A Citi API for your own accounts.
Connect Citi once with a login on its own site. Read your transactions, balances, investment holdings, investment trades, and loan balances as JSON with a scoped key, or ask an AI agent over MCP. No business required.
- read-only
- 2 years of history
- from $7/mo
Citi
US · Plaid$curl https://api.banksync.io/v1/banks/bnk_citi/accounts/acc_5068/transactions?from=2026-09-01 \ -H "X-API-Key: bsk_live_…" { "success": true, "data": [ { "date": "2026-10-08", "description": "Trader Joe's #552", "amount": -63.18, "category": "Groceries" }, { "date": "2026-10-07", "description": "Shell Oil 5741", "amount": -48.02, "category": "Transport" }, …52 more ], "meta": { "count": 54, "hasMore": false }}200 OK · 54 rows · 112 ms
Citi and personal API access
Citi does not hand customers an API key for their own accounts; the supported route is a Plaid-connected OAuth login, which is what BankSync uses.
You sign in on Citi’s own screen and approve access; the connection runs through Plaid, and BankSync never sees your password. Your key reads the data back as JSON.
What you get in United States
- Data
- Transactions, balances, investment holdings, investment trades, and loan balances. Read-only.
- History
- Up to 2 years on the first sync.
- Consent
- Does not expire. Disconnect any time.
- Framework
- CFPB §1033 Open Banking · Consumer Financial Protection Bureau (CFPB)
- Provider
- Connections run through Plaid. CFPB §1033 compliance dates were stayed in October 2025, so access today runs on the bank’s and the provider’s data-sharing agreements.
How it works
- 1
Connect your own bank
Sign up, then connect Citi through your bank's own consent screen.
- 2
Create an API key
Workspace › Developers. Give it only the scopes it needs; revoke it any time.
banks:read - 3
Make your first call
Read transactions, balances, investment holdings, investment trades, and loan balances as JSON with one GET request and your key in the X-API-Key header.
- 4
Or ask an AI agent
Point Claude, ChatGPT or Cursor at the MCP server and ask questions about the same data.
MCP
Call it your way
$curl -s "https://api.banksync.io/v1/banks/bnk_citi/accounts/acc_5068/transactions?from=2026-09-01" \ -H "X-API-Key: bsk_live_…" \ | jq '.data[] | {date, description, amount}'
import osimport requests r = requests.get( "https://api.banksync.io/v1/banks/bnk_citi/accounts/acc_5068/transactions", params={"from": "2026-09-01"}, headers={"X-API-Key": os.environ["BANKSYNC_API_KEY"]},)r.raise_for_status()for row in r.json()["data"]: print(row["date"], row["description"], row["amount"])
const res = await fetch('https://api.banksync.io/v1/banks/bnk_citi/accounts/acc_5068/transactions?from=2026-09-01', { headers: { 'X-API-Key': process.env.BANKSYNC_API_KEY },})if (!res.ok) throw new Error(`BankSync API ${res.status}`)const { data } = await res.json()console.table(data)
you ›What did I spend on groceries last month across my cards?mcpget_transactions({ bankId: "bnk_citi", accountId: "acc_5068", from: "2026-09-01" })agent ›$612.40 across 17 transactions: Trader Joe’s $341.90, Costco $270.50. — same key, same data, in Claude, ChatGPT or Cursor —
API access from $7/mo
Standard includes 5 bank connections, 10 API requests a minute and the MCP server. Every plan starts with a 14-day free trial. Prices shown in USD.
Frequently asked questions
Does Citi offer a personal API?
Citi does not hand customers an API key for their own accounts; the supported route is a Plaid-connected OAuth login, which is what BankSync uses.
What data can I read from my Citi accounts?
Transactions, balances, investment holdings, investment trades, and loan balances, read-only, as JSON. The first sync reaches back up to 2 years of transactions, depending on how much Citi makes available.
How long does consent last?
No scheduled expiry: a US connection does not expire. Citi may occasionally ask you to sign in again (a new device check or a password change); the app asks you to reconnect when that happens. You can disconnect at any time.
Is the API read-only?
Yes. The connection your bank grants is read-only: BankSync can read account data, and it cannot move money, make payments or change anything at your bank. Your API key reads the same data, scoped to the permissions you give it.
Can I use my Citi data with Claude or ChatGPT?
Yes. The same read-only data is available over BankSync’s MCP server: point Claude, ChatGPT or Cursor at it and ask about your Citi transactions in plain English. It is included from the Standard plan.
What about Citi business accounts?
Which business and commercial accounts Citi shares varies, so we do not promise them here. Contact support with your account type before you rely on it, and we will tell you what connects.
Other US banks
The same key reads every bank you connect.
Related reading
- US bank API →What the API returns in United States, plans and the full endpoint list.
- Citi on BankSync →How Citi connects, the data it returns and where you can send it.
- US bank coverage →Every US bank you can connect, with the data each one returns.
- MCP server →The same data in Claude, ChatGPT, Cursor and VS Code.
Read your Citi data tonight
Connect Citi, create a scoped key, and read your own data as JSON.