API
Agora, Inc.
stock NASDAQ ADR

I think you vastly underestimate how difficult it is to develop and operate a public trading software. This is not like a music player where if something goes wrong you just create a new playlist. If something goes wrong in your project, you're looking at millions in damages and lawsuits.
Are you able to guarantee latencies in the low milliseconds/high microseconds? Real time data is important because stock prices change on a tick-by-tick basis. Are you able to guarantee uptimes of >99.9999%? Imagine what your customers' attorneys would do to you if your server crashed during high-activity events (like a market downturn). How do you ensure the safety of your customers' personal financial data? If something gets leaked here, it's not a matter of "someone saw a picture of my dog" but "all of your customers are now at risk of identity theft". Do you have a legal team to fight off international regulatory bodies? The SEC alone is a pain in the ass to deal with, but if you want to trade non-US markets, you potentially have dozens of agencies just like them up your ass, constantly. How much access are you willing to give the end user through your API? How do you plan to stay on top of exploits? Do you have a 24/7 on-standby cybersecurity department to ward off potential and actual threats?
These are just a couple of questions that I could think of off the top of my head. I'm not trying to be an ass here. But this is not a project that you vibecode on a weekend.

I am afraid the L2 data quality at brokers is as terrible as at interactive brokers… and blindly open accounts at brokers I don’t want to trade with and deposit some money, probably through complicated means to end up with shitty data or API isn’t a good solution. I prefer data vendors with decent APIs and reasonable data quality, if there are reasonably priced options for retail.

Yes, I could. I've developed with MT5, IBKR, Alpaca, Exante, Webull, CCXT, and Rithmic API. MT5 offered the best experience. IBKR didn't offer free real-time data. I would need a permissioned login.

Can you write it towards IBKR API?

TradeStation has an excellent API. I use it all the time from Python code. (It’s a REST API so could use from anything.) They even have good docs.

Hi everyone.
I need futures & equity data. Currently I'm using Tradestation, with 20$ per month I have access to pretty much everything I need.
The problem is that I had to code an indicator for the desktop platform in order to export data to csv... Because I work with Python.
Is there a data provider as cheap as that with a good Python API?
Thanks

You mean setting up API and webhooks, but how would you do that without seeing confidential backend and frontend code?

Hi there! For concerns specifically related to API, we’d recommend joining our dedicated [API group](https://t.me/KuCoin_API) where our team and community members focus on such topics. Thank you.

I’m building a **wrapper exchange on KuCoin**. Each user gets a unique deposit address, but all funds go to our **master account**.
**The issue:**
* KuCoin seems to have **no WebSocket for deposit notifications**.
* REST API (`GET /api/v1/deposits`) works, but returns **all deposits**, which is slow and not real-time.
**Problems:**
* Polling frequently can hit API limits.
* Delays make user crediting slower and reconciliation harder.
**Question:**
* Does KuCoin have any real-time deposit feed?
* How do you handle **multi-user deposit tracking efficiently** without a WebSocket?

Not exposing their API for free-tier users is their biggest weakness. They thought they could make money by reserving it for a premium tier, but they would be better off making their Python API accessible to everyone. This way, they wouldn't have to deal with issues like PineScript and other programming languages, as users would handle them themselves.
Not to mention, with a basic understanding of how socket connections work in Python, replicating their API would be fairly simple. Having API access doesn't mean you can suddenly engage in HFT, as SEBI regulations prohibit it and require retailers to route their programmatic orders through a broker (not directly to the exchange unless NSE membership fees are paid).

Hello.

I'm a dividend-based financial freelancer, and for the past few months I've been looking for ways to invest my time in something productive.
I created an app exclusively for iOS that allows you to track dividends and your portfolio on your phone. It's similar to the ones already available, but I've tried to add features and promise that if it receives good feedback, I'll continue working on it to bring more.
My app is [Dividends - Portfolio Tracker on App Store](https://apps.apple.com/es/app/dividends-portfolio-tracker/id6748914621) with a blue-orange logo.
For example, the latest addition I made is that premium users (the paid plans are affordable) can receive daily notifications on their phone with dividend payments from their companies.
The subscription plan is much more affordable than other apps, and I was forced to implement it because the API I query for company information is paid, so I need to cover the costs. Although, of course, the app also has a generous free plan with some ads.
I look forward to your feedback and, if you'd like, any features you'd like to integrate into future versions of the app.
Thank you.

