Overview
FullEnrich MCP uses the Model Context Protocol (MCP) to connect ChatGPT directly to your FullEnrich account.
The integration works through ChatGPT’s Developer Mode, which allows custom apps built on MCP servers from third-party providers like FullEnrich.
Once enabled in a conversation, ChatGPT can:
Search for contacts
Enrich them with verified emails and phone numbers
Export results to CSV
Authentication is handled via OAuth, so no API keys or manual configuration are required.
Before You Start
Make sure you have:
A FullEnrich account
A ChatGPT Plus, Pro, Team, Enterprise, or Edu plan (not available on the free plan)
Access to ChatGPT via the web or desktop app
Step-By-Step Setup
Step 1: Open ChatGPT Settings
Open ChatGPT
Click your profile icon
Select Settings
Step 2: Enable Developer Mode
In Settings, click Applications in the left sidebar
Find Developer Mode and toggle it ON
Note: ChatGPT will display a high-risk warning when enabling Developer Mode. This is expected, as it allows custom MCP servers from external providers. FullEnrich is a trusted provider.
Step 3: Create a new app
Click Create an app at the top of the Applications page
Step 4: Fill in the app details
Enter the following details:
Name: FullEnrich MCP
MCP server URL: https://mcp.fullenrich.com/mcp
Leave Advanced settings empty.
Check I understand and wish to continue
Click Create
Tip: ChatGPT automatically detects OAuth when using the FullEnrich URL. No additional setup is required.
Step 5: Find FullEnrich in your Drafts
Go to Settings → Applications
Find FullEnrich MCP under Drafts (marked DEV)
This confirms the app was created successfully.
Step 6: Authenticate with FullEnrich
A browser window will open automatically
Sign in with your FullEnrich account
Authorize access
Return to ChatGPT
Step 7: Enable FullEnrich in a conversation
Open a new chat in ChatGPT
Click the + button near the message input
Select Connectors
Go to the Custom MCP tab
Select FullEnrich MCP
A green checkmark confirms the connection is active.
Step 8: Test the connection
Type the following in the chat:
Check my FullEnrich credits
If ChatGPT returns your credit balance, the setup is complete.
Refreshing tools
If FullEnrich adds new tools or updates its API, you can refresh the connector:
Go to Settings → Applications
Click FullEnrich MCP under Drafts
Click Refresh
What you can do next
Once connected, you can:
Search contacts by role, company, industry, or location
Enrich contacts with professional emails or phone numbers
Export contacts or companies to CSV
For the full list of tools, see the FullEnrich MCP Server article.
Troubleshooting
I don’t see the Applications option in Settings
Custom MCP apps require a paid ChatGPT plan (Plus, Pro, Team, Enterprise, or Edu). Upgrade your plan to access this feature.
I don’t see Developer Mode
Try using ChatGPT on the web or desktop app. Developer Mode may not yet be available in all regions.
The authentication window opened but nothing happens
Close the browser tab after signing in
Return to ChatGPT
The connection should complete automatically
FullEnrich does not appear in the Custom MCP tab
Make sure Developer Mode is still enabled
Confirm the app was created successfully (it should appear under Drafts)
Need Help?
Email: [email protected]
Chat: available on fullenrich.com