> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zapier.com/llms.txt
> Use this file to discover all available pages before exploring further.

# MCP tools return "not found" (404) errors

> Fix 404 errors from Zapier MCP tools caused by an expired connection token.

If Zapier MCP tools start returning `404` errors after working previously, the connection token stored by your AI client has likely expired. This issue only affects AI clients that store a connection token in their configuration.

## Symptom

Your MCP tools stop working and return `404` (`not found`) errors when your AI client tries to use them.

## Causes

The connection token stored in your AI client's configuration is no longer valid. The token can become invalid over time, particularly after long periods of inactivity or after a security event. Once the token is invalid, the saved server URL can no longer authenticate tool calls.

## How to fix it

Generate a new connection token and replace the saved one in your AI client:

<Steps>
  <Step title="Open your server">
    Go to the [Zapier MCP dashboard](https://mcp.zapier.com/) and select your server.
  </Step>

  <Step title="Go to the Connect tab">
    Select the **Connect** tab.
  </Step>

  <Step title="Rotate your token">
    Select **Rotate token** to generate a new connection token.
  </Step>

  <Step title="Update your client">
    Update the server URL in your **AI client's configuration**.
  </Step>

  <Step title="Restart">
    Restart your AI client.
  </Step>
</Steps>

<Warning>
  Your connection token is like a password. Do not share it, as anyone with the token can run your actions and access your data. If you believe your token has been exposed, rotate it immediately.
</Warning>

## Still need help?

* [Ask in the Zapier Community](https://community.zapier.com/) for advice from experienced Zapier users.
* [Contact the Zapier MCP team](https://mcp.zapier.app/home) for feedback or help.