Skip to main content
MCP connections let you connect custom MCP servers to your Base44 account so the AI chat can access external tools and data for context while you build. You configure MCP connections once per account, and they are available in the AI chat for every app in every workspace your account can access.
You need a Builder plan or higher to connect custom MCPs.
Adding custom MCP connections to your Base44 account

Adding custom MCP connections to your Base44 account

​
What you can use MCPs for

MCPs work best when you want to bring real, structured data from a third-party service into your app build. Common examples include:
  • Amplitude or Mixpanel: Build dashboards pre-loaded with your actual product metrics
  • Linear or Jira: Scaffold a project tracker from your real backlog and issue structure
  • Salesforce or HubSpot: Build CRM apps that reflect your live data model
  • Figma: Pull design components and apply them while building
  • Internal MCP servers: Connect proprietary tools, enforce company dev guidelines, or load enterprise-specific data schemas

Use Base44 from Claude, ChatGPT, or Cursor

Base44 also works in the other direction. Connect Base44 as an MCP server so external AI tools like Claude, ChatGPT, and Cursor can create and manage your apps directly.

​
How MCP connections work

Base44’s AI treats MCP connections as tools it can call when your request requires external data or actions. It decides when to use them based on your prompt and the MCP’s description. You do not have to name an MCP explicitly, but it usually works best if you say what you want to use, such as “Use the GitHub MCP to list open issues.” Each connection stores the server URL, authentication method, and any headers that need to be sent with every request.
Using MCP connections can increase your credit usage, because the AI processes more information when it connects to external apps and data sources.

​
Adding a custom MCP connection

Each account can connect up to 20 MCP servers. If you reach this limit, you must remove an existing server to add a new one. To add a custom MCP connection:
  1. Click your profile icon at the top-right of Base44.
  2. Click Settings.
  3. Under Account, click MCP connections.
  4. Click Add custom MCP.
  5. Enter the details for your MCP:
    • Name: Enter a clear name for your MCP server so collaborators can recognize it.
    • URL: Enter the MCP server URL, such as https://mcp.deepwiki.com/sse.
    • Authentication: Choose how Base44 should connect:
      • Not required: Select this option if the server does not require credentials.
      • OAuth: Select this option if the server uses OAuth. You complete the authorization in the next step after testing and adding the server.
    • Custom headers (optional): Add any headers that need to be sent with every request, such as API keys:
      1. Click Add header.
      2. Enter the Header name.
      3. Enter the Header value.
Add a header only if your MCP server requires one, such as an API key or bearer token. Check your MCP server or API documentation to see if a header is needed. If nothing is mentioned, leave this section empty and test the connection.
  1. Click Test to check that Base44 can reach the MCP server with the configuration you entered.
  2. Click Test & add to test the connection and save the new MCP server to your account.
Adding a custom MCP

Adding a custom MCP

​
Turning a custom MCP on or off

Turn an MCP connection on or off without removing its configuration. To turn a custom MCP connection on or off:
  1. Click your profile icon at the top-right of Base44.
  2. Click Settings.
  3. Under Account, click MCP connections.
  4. Find the relevant MCP server in the list.
  5. Click the toggle on the right to enable or disable that server for your account.

​
Editing or removing a custom MCP

Make changes to an existing MCP connection or remove it completely from your account.
Managing an MCP connection

Managing an MCP connection

To edit or remove a custom MCP connection:
  1. Click your profile icon at the top-right of Base44.
  2. Click Settings.
  3. Under Account, click MCP connections.
  4. Next to the relevant MCP server, click the More actions icon.
  5. Choose what you want to do:
    • Edit Details: Update the server name, URL, authentication, or custom headers, then save your changes.
    • Remove MCP: Permanently remove the MCP server from your account.
Use clear, descriptive names for each MCP server so collaborators can quickly see which external tools or data sources the AI chat can use.

​
FAQs

Click a question below to learn more about MCP connections.
No. MCP connections only control what the AI chat can access while you build. Your app code, APIs, and other integrations do not call MCP servers through this settings page.The AI chat uses an MCP server only when your prompt asks for something that requires that server. It does not call every connected MCP for each message.
No. MCP connections are only available in the editor chat while you build. They cannot be called from app flows, automations, backend functions, or via invokeLLM at runtime. If you need to connect to an external service from within your live app, use connectors instead.
No. When the AI uses an MCP to fetch data while you build, that data is written into your app at build time. It does not refresh automatically when your published app is running. If you need live data in your app, connect the data source as a connector or custom integration instead.
Try the following steps in order:
  1. Go to Settings → MCP connections and confirm the MCP is toggled on.
  2. Click Test next to the MCP server to check that Base44 can still reach it.
  3. If the MCP uses OAuth, try re-authenticating. Your session may have expired.
  4. Check that the server URL and any custom headers are still correct.
  5. Be explicit in your prompt. Name the MCP and describe what you need it to fetch, for example: Use the GitHub MCP to list open issues.
To define shared rules and best practices for how the AI builds apps in a workspace, use workspace skills.Learn how to add skills.
Yes. Go to Settings → MCP connections and use the toggle next to the relevant MCP server to turn it off. When it is off, the AI chat no longer uses that server.You can turn the same server back on later without re-entering its configuration.
Any collaborator who can open the AI chat for an app you can access can benefit from your MCP connections in that chat. Because MCP connections are configured per account, they are available in all apps and all workspaces that your account has access to. The AI decides when to use each MCP based on the prompt and the MCP configuration.
Base44 exposes its own MCP server so external AI tools can interact with your workspace directly. See Using Base44 as an MCP server for setup instructions for each supported client.
No. The Base44 MCP server supports direct connections from Claude, ChatGPT, and Cursor only. Third-party MCP gateway tools are not supported at this time.