MythX for Truffle is a Truffle plugin that adds automated smart contract security analysis to the Truffle framework. With this plugin, you can run security analysis directly from your Truffle development environment.

The MythX plugin requires Truffle 5.0 or higher. Note that your Truffle project must compile successfully for the security analysis to work.


You can install the plugin on a per-project basis or globally.


Windows users have reported potential issues with installation. You may have to install the following dependencies:

Individual project

Install the plugin on an individual Truffle project by running the following inside the root of your Truffle project:

npm install truffle-security

The plugin will install for that Truffle project only. In addition, the plugin will edit the project’s configuration file (truffle-config.js) to add the necessary plugin configuration. You do not need to edit this file.


If you have existing plugins activated for the project, they will not be affected.

Global installation

Install the plugin globally so that it is accessible to all projects:

npm install truffle-security

If you install MythX for Truffle in this manner, you will in addition need to edit each project’s configuration file (truffle-config.js) to add the necessary plugin:

module.exports = {

  // ...

    plugins: [ "truffle-security" ],

  // ...



To run MythX for Truffle, run the following command in the root of your configured Truffle project:

truffle run verify


The project must compile successfully in order for the plugin to run. If the project hasn’t been compiled yet, MythX for Truffle will try to compile it first.

By default, all contracts in the project will be analyzed. To analyze only some of the contracts, append them to the command:

truffle run verify MyContract MyContract2

The above command will analyze only the MyContract and MyContract2 contracts.

Command options

To see the various command options available to you, run the following:

truffle run verify --help


Provides additional debug output. Use --debug=2 for more verbose output.

--uuid <UUID>

(Experimental) Prints in YAML results from a prior run having <UUID>.


Performs quick or in-depth (full) analysis.


Outputs the report in the given es-lint style.

--timeout <S>

Limits MythX analyses time to <S> seconds. The default is 120 seconds.

--limit <N>

Limit the pending analysis requests to no more than <N> at a time. As results come back, remaining contracts are submitted. The default is 10 contracts, the maximum value, but you can set this lower.


Show package and MythX version information.


Will not display progress bars during analysis.

Accounts and access

You do not need to sign up for a MythX account in order to use the MythX plugin for Truffle.

By default the plugin runs in Trial mode. Trial mode returns a limited report, with not all vulnerabilities listed. To get access to an unrestricted report, sign up for an account at


Both free and paid plans are available. See Obtaining API Credentials for more details.

Once you have signed up for an account, you will need to add your account and password as environment variables on your system.

Environment variable Value
MYTHX_ETH_ADDRESS Your MythX account (Ethereum address)
MYTHX_PASSWORD Your MythX password

You can temporarily add these environment variables to your terminal with the following commands (which will need to be customized with your account information):

  • Linux / macOS:

    export MYTHX_ETH_ADDRESS=0x1234567891235678900000000000000000000000
    export MYTHX_PASSWORD='Put your password in here!'
  • Windows:

    set MYTHX_ETH_ADDRESS=0x1234567891235678900000000000000000000000
    set MYTHX_PASSWORD='Put your password in here!'

Once you have done this, the MythX plugin should recognize your credentials and elevate your privileges.