Connect ReactIn to Claude (MCP)

Written By François Delporte

Last updated 2 days ago

ReactIn's MCP connector lets you drive your LinkedIn campaigns, lists, and leads directly from Claude, in natural language. You ask, Claude executes through your ReactIn account: create a lookalike list, launch a campaign, analyze your outreach metrics, and more.

This page explains how to set it up in just a few minutes, with no code.

Prerequisites

An active ReactIn account with at least one organization
Access to Claude on claude.ai, the desktop app (Mac/Windows), or the mobile app (iOS/Android)
ReactIn's MCP server URL: https://app.reactin.io/mcp

Custom connectors are a beta feature on Claude's side. The exact location of menus may change slightly.

Installing on Claude (web and desktop)

Step 1: Open Connectors

In Claude, open the Customize panel from the sidebar, then select the Connectors tab.

Step 2: Add a custom connector

In the top right of the connector list, click the + button.

Step 3: Enter ReactIn's details

In the Add custom connector window, enter:

Name: ReactIn
URL: https://app.reactin.io/mcp

NB: The OAuth Client ID and OAuth Client Secret fields under "Advanced settings" are optional: leave them empty. Authentication happens automatically during the connection step.

Step 4: Connect

ReactIn now appears in the list, under the Not connected section. Select it, then click Connect.

Step 5: Authorize access

A ReactIn window opens: Authorize access. Make sure Claude is requesting access to the correct organization (for example, Figue), then click Authorize.

That's it. ReactIn moves to the active connectors section, and its tools are available in your conversations.

Installing on Claude mobile (iOS / Android)

The process is identical, with navigation adapted for mobile:

Open the menu (icon in the top left), then Settings → Connectors.
Tap Add connector (or the + icon).
Enter the name ReactIn and the URL https://app.reactin.io/mcp, then confirm.
Tap Connect, then Authorize on the ReactIn screen.
The OAuth authorization opens in the built-in browser. Once confirmed, return to the Claude app: the connector is active.

Verify that everything works

Ask Claude a simple question to confirm the connection, for example:

"List my ReactIn organizations."

If Claude returns to your organization, the connector is up and running.

Usage examples

Once connected, you can drive ReactIn in natural language from Claude.

Create a lookalike list

"Create a lookalike list based on this Profile: [LinkedIn profile URL]."

Other examples

"Show me the active campaigns and their reply rate this week."

"Add these 15 profiles to my SaaS Prospects list."

"Which job titles replied the most this month?"

Security and best practices

Only add connectors from developers you trust. Anthropic does not control third-party tools and cannot guarantee their behavior.
OAuth authorization gives Claude access to your data and to all your ReactIn organizations. Check the scope before confirming.
You can disconnect ReactIn at any time from the Connectors tab (connector menu → Disconnect).

Troubleshooting

Problem	Likely cause	Solution
"You're not connected to ReactIn yet" persists	OAuth authorization not completed	Click Connect again and follow the Authorize screen all the way through
Claude doesn't see your ReactIn tools	Connector added but not connected	Check that it appears in the active connectors section, not under "Not connected"
Wrong organization used	Multiple organizations on the account	Specify the organization in your request, or reconnect by selecting the right one
The connector doesn't appear	Incorrect URL	Check the exact URL: `https://app.reactin.io/mcp`

Need help?

If the connection fails despite these steps, contact ReactIn support (hello@reactin.io) with a screenshot of the error displayed.