For Solana DEX price history, try **DexPaprika** \- an on-chain/DEX-focused Public API from CoinPaprika. It gives **per-pool OHLCV** for all tracked liquidity pools, from **1m up to 24h**, for as far back as the pool has data. No API key.
Quick flow:
1. Find pools for a token `GET https://api.dexpaprika.com/networks/solana/tokens/<ADDRESS>/pools`
2. Pull candles (minute-level) for SOL/USDC`GET` [`https://api.dexpaprika.com/networks/solana/pools/Czfq3xZZDmsdGdUyrNLtRhGc47cXcZtLG4crryfu44zE/ohlcv?start=2025-09-09&interval=1m&limit=50`](https://api.dexpaprika.com/networks/solana/pools/Czfq3xZZDmsdGdUyrNLtRhGc47cXcZtLG4crryfu44zE/ohlcv?start=2025-09-09&interval=1m&limit=50)
Docs: [https://docs.dexpaprika.com](https://docs.dexpaprika.com)
Disclosure: I’m on the team.

Yeah, you really shouldn’t set slippage that high. A lot depends on the platform you’re copy-trading on. Running it purely by yourself just for one trader is expensive - you’d need to pay for multiple API providers (its 500+ usd monthly at very least), especially if you want to send fast, which is a key technical part of copy trading.
It also depends a lot on the trading style of the person you’re following - if they’re doing quick trades that last ten seconds on launches or migrations, then you need to have the fastest setup possible, meaning a solid platform and high priority fees for fastest copy. For slower trades that last hours or days, speed isn’t nearly as important, and slippage of about 10% is usually more than enough. Even for fast trades, I wouldn’t recommend setting slippage above 20% - the risk/reward change too much.
Obviously, it makes no sense to trade with something like 0.001 SOL when just the priority fee and anti-MEV settings alone can be 0.001 or more—you’d need 2x profit just to break even. So you should be trading with decent amounts after running tests.
Again, a lot depends on the platform’s functionality. You need stop-losses and take-profits, partial sales, etc. - all of that is essential in copy trading. Blindly following someone’s buys and sells with serious money won’t work, you also need strategies for scaling in and scaling out if you’re going to take it seriously.
And then there’s a whole separate layer with analyzing wallets themselves - some wallets are created just to lure copy-traders in and then suddenly rugpull or dump on their followers. There are a lot of hidden pitfalls when analyzing wallets too - it would take a long time to go into all the details…

I can't speak for E\*Trade. But I did take a look at Schwab and I don't see NAV related data available in either the API or Thinkorswim.
You can somewhat derive the premium/discount in real time of some ETFs by using the indicative NAV if it's available. Schwab does provide indicative NAV data for some ETFs. But afaik - it's not available for CEFs like GOF.
As for tracking it elsewhere - try tools like [etf.com](http://etf.com) and [etfdb.com](http://etfdb.com) \- they may have the tools you seek.

Comdirect ist relativ teuer, aber alles in allem gut & verlässlich in der Ausführung; solche Breakdowns im Peak wie bei TR oder SC gibts nicht. Es gibt einen Kundenservice der rund um die Uhr erreichbar ist - wobei ich zugeben muss, wenn man nachts um 24.00 anruft mus man manchmal länger warten.
Sie haben eine relativ aktiv Community, wobei da nur Hobbyuser rumhängen. Und sie haben eine vernünftige REST API mit der alles gekauft werden kann, was eine ISIN hat.
Insgesamt ein guter & verlässlicher Broker, aber nicht die günstigsten.

IQFeed is something I look into every year or so, and then decide against it for one reason or another. In this case: I haven't managed to figure out if they actually provide L2 on their CME Globex package or not.
Anyway, I've stumbled upon Rithmic. I've seen they have an API. But I'm really struggling to figure out how on earth to subscribe to them. It seems they only work through some brokers (I'm non-US and limited in broker selection - only brokers that have a branch that is regulated in an EU country are acceptable, which is mostly IBKR)?
The pricing you say isn't much of an issue, 100 USD + Exchange fee is fine. But I'll need to figure out how to subscribe to them...

