The CData MCP Server for Marketo defines each connection to Marketo as a named configuration that Claude can use when sending natural language queries.

You create and manage these configurations using the MCP Configuration Tool, which automatically handles formatting, storage, and registration with Claude Desktop.

Understanding Connection Configurations

Each connection configuration is stored in a .mcp file, located in ~/AppData/Roaming/CData/Marketo Data Provider/, and includes the details needed to initialize the connector when Claude starts a session. For example, a connection called "MyConnection" is stored at ~/AppData/Roaming/CData/Marketo Data Provider/MyConnection.mcp.

The .mcp file is a text file containing a line-delimited list of connection properties, plus a timestamp. For example, MyConnection.mcp contains the following text:

#Tue May 20 15:48:40 EDT 2025
AuthScheme=Basic
User=myUser
Password=myPassword
Security Token=myToken

The configuration tool handles these settings automatically. Each saved configuration enables Claude to launch a dedicated MCP Server instance with the correct connector and options — no manual file editing required.

Connecting to Marketo

The following connection options are required when connecting to Marketo.

• URL: The URL of the REST API Service. You can locate this in Admin -> Integration -> Web Services -> REST API. Example values: https://123-abc-456.mktorest.com/ or https://123-abc-456.mktorest.com/rest.
• OAuthClientId: The OAuth Client ID associated with your custom service.
• OAuthClientSecret: The OAuth Client Secret associated with your custom service.

For additional connection options, see Connection String Options.

Obtaining OAuth Credentials

Before obtaining OAuth credentials you need to create a custom service if you do not already have one. To do so follow the instructions provided in Creating a Custom Service.

To obtain OAuth credentials for a custom service:

1. Go to the Admin tab.
2. Click on the LaunchPoint option.
3. Select the service and click on View Details.
4. Marketo displays a window that shows the authentication credentials. Use "Client Id" as the value for OAuthClientId and "Client Secret" for OAuthClientSecret.