Before you start
- MCP is enabled for your Variable account. Check the MCP URL row in Company settings. If it shows Not enabled, email us.
Add the connector
1
Open connector settings
Go to Customize -> Connectors, select + Add, then Add custom connector.If your organization manages connectors centrally, an owner adds it from Organization settings -> Connectors instead: select Add, hover over Custom, and select Web.
2
Enter Variable's details
Name the connector
Variable, enter https://app.variable.global/mcp as the URL, and select Continue. Keep the authentication settings Claude detects and select Continue again.3
Choose how people sign in
Variable registers each client automatically and doesn’t issue client secrets, so Register automatically is the option that works. Select Add.
4
Connect your Variable account
If an owner added Variable for your organization, go to Customize -> Connectors, find Variable (labelled Custom), and select Connect. Otherwise, Claude asks you to sign in the first time it calls Variable.A Variable sign-in window opens: sign in, pick the account to connect, and select Allow.
Use it in a conversation
Connectors are switched on per conversation. Select the + button at the lower left of the chat, open Connectors, and turn on Variable. Then try “list my Variable accounts”. Claude asks before it calls a tool. Variable’s tools can create, update, and delete data, so choose Allow always only for tools you’re happy for Claude to run without asking. To change the connector’s URL or sign-in settings, remove it from Connectors and add it again.Troubleshooting
For anything else, see the general troubleshooting table. Anthropic’s custom connector guide covers who can add connectors.