Prompt
What should I use for market data API?
Latest observation
It depends on what markets you need, your latency needs, and your budget. Here are the best choices by use case:
If you want a general-purpose, easy API
- Polygon.io — Great all-around choice for US stocks, options, forex, and crypto. Good docs, solid reliability.
- Twelve Data — Good broad coverage, easy to use, often cheaper for basic use.
If you need institutional-grade / global coverage
- Refinitiv / LSEG
- Bloomberg
- FactSet
- ICE Data These are powerful but usually expensive and more complex.
If you want free or low-cost
- Alpha Vantage — Easy to start with, but rate limits are tight and data quality/coverage may be limited.
- Stooq — Free historical data, not ideal for real-time.
- IEX Cloud — Good for US equities, but coverage depends on plan and product changes over time.
If you need crypto data
- CoinGecko API — Great for broad crypto market data, easy and free-ish.
- Exchange APIs like Binance, Coinbase, Kraken — Best for exchange-specific real-time data.
If you need real-time trading data
Look for:
- WebSocket support
- Tick-level or quote-level data
- Low latency SLA
- Redistribution rights if you plan to show data to users
Quick recommendation
- Startups / apps / prototypes: Polygon.io or Twelve Data
- Free/experimental: Alpha Vantage or CoinGecko
- Professional/enterprise: Bloomberg, Refinitiv, FactSet
If you tell me:
- asset class (stocks/options/crypto/forex),
- real-time vs delayed,
- country/market,
- budget,
I can recommend the best specific API.
Observation history
How did Obsurfable measure this prompt?
Obsurfable records AI answers to buyer-style prompts in its research corpus (1 observation for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
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