Use Codex with Capital One
BankSync's MCP server can let Codex query supported Capital One 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 Capital One or Codex. Names are used only to describe potential account-data coverage and client compatibility.
How to connect Codex to Capital One
Search for Capital One in BankSync
Sign up for BankSync and, if Capital One 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 Capital One transactions, balances, and more using natural language.
Codex MCP Configuration
Add this configuration to let Codex query supported Capital One 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 Capital One
Accounts
List the Capital One accounts connected through BankSync and visible to the API key scopes you grant.
Transactions
Query supported Capital One transactions with provider-supplied dates, descriptions, amounts, merchants, and categories.
Balances
Get current and available balances for supported Capital One accounts.
Holdings
View supported investment positions, quantities, and market values from Capital One.
Trades
Access supported investment trade and activity history from Capital One.
Loans
Check supported loan balances and provider-supplied liability details from Capital One.
Ready to connect Codex to Capital One?
Start your 14-day free trial. Connect your bank, generate an API key, and start querying data in minutes.
Use Capital One with another agent
The same BankSync MCP server and API key work with every one of these.
- Use Capital One with ChatGPTOpenAI
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- Use Capital One with Claude DesktopAnthropic
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- Use Capital One with GeminiGoogle
- Use Capital One with GrokxAI
- Use Capital One with Hermes AgentNousResearch
Other banks you can use with Codex
Institutions in the same market that Codex can query through BankSync MCP.
- Use Chase with Codex🇺🇸 United States
- Use American Express with Codex🇺🇸 United States
- Use Wells Fargo with Codex🇺🇸 United States
- Use Fidelity with Codex🇺🇸 United States
- Use Citibank Online with Codex🇺🇸 United States
- Use Bank of America with Codex🇺🇸 United States
- Use PayPal with Codex🇺🇸 United States
- Use Bank of America - Charitable Gift Fund with Codex🇺🇸 United States
BankSync is not affiliated with, endorsed by, or an official partner of Codex or Capital One. All product names and trademarks are the property of their respective owners. Bank connections are established through regulated open banking providers.