Use Codex with American Express Serve
BankSync's MCP server can let Codex query supported American Express Serve account data that you have connected through BankSync and authorized for API access. Query your finances in natural language without spreadsheets or exports.
BankSync is not affiliated with, endorsed by, sponsored by, or partnered with American Express Serve or Codex. Names are used only to describe potential account-data coverage and client compatibility.
How to connect Codex to American Express Serve
one key, every agent
Search for American Express Serve in BankSync
Sign up for BankSync and, if American Express Serve is available, link your account through a provider-hosted or bank-hosted authorization flow.
Generate an API key
Create an API key from the Developers section of your BankSync workspace.
Configure Codex
Add the BankSync MCP server to Codex using your API key. Follow our Codex setup guide for step-by-step instructions.
Start querying
Ask Codex about supported American Express Serve transactions, balances, and more using natural language.
Codex MCP Configuration
Add this configuration to let Codex query supported American Express Serve account data through BankSync.
[mcp_servers.banksync]
url = "https://mcp.banksync.io"
[mcp_servers.banksync.http_headers]
X-API-Key = "bsk_your_key_here"What Codex can access from American Express Serve
Accounts
List the American Express Serve accounts connected through BankSync and visible to the API key scopes you grant.
Transactions
Query supported American Express Serve transactions with provider-supplied dates, descriptions, amounts, merchants, and categories.
Balances
Get current and available balances for supported American Express Serve accounts.
Holdings
View supported investment positions, quantities, and market values from American Express Serve.
Trades
Access supported investment trade and activity history from American Express Serve.
Loans
Check supported loan balances and provider-supplied liability details from American Express Serve.
Ready to connect Codex to American Express Serve?
Start your 14-day free trial. Connect your bank, generate an API key, and start querying data in minutes.
Use American Express Serve with another agent
The same BankSync MCP server and API key work with every one of these.
- Use American Express Serve with ChatGPTOpenAI
- Use American Express Serve with Claude CodeAnthropic
- Use American Express Serve with Claude CoworkAnthropic
- Use American Express Serve with Claude DesktopAnthropic
- Use American Express Serve with CursorAnysphere
- Use American Express Serve with GeminiGoogle
- Use American Express Serve with GrokxAI
- Use American Express Serve with Hermes AgentNousResearch
Other banks you can use with Codex
Institutions in the same market that Codex can query through BankSync MCP.
- Use Cendera Bank (Bells, TX) - Business with Codex🇺🇸 United States
- Use Mid Penn Bank - Business with Codex🇺🇸 United States
- Use Bronco Federal Credit Union with Codex🇺🇸 United States
- Use Maps Credit Union with Codex🇺🇸 United States
- Use Emigrant Bank with Codex🇺🇸 United States
- Use Emigrant Direct with Codex🇺🇸 United States
- Use First Bank Richmond with Codex🇺🇸 United States
- Use Monzo (US) with Codex🇺🇸 United States
BankSync is not affiliated with, endorsed by, or an official partner of Codex or American Express Serve. All product names and trademarks are the property of their respective owners. Bank connections are established through regulated open banking providers.