Massive

Financial market data API — real-time and historical data for stocks, options, indices, currencies, futures

massive.com

Verified API available Free tier ~26k monthly visits

Quick facts
What is it	Financial market data API — real-time and historical data for stocks, options, indices, currencies, futures
Pricing	Freemium — from $29/mo
Free tier	Yes
Platform	Web Application
API	Yes
Best for	building trading applications, displaying real-time market data on websites
Domain registered	1995

Data updated Aug. 1, 2026

What does Massive do?

Massive is a financial market data platform that gives developers and businesses access to real-time and historical data for stocks, options, indices, currencies, and futures. It provides this data through REST APIs, WebSockets, flat files, and SQL queries, so you can choose the method that fits your application. The platform covers over 32,000 stock tickers, 1.67 million option contracts, and thousands of indices and forex pairs, with data going back as far as 2003 for stocks.

Massive differentiates itself by being co-located directly in exchange datacenters with fiber cross-connects, which means data arrives with under 20ms latency. The data is cleaned, normalized, and free of survivorship bias — a common problem in financial datasets. The API is designed for developers: responses come in standardized JSON or CSV, and official client libraries are available for Python, JavaScript, Go, and Java. The documentation includes tutorials, example projects, and a quickstart guide.

This platform is best suited for financial app developers, fintech startups, robo-advisors, and researchers who need reliable, institutional-quality market data without negotiating with multiple data vendors. Common use cases include building trading interfaces, powering investment analysis tools, and displaying live stock prices on consumer apps. Massive keeps pricing simple and transparent — no per-query fees or hidden costs.

Non-AI Finance — Other

#api#developer tools#financial data#forex#futures#historical data#market-data-api#options#real-time data#stocks

Key features

What makes it stand out

Standardized JSON and CSV output for easy integration

Client libraries in Python, JavaScript, Go, Java to simplify development

Tutorials and examples to help you get started quickly

Access data via REST API, WebSockets, flat files, or SQL query

Institutional-grade data direct from major exchanges with <20ms latency

Who is Massive for?

Who benefits most from this tool

building trading applications

displaying real-time market data on websites

conducting financial research and analysis

Pricing

Free tier available — start without a credit card

Stocks Basic

Free

5 API calls per minute
2 historical data years
All US Stocks Tickers
5 API Calls / Minute
2 Years Historical Data
100% Market Coverage
End of Day Data
Reference Data
Corporate Actions
Technical Indicators
Minute Aggregates

Stocks Starter

$29.0/month

Everything in Stocks Basic, plus:

5 historical data years
Unlimited API Calls
5 Years Historical Data
15-minute Delayed Data
Unlimited File Downloads
WebSockets
Snapshot
Second Aggregates

Stocks Developer

$79.0/month

Everything in Stocks Starter, plus:

10 historical data years
10 Years Historical Data
Trades

Stocks Advanced

$199.0/month

Everything in Stocks Developer, plus:

20 historical data years
20+ Years Historical Data
Real-time Data
Quotes
Financials & Ratios

Financials & Ratios

$29.0/month

Company financials
Key ratios

NYSE Order Imbalances

$49.0/month

Auction data
Real-time order imbalances

Trust & presence

Search presence Top 100k site

Domain Domain registered 1995

Alternatives in Non-AI Finance

Msci Non-AI Finance

Financial analytics and index provider for investment decision-making

claude Top 100k site

Earnings Report Non-AI Finance

Track real-time earnings reports, calls, transcripts, and SEC filings for public companies in one workspace.

Similar tools

Finalle Investing

API for real-time AI-powered financial news and market insights — integrate stock updates, analyst ratings, and events into your app.

SimFin Investing

Stock market analysis platform — screen 5,000+ stocks, backtest strategies, and download financial data via API

Finimpulse Investing

Financial data API and dashboard for stocks, ETFs, and funds — access prices, fundamentals, and history via REST or AI search

make · n8n

finlight.me Investing

Real-time financial news API with AI sentiment analysis — access structured news data via REST, WebSocket, or webhooks

n8n

Parsewise Data Mining

API that processes multiple documents at once, extracts structured data, and links information across files.

Fiscal.ai Investing

AI-powered stock research platform providing global financial data, analytics, and summaries for investors.

claude

Factset Investing

Financial data platform with portfolio analytics and AI insights for investment professionals.