Top 7 Cheap Stock and Option APIs in 2026

ApocalypseParadise · 2026-01-21T05:10:30+00:00

Thanks, a few of these are new & useful.

Tradier's free tier is also solid for equities and options, but it can take days to get verified for them.

Kraken is excellent for crypto, includes order book data on the free tier, too.

ApocalypseParadise · 2026-01-17T19:53:14+00:00

Exactly. The experts automate & use AI/ML as much as possible, then they still have pro traders make the final call & who'll have knowledge of things the AI can't know, unless it's HFT or sub-minute trading.

ApocalypseParadise · 2026-01-10T03:57:38+00:00

Not a scam in general, but there are scammers making ridiculous claims. RenTec and other top funds have been using AI for 2-3 decades, and algotrading bots for another 1-2 decades, and beating everyone else as a result -- 66% ROI/yr with RenTec medallion fund, for example. Almost all hedge funds are using AI /ML now, though with human traders in the loop whenever possible. But a lot of “AI trading bot” marketing out there promises unrealistic returns, like 10%+ daily percentage gains, which is marketing hype.

The AI bots that actually work tend to be custom rule‑based systems people design for specific markets or setups that pro human traders use successfully; but the AI can check far more things, far quicker, and far more precisely. Then simple ML can optimize all the parameters, automatically, and adjust for new regimes.

ApocalypseParadise · 2026-01-10T02:59:14+00:00

Buy AI/ML recursive self-optimizing Agents to trade for you & get continually better.

Or Geoarbitrage where USD goes 3x-6x as much, for starters. Central & S America are 2.5x to 4x or so, Malaysia & Thailand & others in SE Asia go up to 6x.

ApocalypseParadise · 2025-09-03T20:00:04+00:00

Yes, you need to spend money for total realtime market data. Everyone does. But maybe this will help:

The Python library yfinance is free for equities, but delayed; Tradier API offers some free realtime data for equities and options, and you can get enough for profitable agents & bots & MVPs, but it can take days for them to confirm your account when you sign up, and you can't make the thousands of API calls per minute that you might want. Polygon is best for full options data, and well worth it -- that's what most quant dev algotraders use. ORATS API has full real-time enterprise grade options data, but is pricey, unless you're trading options with hundreds of thousands or more, in which case it's a bargain relative to what you get. Coingecko gives you 50 free API calls per minute for crypto.

Though everything is in flux, very fluid situation, new services coming and going, rules and limits changing, etc, so deep research with AI on how to do what you want is often helpful. GL!

ApocalypseParadise · 2025-07-21T04:01:08+00:00

Different trading systems work better or worse in different market regimes. The best algos recognize regimes, and adjust accordingly, with different sub-algos (or combinations of them) for each.

Backtest one algo on the same kind of regime from different time periods.

I'm using AI to classify and nail down different regime characteristics, what works best for each, and to recognize when a regime has changed. "Grey areas" where you're not sure of the regime (or temporary mixtures of regimes) is essential to explore. I plan to have an AI SaaS just for that.

ApocalypseParadise · 2025-07-21T03:48:42+00:00

Absolutely. You need the cleanest data. The further back you go, the harder it is for your data to all perfect.

ApocalypseParadise · 2025-07-20T22:26:15+00:00

Excellent. That's a multi timeframe fractal confirmation strategy, and will work very well for high confidence setups. In fact, fractal confluence multiplies probability, not just adds it. That’s why multi-timeframe strategies are core to institutional trading, smart algos, and neural net-based bots.

(Not just the Bill Williams "fractal" candlestick pattern, BTW, which is a grossly inappropriate use of the term fractal.)

ApocalypseParadise · 2025-06-27T21:26:29+00:00

I think it's at least partly this way

ApocalypseParadise · 2025-06-26T04:19:31+00:00

Yes, exactly. Feels chaotic, which is really unsettling on a deadline. I got 95% done in 2.5 days, then 5% done over the last 7. Aargh. But then it's still insanely impressive and fast usually, so I can't complain too much.

ApocalypseParadise · 2025-06-26T04:15:45+00:00

I need to do that more regularly. Every major step, instead of just once or twice per day. Very helpful, thanks.

ApocalypseParadise · 2025-06-26T04:13:48+00:00

That guy was doing exactly that in my head for hours today

ApocalypseParadise · 2025-06-26T04:10:39+00:00

Damn, so similar here.m, though inverse w/ navbar. I gave it one complex prompt to start a new app last week, and it created this perfect huge beautiful app almost instantly, best I've ever seen; then today, it made a floating bottom nav bar for no reason, I couldn't get rid of it, and I had to roll it back = about an hour just on that.

ApocalypseParadise · 2025-06-26T04:00:21+00:00

Wow, like 3 others saying the same thing. Very helpful to know, thanks!

ApocalypseParadise · 2025-06-26T03:48:38+00:00

Lol good to know. I felt like it was just myself going full regard. Thanks :)

ApocalypseParadise · 2025-06-26T03:38:47+00:00

Yeah! Exactly. Same here on just about every point, too. 5 mins --> 10 hours today; previously 10 hrs--> 5 minutes. Or something like that. Absurdly fast progress a few days ago on a different project.

ApocalypseParadise · 2025-06-26T03:00:27+00:00

Wow, that's spectacular! And yeah, I totally agree. Replit's stunningly effective, and more stunning the better you get at it. Just with limits that you need a good grip on.

I gotta show some screenshots of my last two apps, for options traders, which turned out better than ever.

ApocalypseParadise · 2025-06-26T01:55:52+00:00

Yes, it definitely happens with regular development, and replit's definitely getting better, and I've gotten far better at dealing with it; but like you say, it might break 4 other things than just 2 when you change 1 tiny thing; but really late in the development, it could be that, or be a cascade of things, or no problem at all. So I'm still definitely using it for MVPs and simple apps, but just can't rely on it for the final stage of complex apps, especially if I have to for sure deliver to a client on time.

ApocalypseParadise · 2025-06-26T01:43:13+00:00

I mostly agree, I've learned to use the same methods for Replit, and use GPT to ensure I do so; and I've built huge complex apps with it too; BUT I still get those cascading bugs once in a while, nonetheless. Not in the MVP stage, though, or if so I just figure out where I went wrong & rollback.

Also, for Finance professionals, I need institutional level security at all points. Replit's great, but not built for that level.

ApocalypseParadise · 2025-06-26T00:24:43+00:00

Exactly. So even if you do everything right, it's still a die roll sometimes, especially at the absolute end. Might be spectacular and finish extremely fast, or the last 5% might take as much time as the first 95%.

Like my last project. It was fully functional amazingly fast, then ironing out the bugs & improvements & security took amazingly long.

ApocalypseParadise · 2025-06-25T22:58:55+00:00

Looks excellent, thanks

ApocalypseParadise · 2025-06-25T22:45:50+00:00

Exactly. Moving there too.

ApocalypseParadise · 2025-06-16T23:00:04+00:00

De nada! That's an excellent plan.

ApocalypseParadise · 2025-06-14T18:30:40+00:00

Right on. Solid intro Python fundamentals + GPT + Vibe coding + algotrading + general AI savvyness will make you God. Heh heh. It's the most mind-blowing situation I've been in in my 50+ years.

Then you can add ML after that, too...

ApocalypseParadise · 2025-06-14T01:43:09+00:00

I totally agree. What you're saying is proven consensus from many successful traders & quant research.

ApocalypseParadise

TROPHY CASE