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Integrations5 min readUpdated Apr 13, 2026

Connect Claude Desktop

Add Axiom as a Custom Connector in Claude so your assistant can make purchases on your behalf.

This guide walks you through connecting Axiom to Claude using a Custom Connector. Custom Connectors let Claude talk to remote MCP servers like Axiom directly from any Claude client, including Claude Desktop, claude.ai, and mobile. Once connected, Claude can make purchases for you through Axiom's secure virtual card system.

What you'll need

  • Claude Desktop or a claude.ai account (Pro, Max, Team, or Enterprise). Free plans are limited to one custom connector.
  • An Axiom account with a linked card and spending rules configured
  • About five minutes

Step 1: Open the Customize panel

In Claude Desktop, click Customize in the left sidebar.

The Claude Desktop sidebar with Customize highlighted

This opens the Customize panel where you can manage skills, connectors, and plugins.

The Customize panel in Claude Desktop

Click Connectors at the top of the panel.

Step 2: Add Axiom as a Custom Connector

On the Connectors page, click the "+" button and select "Add custom connector" from the dropdown.

The Connectors page with the Add custom connector dropdown open

A modal will appear asking for a Name and Remote MCP server URL.

The Add custom connector modal with empty fields

Enter Axiom as the name and paste the MCP server URL:

MCP Server URL

https://mcp.useaxiom.ai/mcp

The Add custom connector modal filled out with Axiom's details

Click Add.

Step 3: Authorize the connection

After adding the connector, Claude will show a connection dialog for Axiom. Click Connect to begin the authorization flow.

The Connect to Axiom dialog showing the MCP server URL and a Connect button

You'll be taken to Axiom's authorization page. Review the permissions Claude is requesting, then click Approve.

The requested permissions include: Account Access, View Rules, Payment Details, View Transactions, and Update Transactions.

The Axiom OAuth authorization screen showing requested permissions

Once approved, you'll be redirected back to Claude. Axiom will appear in your Connectors list as connected, with all its tools available.

Axiom connected in Claude showing available tools like create_disposable_inbox, list_transactions, and more

Step 4: You're all set!

Axiom is connected and ready to go. Open a new conversation in Claude and try it out. Ask something like "Is my Axiom account connected?" and watch Claude call Axiom's tools in real time.

A Claude conversation using Axiom tools to check account status

Claude now has access to your full Axiom toolkit: checking spending rules, reviewing transactions, issuing virtual cards, and making purchases on your behalf. All within the guardrails you've configured.

Ready to put it to work? Browse our recipes for step-by-step agent workflows like snagging a deal, tracking a price drop, or buying a gift. Or jump straight in and ask Claude to make a small test purchase to see the full flow in action.

Troubleshooting

  • Claude doesn't show Axiom tools. Make sure you've completed the authorization flow. Go to Customize → Connectors and check that Axiom shows as connected.
  • Connection fails. Verify the remote MCP server URL matches what's shown below. You can check or update it in Customize → Connectors.
https://mcp.useaxiom.ai/mcp
  • Authentication errors. Your OAuth session may have expired. Go to Customize → Connectors, disconnect Axiom, and reconnect it.
  • Purchase blocked. Verify your spending rules allow the category and amount you're trying to purchase.