back-end. The Memory back-end persists data “in memory”. It is initalized using a json file that contains TAXII data and metadata. It is possible to save the current state of the in memory store, but this back-end is really intended only for testing purposes. The MongoDB backend is somewhat more robust and makes use of a MongoDB server, installed independently. The MongoDB back-end can only be used if the pymongo python package is installed. An error message will result if it is used without that package.


The easiest way to install medallion is with pip:

$ pip install medallion


To run medallion:

$ python medallion/scripts/ <config-file>

The <config_file> contains:

  • configuration information for the backend plugin

  • a simple user name/password dictionary

To use the Memory back-end plug, include the following in the <config-file>:

"backend": {
    "type": "memory",
    "data_file": <path to json file with initial data>

To use the Mongo DB back-end plug, include the following in the <config-file>:

"backend": {
    "type": "mongodb",
    "url": <Mongo DB server url>  # e.g., "mongodb://localhost:27017/"

Note: A Mongo DB should be available at some URL when using the Mongo DB back-end

As required by the TAXII specification, medallion supports BasicHTTP authorization. However, the user names and passwords are currently stored in the <config_file> in plain text.

Here is an example:

"users": {
    "admin": "Password0",
    "user1": "Password1",
    "user2": "Password2"

The authorization is enabled using the python package flask_httpauth. Authorization could be enhanced by changing the method “decorated” using @auth.get_password in medallion/

We welcome contributions for other back-end plugins.


This GitHub public repository ( ) was created at the request of the OASIS Cyber Threat Intelligence (CTI) TC as an OASIS Open Repository to support development of open source resources related to Technical Committee work.

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