Remix integration with MythX

MythX is available as a plugin for Remix, a popular web-based IDE for smart contract development and deployment, created and hosted by the Ethereum Foundation.




These instructions will show the Remix interface that is current as of mid-2019. We recommend everyone use this interface.

Because Remix is a web-based interface, no local installation is required. However, MythX will need to be specifically activated from within the Remix Plugin Manager before use.

To activate MythX in Remix:

  1. Click the Plugins icon (which resembles a plug).


    Alternately, click the See all Plugins button under Featured Plugins.

  2. The full list of plugins for Remix will be displayed. Scroll down to the entry titled MythX Security Verification and click Activate.


    If done correctly, the plugin will be listed under Active Modules and the MythX icon will be shown in the sidebar.

  3. (Optional but recommended) Click the MythX logo and enter your MythX credentials. This consists of your Ethereum address (also known as User ID) and the password supplied to you when you created your account at When done, click Save.



    Without MythX credentials, you will be running in Trial Mode, which will only return a limited report of vulnerabilities. You can go to to create a free account which will offer an unrestricted report.


You can perform a security analysis on any contract in any open file on Remix.

To perform an analysis:

  1. Click the MythX logo on the sidebar to open the MythX control panel (if it isn’t already open).

  2. Below the credentials section, there will be a select box containing a list of all applicable contracts. Select the one you wish to analyze and click the Analyze button.



    The contract may need to be compiled first, depending on the current Remix settings. Make sure the Solidity Compiler plugin for Remix is activated in your project. You will have to click the Solidity icon and then click the Compile button for your contract.

  3. The analysis may take a few minutes. When completed, a list of vulnerabilities will be displayed, along with a link to the SWC Registry for each vulnerability found.



    If you are running in Trial Mode, you will see a response here saying so. This means that some vulnerabilities may not be shown in the output.