# Mercury (MCP Server)

> Read-only access to Mercury business banking accounts and transactions

- Type: MCP server
- Publisher: Mercury (official)
- Categories: Finance, Business
- Website: https://docs.mercury.com/docs/connecting-mercury-mcp
- Docs: https://docs.mercury.com/docs/supported-tools-on-mercury-mcp
- Transport: streamable-http
- Server URL: https://mcp.mercury.com/mcp
- Sign-in: oauth
- Listed: 2025-09-01

## About

Mercury's official remote MCP server provides read-only access to business banking data including accounts, balances, transactions, cards, recipients, statements, treasury and invoices. It uses OAuth with time-limited tokens and cannot initiate transactions or modify data.

## Install

1. **Connect it in ChatGPT** Turn on Developer mode in ChatGPT (Settings → Security and login), open Plugins, select + and paste https://mcp.mercury.com/mcp as the MCP server URL, then sign in with OAuth. Add it to a chat from the composer's tools menu.

2. **Or add it to Codex or the API**

   Codex CLI:

   ```bash
   codex mcp add mercury --url https://mcp.mercury.com/mcp
   codex mcp login mercury
   ```

   config.toml:

   ```toml
   [mcp_servers.mercury]
   url = "https://mcp.mercury.com/mcp"
   ```

   Responses API:

   ```python
   import os
   from openai import OpenAI
   
   client = OpenAI()
   
   response = client.responses.create(
       model="gpt-6-astra",
       tools=[{
           "type": "mcp",
           "server_label": "mercury",
           "server_url": "https://mcp.mercury.com/mcp",
           "authorization": os.environ["MERCURY_API_KEY"],
           "require_approval": "never",
       }],
       input="What are my current balances across all Mercury accounts?",
   )
   print(response.output_text)
   ```

## Tools

- `getAccounts`
- `getAccount`
- `listTransactions`
- `getTransaction`
- `getAccountStatements`
- `listCards`
- `getRecipients`
- `getTreasury`
- `getTreasuryTransactions`
- `listInvoices`
- `listCustomers`
- `getOrganization`

## Example prompts

- "What are my current balances across all Mercury accounts?"
- "List transactions over $1,000 from last month"
- "Show my treasury holdings"
- "Which invoices are still unpaid?"

## Also available as

- app: [Mercury](https://chatgptplugins.directory/apps/mercury.md)

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Source: https://chatgptplugins.directory/mcp/mercury · Index: https://chatgptplugins.directory/llms.txt · Independent and community-run. Not affiliated with or endorsed by OpenAI. ChatGPT is a trademark of OpenAI.