Thanks for the namedrop.
We're about to open up core engineer (C++, Rust) and API engineer (Python) job postings at end of Sep.
Core: Direct venue integration, parsers, normalization, and performance optimization. CFE, LME, JPX, Nodal, Xetra, crypto, cash treasuries are on our venue shortlist, in no particular order.
API: Web app backend, ETL pipelines, reference and static data (e.g., corporate actions, fundamentals), symbology.
We do prefer candidates with institutional or high-growth startup experience.

# Today is Wednesday, the 17th of September
## Upcoming events for Wednesday, September 17th
- Stock splits:
- SQNS @ **1:10**
- TARGF @ **1:4**
- Expected earnings:
ARBK, BENF, BLSH, BNAI, BNC, BTCT, CBRL, CODI, DSWL, GIS, ILLR, IPHA, KFFB, LU, MANU, MOVE, MPU, NAAS, NAMM, NNDM, OP, PLUR, QSG, RMSG, SANG, USBC
- Ex-div:
AMDU, AVT, CHMG, HBAN, HIMY, HOOI, HRZN, MST, NXPI, OTGL, PLT, RAA, SMCC, UTMD
- Economic events and announcements:
- 20-Year Bond Auction (actual: 4.613%, previous: 4.876%)
- API Weekly Crude Oil Stock (actual: -3.420M, consensus: -1.600M, previous: 1.250M)
- Atlanta Fed GDPNow (actual: 3.4%, consensus: 3.1%, previous: 3.1%)
- Business Inventories (actual: 0.2%, consensus: 0.2%, previous: 0.2%)
- Capacity Utilization Rate (actual: 77.4%, consensus: 77.4%, previous: 77.4%)
- Core Retail Sales (actual: 0.7%, consensus: 0.4%, previous: 0.4%)
- Export Price Index (actual: 0.3%, consensus: -0.1%, previous: 0.3%)
- Export Price Index (actual: 3.4%, previous: 2.4%)
- Import Price Index (actual: 0.0%, previous: -0.2%)
- Import Price Index (actual: 0.3%, consensus: -0.2%, previous: 0.2%)
- Industrial Production (actual: 0.1%, consensus: -0.1%, previous: -0.4%)
- Industrial Production (actual: 0.87%, previous: 1.27%)
- Manufacturing Production (actual: 0.2%, consensus: -0.2%, previous: -0.1%)
- NAHB Housing Market Index (actual: 32, consensus: 33, previous: 32)
- Redbook (actual: 6.3%, previous: 6.6%)
- Retail Control (actual: 0.7%, consensus: 0.4%, previous: 0.5%)
- Retail Inventories Ex Auto (actual: 0.1%, consensus: -0.1%, previous: 0.1%)
- Retail Sales (actual: 0.6%, consensus: 0.2%, previous: 0.6%)
- Retail Sales (actual: 5.00%, previous: 4.09%)
- Retail Sales Ex Gas/Autos (actual: 0.7%, previous: 0.3%)
## Upcoming events for Thursday, September 18th
- Stock splits:
- ATHA @ **1:10**
- ECDA @ **1:40**
- Expected earnings:
AACT, ASTC, CMBM, CTRM, DRI, EM, FDS, FDX, GHG, GLBS, HTLM, IPW, LEN, LEN.B, LITS, LPTH, PRFX, RSSS, RZLT, SCHL, SCNI, YI
- Ex-div:
FDUS, ICMB, KLIC, QCRH, SWBI
- Economic events and announcements:
- Atlanta Fed GDPNow (consensus: 3.4%, previous: 3.4%)
- Building Permits (consensus: 1.370M, previous: 1.362M)
- Building Permits (previous: -2.2%)
- Crude Oil Imports (previous: 0.668M)
- Crude Oil Inventories (consensus: 1.400M, previous: 3.939M)
- Cushing Crude Oil Inventories (previous: -0.365M)
- Distillate Fuel Production (previous: -0.024M)
- EIA Refinery Crude Runs (previous: -0.051M)
- EIA Weekly Distillates Stocks (consensus: 1.100M, previous: 4.715M)
- EIA Weekly Refinery Utilization Rates (previous: 0.6%)
- FOMC Economic Projections
- FOMC Press Conference
- FOMC Statement
- Fed Interest Rate Decision (consensus: 4.25%, previous: 4.50%)
