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All three options use the same server URL:

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Claude.ai and Claude Desktop

1

Open connectors

In Claude, go to Customize → Connectors and choose + Add. On Team and Enterprise plans, an organization Owner adds the connector first under Organization settings → Connectors, and members then choose Connect.
2

Add a custom connector

Choose Add custom connector. Name it LeadLex and paste the server URL above.
3

Sign in to LeadLex

Claude opens a LeadLex sign-in and consent screen. Approve the access. Claude registers itself with LeadLex automatically, so you do not need a client id or secret.
4

Try it

Start a chat and ask: “What is in my pipeline this week?”
Menu names change between Claude releases. Custom connectors are available on the Free, Pro, Max, Team and Enterprise plans. Free accounts can add one. On Team and Enterprise, only certain roles can add them, so if you do not see Add custom connector, ask your workspace admin.

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Claude Code

Add the server with one command:
Then run /mcp inside Claude Code, select leadlex and follow the sign-in. To use a workspace API key instead of OAuth:
Some tools need a signed-in user and refuse an API key. See Authentication.

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Disconnect

Remove the connector in Claude. To revoke the grant on the LeadLex side, open Settings, then API & Integrations, then Connected AI Assistants in the LeadLex dashboard.