How to Use the Mercury MCP in Claude

Q: How do I connect Mercury to Claude Desktop?

Open your claudedesktopconfig.json file and add the Mercury MCP Server under the mcpServers block. Provide your Vinkius credentials and API token, restart Claude Desktop, and look for the hammer icon in your chat box.

Q: Can Claude Desktop initiate transfers using the Mercury MCP Server?

No, this integration only exposes read-only tools like listtransactions and getbalance. Your money stays safe because the configuration doesn't support write operations or payment execution.

Q: How does Claude Desktop handle large transaction histories?

When you call listtransactions, the tool fetches the most recent ledger entries first. You can ask your agent to filter the list by date or account ID to find specific records without hitting rate limits.

Check your startup's cash flow, transactions, and invoice pipelines right inside Claude Desktop without context-switching.

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Connect Mercury MCP to Claude Desktop

Create your Vinkius account to connect Mercury to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Mercury with Claude Desktop

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Track balances directly in Claude Desktop

The `list_accounts` tool pulls your active Mercury bank accounts straight into your Claude Desktop chat window. You get immediate visibility into your runway without loading a separate browser tab or logging into a bank portal. Once you have the account list, use `get_balance` to pull the exact cash position of any specific account. Your agent reads the raw numbers instantly to answer questions about your current burn rate or runway.

Monitor team cards and recipients

The `list_cards` tool lets Claude Desktop audit your team's active corporate cards. You can spot active plastic or virtual cards in seconds, making it easy to see who is spending what. Pair this with `list_recipients` to review who is set up to receive outgoing wires or ACH payments. It gives your agent the exact data needed to verify vendor details before you draft your next payment.

Audit Mercury transactions using this MCP Server

The `list_transactions` tool exposes every transaction on your ledger directly to your local Claude Desktop environment. You can ask your agent to find specific charges, flag duplicate transactions, or categorize your monthly spend. For incoming revenue, `list_invoices` and `list_customers` let you cross-reference outstanding receivables. Your agent checks who still owes you money and matches those invoices against completed transactions.

Setup guide

Set up Mercury MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The Mercury MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the Mercury MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under mercury-alternative-mcp.

json

{
  "mcpServers": {
    "mercury-alternative-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mercury. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Mercury MCP in Claude Desktop

Open your `claude_desktop_config.json` file and add the Mercury MCP Server under the `mcpServers` block. Provide your Vinkius credentials and API token, restart Claude Desktop, and look for the hammer icon in your chat box.

No, this integration only exposes read-only tools like `list_transactions` and `get_balance`. Your money stays safe because the configuration doesn't support write operations or payment execution.

No, you can run this setup on the free tier of the desktop app. Just configure the local MCP setup, and your local agent will gain access to tools like `list_accounts` immediately.

When you call `list_transactions`, the tool fetches the most recent ledger entries first. You can ask your agent to filter the list by date or account ID to find specific records without hitting rate limits.

Yes, your bank account balances and transaction histories stay secure because Vinkius runs the server in an isolated sandbox. Only your local Claude Desktop client accesses the API, and your credentials are never exposed to public LLMs.

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