swedbank-json

A modern TypeScript port of walle89/SwedbankJson that interacts with Swedbank's mobile APIs. It supports Mobile BankID QR login, session caching, cookie management, account overview, transaction previews, and complete transaction history with pagination.

This project is not affiliated with Swedbank or Sparbanken. Use for personal/educational purposes only.

Table of Contents

• Features
• Installation
• Authentication: Mobile BankID QR Login
• Fetch Accounts
• Fetch Transactions
• Directory Structure
• Environment Variables
• Error Handling
• Debug Logging
• Full API Reference
• Contributing
• License

Features

• Mobile BankID QR and same-device login
• Session caching & cookie persistence (persist the returned session to skip QR on the next run)
• Built-in Mobile app headers (User-Agent, X-Client, Authorization) with AppData cache
• Accounts overview, reminders, savings portfolios
• Transaction preview (accountTransactions) and full history pagination (getFullTransactionHistory)
• Transfers, quick balance subscriptions, and transaction detail lookups
• Written in modern TypeScript with rich TSDoc for IDEs

Installation

npm install swedbank-json

TypeScript/ESM import:

import { loginWithBankID, SwedbankClient } from "swedbank-json";

CommonJS require:

const { loginWithBankID, SwedbankClient } = require("swedbank-json");

Authentication: Mobile BankID QR Login

import { loginWithBankID, SwedbankClient } from "swedbank-json";

async function main() {
  const { auth, session } = await loginWithBankID({
    personnummer: "YYYYMMDDXXXX", // optional for QR, required for same-device
    bankApp: "sparbanken",
    cachePath: "./cache/session.json", // where you persist the session/AppData cache
    sameDevice: false, // set true to deep-link to the BankID app instead of QR
  });

  // Render QR by polling in your own loop (pseudo):
  const status = await auth.pollStatus();
  console.log(status.imageChallengeData); // base64 for animated QR frames

  await auth.verify(); // waits for COMPLETE

  const client = new SwedbankClient(auth);
  const accounts = await client.accountList();
  console.log(accounts.transactionAccounts.map((a: any) => a.name));
}

Valid bankApp values: swedbank, sparbanken, savingsbank, swedbank_foretag, sparbanken_foretag.

Session caching behavior

• loginWithBankID returns { auth, session }. Persist session to disk (e.g., fs.writeFileSync("./cache/session.json", JSON.stringify(session))).
• On the next run, load the JSON and pass it to new SwedbankClient(loadedSession) to reuse cookies/user agent without scanning a new QR (until Swedbank expires the session).
• App metadata (User-Agent/AppID) is also cached to the cachePath so repeat runs avoid remote lookups.

Cookie handling

• All Set-Cookie headers are merged into the in-memory session and reused on subsequent requests.
• When you persist session, those cookies are preserved and replayed when you reconstruct SwedbankClient with the saved session.

Fetch Accounts

const client = new SwedbankClient(auth);
const overview = await client.accountList();

// Transaction accounts
for (const account of overview.transactionAccounts) {
  console.log(`${account.name} (${account.id}) -> balance: ${account.balance.amount} ${account.balance.currency}`);
}

// Savings/investments
if (overview.savingsAccounts) {
  console.log(`You have ${overview.savingsAccounts.length} savings accounts`);
}

Account categories commonly present in engagement/overview:

• transactionAccounts: Current/checking accounts
• savingsAccounts: Savings & investment accounts
• cardAccounts: Credit card accounts
• loans: Loan products (mortgage, consumer loans)

Fetch Transactions

Basic preview (single page):

const accountId = overview.transactionAccounts[0].id;
const page = await client.accountTransactions(accountId, 40, 1);
console.log(page.transactions.length); // Up to ~40, depending on the API default

Full history with pagination (recommended):

const allTransactions = await client.getFullTransactionHistory(accountId);
console.log(`Fetched ${allTransactions.length} transactions`);

// Example: find the latest card charge
const latestCard = allTransactions.find((t) => t.type === "CARD");
console.log(latestCard);

getFullTransactionHistory follows Swedbank's links.next.uri pagination until moreTransactionsAvailable is false, so you get the complete list the API exposes.