- Gasoline Inventories (consensus: -0.700M, previous: 1.458M)
- Gasoline Production (previous: -0.285M)
- Heating Oil Stockpiles (previous: 0.266M)
- Housing Starts (consensus: 1.370M, previous: 1.428M)
- Housing Starts (previous: 5.2%)
- Interest Rate Projection - 1st Yr (previous: 3.6%)
- Interest Rate Projection - 2nd Yr (previous: 3.4%)
- Interest Rate Projection - 3rd Yr (previous: 3.1%)
- Interest Rate Projection - Current (previous: 3.9%)
- Interest Rate Projection - Longer (previous: 3.0%)
- MBA 30-Year Mortgage Rate (previous: 6.49%)
- MBA Mortgage Applications (previous: 9.2%)
- MBA Purchase Index (previous: 169.1)
- Mortgage Market Index (previous: 297.7)
- Mortgage Refinance Index (previous: 1,012.4)
## Upcoming events for Friday, September 19th
- Stock splits:
- HZLIF @ **2:5**
- Expected earnings:
AMBI, GWAV, JKS, MNY, OPT
- Ex-div:
BSVN, CSGS, HCKT, HLNE, HOFT, LAMR, OFS, RBCAA, VIRC, WHF
- Economic events and announcements:
- 10-Year TIPS Auction (previous: 1.985%)
- 4-Week Bill Auction (previous: 4.060%)
- 8-Week Bill Auction (previous: 4.000%)
- Continuing Jobless Claims (consensus: 1,950K, previous: 1,939K)
- Fed's Balance Sheet (previous: 6,606B)
- Initial Jobless Claims (consensus: 241K, previous: 263K)
- Jobless Claims 4-Week Avg. (previous: 240.50K)
- Natural Gas Storage (consensus: 80B, previous: 71B)
- Overall Net Capital Flow (previous: 77.80B)
- Philadelphia Fed Manufacturing Index (consensus: 1.7, previous: -0.3)
- Philly Fed Business Conditions (previous: 25.0)
- Philly Fed CAPEX Index (previous: 38.40)
- Philly Fed Employment (previous: 5.9)
- Philly Fed New Orders (previous: -1.9)
- Philly Fed Prices Paid (previous: 66.80)
- Reserve Balances with Federal Reserve Banks (previous: 3.151T)
- TIC Net Long-Term Transactions (previous: 150.8B)
- TIC Net Long-Term Transactions including Swaps (consensus: 97.20B, previous: 150.80B)
- US Foreign Buying, T-bonds (previous: -5.00B)
- US Leading Index (consensus: -0.2%, previous: -0.1%)
## Upcoming events for Saturday, September 20th
- Economic events and announcements:
- CFTC Aluminium speculative net positions (previous: 1.2K)
- CFTC Copper speculative net positions (previous: 27.2K)
- CFTC Corn speculative net positions (previous: -54.2K)
- CFTC Crude Oil speculative net positions (previous: 81.8K)
- CFTC Gold speculative net positions (previous: 261.7K)
- CFTC Nasdaq 100 speculative net positions (previous: 25.5K)
- CFTC Natural Gas speculative net positions (previous: -94.5K)
- CFTC S&P 500 speculative net positions (previous: -173.7K)
- CFTC Silver speculative net positions (previous: 53.9K)
- CFTC Soybeans speculative net positions (previous: 8.3K)
- CFTC Wheat speculative net positions (previous: -82.1K)
- U.S. Baker Hughes Oil Rig Count (previous: 416)
- U.S. Baker Hughes Total Rig Count (previous: 539)
^^^^2025-09-17

Anyone notices Yahoo Finance price data API is screwed up?

Rithmic API. It is really good, but there are cheaper ones out there, for eg CTS FIX or .net API.
For Rithmic the data is whatever the exchange charges + 100 USD/month for the API.
CQG also has an API but not sure about the cost. IQ feed is also around 50 USD per month as far as I can remember.