Skip to main content
Each app on your Zapier MCP server has actions that your MCP client can call as tools. You can configure how Zapier runs each of those actions. There are two settings:
  • Field values: Control how each field on an action gets its value. You can set a field to a specific value, let the AI fill it in, or limit the AI to a set of choices. For example, set a Salesforce action so it always assigns new leads to the same owner.
  • Default connection: Choose which app connection an app uses when its actions run. For example, set your work Gmail as the default instead of your personal one.
These settings work in both agentic and managed mode.

​
Before you begin

  • A Zapier MCP server. You must be the owner of the server.
  • The action you want to configure is already on the server.

​
Set field values

Each field on an action has a dropdown that controls how it gets its value. The options that appear depend on the field type. To set field values for an action:
  1. Go to mcp.zapier.com and select your server.
  2. Select the navApps Apps tab and find the action you want to change.
  3. Click the ⋮ menu next to the action and select navCog Configure.
  4. For each field, select an option from the dropdown.
  5. If the option you selected requires a value, enter it.
  6. Click Save.
The setting takes effect immediately. Your MCP client does not need to reconnect.

​
Set the default connection

You can set one default app connection per app on your server. Every action for that app then uses it. You can also override the default for a single action.

​
Change the default for an app

  1. Click the ⋮ menu next to the app name (not the one next to an individual action).
  2. Select navCog Manage connection.
  3. Select an existing connection from the dropdown, or add a new one.
  4. Click Set default connection.
If your server uses agentic mode, you can also set the default connection by asking your agent in the chat. For example: “Set my work Gmail as the default connection.”

​
Override the default for a single action

  1. Click the ⋮ menu next to the action and select navCog Configure.
  2. In the connection dropdown, select a different connection.
  3. Click Save.
To go back to the app’s default, select Use default from the connection dropdown.

​
What these settings do not change

  • Admin controls still apply. These are your personal settings for how your agent acts. Account-level app and action restrictions set by an admin are enforced separately.

How Zapier MCP tools work

What actions and tools are, and how agentic and managed mode work.

App connections on Zapier

What app connections are, how authentication works, and how to manage them.

Security

How admin controls apply to Zapier MCP.
Last modified on October 22, 2026