Directory Structure

├─ src/              # TypeScript sources with rich TSDoc
│  ├─ auth/          # Mobile BankID, security token, and unauth flows
│  ├─ swedbank/      # SwedbankClient and high-level banking helpers
│  ├─ http/          # HTTP wrapper with headers/cookies
│  ├─ appdata/       # AppData cache (User-Agent/AppID)
│  └─ index.ts       # Public entrypoint (loginWithBankID, exports)
├─ dist/             # Compiled JavaScript + type declarations (npm publishes this)
├─ cache/            # (suggested) store session JSON and AppData cache here
├─ test/             # Vitest tests
├─ package.json
├─ tsconfig.json
└─ README.md

Environment Variables

.env example (with dotenv):

SWEDBANK_PERSONNUMMER=YYYYMMDDXXXX
SWEDBANK_BANKAPP=sparbanken
SWEDBANK_CACHE_PATH=./cache/session.json
SWEDBANK_SAME_DEVICE=false
SWEDBANK_DEBUG=1

Usage:

import "dotenv/config";
import { loginWithBankID } from "swedbank-json";

const { auth } = await loginWithBankID({
  personnummer: process.env.SWEDBANK_PERSONNUMMER,
  bankApp: process.env.SWEDBANK_BANKAPP || "swedbank",
  cachePath: process.env.SWEDBANK_CACHE_PATH || "./cache/session.json",
  sameDevice: process.env.SWEDBANK_SAME_DEVICE === "true",
});

Error Handling

Common errors thrown by the client:

• Unable to use Mobile BankID. Check if the user has enabled Mobile BankID. – initiation failed
• Mobile BankID verification timed out. User did not complete authentication in time. – QR not scanned within timeout
• The user is not a customer in Swedbank... or ...Sparbanken – profile selection mismatches the chosen bankApp
• Not a valid AccountID / Not a valid DetailsTransactionID – invalid identifiers passed to account/transaction endpoints
• There are no registered transactions to confirm. – attempting to confirm transfers when none exist
• PROFILE_SELECTION_NEEDED / MULTIPLE_PROFILES – some users must select a profile; use selectProfileIfNeeded or set profileID

Catch errors around your calls to provide better user messaging or retries.

Debug Logging

Set SWEDBANK_DEBUG=1 to log request URLs, headers, cookies, and short response excerpts. By default, the client is quiet aside from thrown errors.

SWEDBANK_DEBUG=1 node your-script.js

Full API Reference

loginWithBankID(options: LoginWithBankIDOptions)

Starts Mobile BankID authentication and returns { auth, session }. Persist session to disk to skip QR next time; use auth.pollStatus() for QR frames and auth.verify() to block until done.

Classes

SwedbankClient

• constructor(authOrSession) – pass a MobileBankIDAuth instance or a persisted Session object
• profileList() – list available profiles for the authenticated user
• accountList(profileID?) – fetch engagement overview (transactionAccounts, savingsAccounts, cardAccounts, loans)
• accountTransactions(accountID?, transactionsPerPage?, page?) – single-page transaction preview (legacy)
• accountDetails(accountID?, transactionsPerPage?, page?) – alias of accountTransactions
• getFullTransactionHistory(accountID?) – traverse pagination and return all transactions
• transactionDetails(detailsTransactionID) – fetch additional info for a transaction
• portfolioList(profileID?) – list savings/investment holdings
• reminders() – fetch message reminders
• transferBaseInfo() – base info for payments (limits, defaults)
• transferRegisterPayment(amount, fromAccountId, recipientAccountId, fromAccountNote?, recipientAccountMessage?, transferDate?, periodicity?)
• transferListRegistered() / transferListConfirmed() – list pending/confirmed payments
• transferConfirmPayments() – confirm all registered transfers
• transferDeletePayment(transferId) – delete a payment
• quickBalanceAccounts(profileID?) – list accounts eligible for quick balance
• quickBalanceSubscription(accountQuickBalanceSubID) / quickBalance(subscriptionId) / quickBalanceUnsubscription(subscriptionId, profileID?)
• selectProfileIfNeeded(accountsResp) – helper to auto-select a profile when the API requests it
• terminate() – end the authentication session

MobileBankIDAuth

• initAuth() – start Mobile BankID (QR or same-device)
• pollStatus() – non-blocking status + animated QR payload
• verify() / verifyLoop() – block until authentication is complete
• getAutoStartToken() – deep-link token for same-device flows
• getImageChallengeData() – latest QR frame payload
• setSameDevice(sameDevice) – toggle between QR and same-device modes
• terminate() – logout

SecurityTokenAuth

Hardware token/OTP flow (legacy): getChallenge(), login(responseCode), isUseOneTimePassword().

UnAuth

Device registration without full login: login() registers the device; useful for unauthenticated endpoints.

Utilities

• AppData / AppDataCache – fetch and cache mobile app metadata
• HttpClient – Swedbank-aware fetch wrapper with cookie + header management
• Types: Session, SwedbankTransaction, LoginWithBankIDOptions, MobileBankIDAuthOptions, SecurityTokenAuthOptions, UnAuthOptions

Contributing

PRs are welcome! Please:

1. Run npm test to execute Vitest suites.
2. Include updates to TSDoc/README when changing public APIs.
3. Keep logs behind SWEDBANK_DEBUG to avoid noisy defaults.

License

MIT