YNAB

Budgeting & Planning

FinanceAuth: OAuthHTTPS: YesCORS: yesStatus: alive

Last verified: April 1, 2026

Getting Started

This API uses OAuth for authentication, which is more involved than a simple API key but provides better security, especially when accessing user data.

Register your app — Create an application on the API provider's developer portal to get a Client ID and Client Secret.
Implement the OAuth flow — Redirect users to the provider's authorization page, where they grant permission to your app.
Exchange the code — After authorization, you'll receive a code that you exchange for an access token.
Use the token — Include the access token in the Authorization header of your API requests.

OAuth is commonly used by APIs that access personal data (like social media accounts). Many libraries exist to simplify the OAuth flow in every major programming language.

CORS Support

This API supports CORS (Cross-Origin Resource Sharing), meaning you can call it directly from browser-based JavaScript applications without running into cross-origin errors.

Quick Example

// Using cURL
curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://api.youneedabudget.com/

// Using JavaScript fetch()
const response = await fetch(apiUrl, {
  headers: { 'Authorization': 'Bearer YOUR_ACCESS_TOKEN' }
});
const data = await response.json();

About YNAB

YNAB is a free API in the Finance category. It uses OAuth for authentication, which provides secure access to user-specific data. This API supports HTTPS for secure connections and supports CORS, making it suitable for direct browser-based requests.

What You Can Build With YNAB

YNAB fits naturally into projects that touch the Finance space. Here are a few directions developers commonly take when working with APIs in this category — any of them could be a fit depending on the specific endpoints YNAB exposes:

Stock price trackers — pull data from YNAB, transform it into a UI-friendly shape, and surface it to users in a dashboard, mobile app, or browser extension.
Portfolio management dashboards — pull data from YNAB, transform it into a UI-friendly shape, and surface it to users in a dashboard, mobile app, or browser extension.
Financial news aggregators — pull data from YNAB, transform it into a UI-friendly shape, and surface it to users in a dashboard, mobile app, or browser extension.
Banking and payment integrations — pull data from YNAB, transform it into a UI-friendly shape, and surface it to users in a dashboard, mobile app, or browser extension.

If a specific use case isn't listed, scroll back to the code examples above and adapt the request shape to match the endpoint you need. Most Finance APIs follow similar request/response patterns, so the snippet that works for one endpoint usually works for the rest with small tweaks.

Integrating YNAB Step by Step

1. Skim the documentation first. Open the link above and look for two things: the base URL pattern and a list of available endpoints. Knowing both up front saves you from guessing parameter names or formats. Most providers also publish example responses next to each endpoint — copy one into your editor as a reference for the JSON shape your code will be parsing.

2. Register your application for OAuth. YNAB uses OAuth, so before you can call any endpoint you'll need to register a client application with the provider. That gives you a Client ID and Client Secret. Implementing the OAuth flow yourself is doable but tedious — most languages have a well-supported library that handles the redirect dance and token refresh for you. Use it.

3. Make a request from the command line. Before wiring an API into your application, send a single request with curl or your HTTP client of choice. Confirm that the response shape matches what the docs promised. If it doesn't, your application code would have hit the same surprise — better to find out now while you only have one terminal window to debug.

4. Wire it into your code. Once a manual request works, copy that request into your application as a function. Add error handling: APIs return 4xx and 5xx codes for client and server errors respectively, and your code needs to behave reasonably when one comes back. Our error-handling guide covers the patterns that make this less painful.

5. Calling from the browser is fine. YNAB supports CORS, so a frontend-only project can hit it directly with fetch(). Watch out for two gotchas: never embed an API key in client-side code (anyone can read it from devtools), and remember that browser requests count against the same rate limit as server requests.

Common Issues and How to Fix Them

OAuth redirect mismatch: the redirect URI you registered with YNAB must exactly match the one your app sends, including the protocol and trailing slash. Even http:// vs https:// will fail.
Token expired: OAuth access tokens are short-lived. Use the refresh token to get a new one before the old one expires, or wrap your API calls in a layer that retries after refreshing on a 401.
"CORS policy" error in the browser: YNAB is listed as supporting CORS, but headers can change. If you hit a CORS error, double-check that you're sending only allowed headers (no custom X- headers unless documented) and that you're not setting credentials: 'include' unnecessarily.
Rate limiting (429 Too Many Requests): if you start seeing 429s, you've crossed the API's per-minute or per-day quota. Add exponential backoff with retries, cache responses where possible, and consider whether a paid tier or alternative API is warranted. Our rate limit guide covers this in depth.
Inconsistent response shape: if YNAB's response sometimes includes a field and sometimes doesn't, that's normal — APIs often omit null values. Defensive code that checks for property existence before reading it survives schema changes far better than code that assumes everything is always present.

YNAB in the Finance Ecosystem

Finance APIs deliver stock prices, market data, banking information, and financial analytics. Build trading dashboards, portfolio trackers, or fintech applications with real-time financial data.

YNAB is one of dozens of free Finance APIs we've catalogued. Some are nearly interchangeable; others have distinct strengths and weaknesses that only become clear when you read their docs side-by-side. If YNAB doesn't quite fit your project, the Finance category page lists every alternative we know about, with auth and CORS columns so you can compare at a glance.

When evaluating Finance APIs, the criteria that matter most are typically: rate limits on the free tier, freshness of the underlying data, regional coverage (does it work for your users' geography?), and how active the provider's maintenance schedule is. APIs that haven't been updated in years tend to drift out of sync with the underlying data sources, even if they technically still respond.

Frequently Asked Questions

What financial data can I access through YNAB?

YNAB is a finance API that may provide data such as stock prices, exchange rates, market indices, cryptocurrency values, or economic indicators. The specific data depends on the API's focus area. Review the endpoint documentation to see which financial instruments and data points are covered.

Does YNAB provide real-time market data?

Real-time data availability varies across finance APIs. Some provide live streaming prices, others offer data with a 15-minute delay (common for free tiers), and some focus on end-of-day summaries. Check YNAB's documentation to confirm the data latency and whether real-time feeds are available on the free plan.

Can I use YNAB to track cryptocurrency prices?

Whether YNAB covers cryptocurrency depends on its specific focus. Some finance APIs specialize in crypto, others cover traditional markets, and some handle both. Visit the API documentation to see if crypto endpoints are available. You can also browse our Finance APIs for other options that may cover digital assets.

Is YNAB free to use?

Yes, YNAB is listed as a free public API. You will need to register an application to get OAuth credentials, but access is free. Some APIs have rate limits on their free tier, so check the official documentation for current limits.

Is YNAB still working in 2026?

Yes! According to our most recent health check (YNAB's last ping: 2026-04-01 13:40:06), this API is responding normally. We periodically verify all listed APIs to ensure they are still online and functioning.