Ask HN: Whose API is the best source of stock market data?

1 fincrime-target 3 6/19/2025, 5:29:21 PM

No doubt some HN users have written programs to analyze stock market prices, screen companies, etc.

Presumably most data sources (to find historical prices, stats, etc for a ticker) for this are paid.

Let's say (because it's true) that I want to write an app to screen stocks; who would you recommend I use as a data source?

Comments (3)

jasonthorsness · 3h ago

I used polygon.io for a side project and found it pretty good. They have bulk S3-compatible API and a web socket API for real-time updates.

fincrime-target · 3h ago

Thanks. The site design inspires more confidence than 'gurufocus.com'; on the other hand, it seems not to support exchanges outside America. I have to think about how important that is to me.

constantinum · 3h ago

https://www.gurufocus.com

UK Global Talent Visa (relocateme.substack.com)

Show HN: Would You Rent a Robot for Your Home?

Using a space elevator to get water off Ceres (phys.org)

Ghostty is a fast, cross-platform terminal emulator (github.com)

Over 16B records leaked in "unimaginable" major data breach (techradar.com)

Kyutai STT – A speech-to-text optimized for real-time usage (kyutai.org)

Biomarker-driven nutrition: going beyond generic diet advice (empirical.health)

The New Church of Finance (2012) (deseret.com)

DNS at the edge: performance, security, and strategic advantage (axonshield.com)

David Lynch explains Transcendental Meditation [video] (2015) (youtube.com)

State of the Art with AI: Stay on Top of Research with Personalized Emails (stateoftheartwithai.com)

Show HN: LiteChat: A t3.chat cloneathon competitor [video] (youtube.com)

Akamai Web Application Firewall – How It Works (axonshield.com)

Data Science Weekly – Issue 604 (datascienceweekly.substack.com)

The day Steve Jobs dissed me in a keynote (2010) (sive.rs)

Deep Dive into DNS: Super Smart Address Book (axonshield.com)

Humans Need Not Apply (2015) [video] (youtube.com)

Seeking Jira Survivors (atono.io)

Show HN: Provide a short description, get animated character with deep backstory (ki-storygen.com)

Show HN: Raindrop Deep Search: Deep Research for Your Production AI Data (raindrop.ai)

Show HN: I vibe coded a Gnutella P2P client to learn how it works (github.com)

Show HN: Voice AI Practice Scenarios for PM Interviews (toughtongueai.com)

How to Do Open Source and Right to Repair Advocacy Successfully (medium.com)

Cognitive Assessments for Autism: The Best Tools and Methods (neurolaunch.com)

Intelligence on Tap: Redefining the Human Role (medium.com)

Washington Startup Named Finalist for 2025 World of Wipes Innovation Award (mycookwarecare.com)

BF16 and Image Generation Models (engineering.drawthings.ai)

'A bundle of microscopic tornadoes' may have given the universe its structure (livescience.com)

Ask HN: What are the most popular uses of LLMs (other than code/image gen)?

The Less Humble Programmer (2023) (digitalhumanities.org)

Replit just changed their Pricing...

The 16B-record data breach that no one's ever heard of (cybernews.com)

Easy to use, protected and tracked artifact delivery (kagehq.com)

With AI, we all feel like "10x developers"

Another win for EU users? Ads in WhatsApp won't be coming this year (neowin.net)

Elon Musk: Digital Superintelligence, Multiplanetary Life, Being Useful [video] (youtube.com)

Denisovan mitochondrial DNA from dental of the >146k-year-old Harbin cranium (cell.com)

Trying Out Wayland in 2025 (tyil.nl)

Show HN: Clarabase – Managed REST APIs from a Single JSON Schema in Seconds

Indicators of Global Climate Change 2024: annual update of key indicators (igcc.earth)

Change your Google password now, 16B login records were recently exposed (androidpolice.com)

Cardiovascular risk associated with the use of cannabis and cannabinoid (heart.bmj.com)

Show HN: I built an app to explain why chess moves are good or bad (app.chesscoach.dev)

Temperatures pass 32C as first UK area enters heatwave (bbc.com)

Estrogen: A Trip Report (smoothbrains.net)

Hydronuclear Testing (computer.rip)

FounderFlow – Build Smarter, Faster With an AI Copilot That Guides Every Step (founderflow.crd.co)

Ask HN: What is the best way to generate a ton of money as a dev?

CasualOS: Web-based tools for interactive experiences (docs.casualos.com)

Eliza: The doll that teaches girls to code (elizadolls.com)

Ask HN: Whose API is the best source of stock market data?

Comments (3)