Tagging 8-K disclosures with AI: corporate events, labelled by what actually happened
A SEC 8-K API that labels what actually happened. Query filings by event type (CEO departures, cybersecurity incidents, M&A), with source-cited tags.
rian
Posts in update
More posts in update
Case Study: Earnings Watcher Models Earnings Volatility for Retail Options Traders with Massive
In this post, we'll walk through how Earnings Watcher built its analytics layer on Massive's options chains and snapshots, why Fair Market Value anchors its scanner, and how the same API pattern extended from options into post-earnings drift analysis on the underlying equity.
alexnovotny
Build a LULD Price Band Monitor with Massive's WebSocket API
Massive's LULD WebSocket channel streams Limit Up/Limit Down price band updates, halts, and resumptions for every NMS stock in real time.
editor
Futures Data Has Arrived
Massive’s Futures APIs are now generally available, providing real-time and historical market data for top U.S. futures (ES, GC, CL) from CME, CBOT, COMEX, and NYMEX, accessible via REST API, Websocket, and flat files.
editor
Build a NYSE Order Imbalance Tracker with Massive's WebSocket API
Massive's NOI WebSocket channel streams NYSE Net Order Imbalance data in real time, including imbalance quantity, paired shares, and the indicative clearing price.
cole
Build a Real-Time Dark Pool Scanner with Massive's Websocket API
In this tutorial, you'll build a terminal-based dark pool scanner in Python and under 150 lines of code that streams real-time stock trades from Massive's API.
cole
Insider and Institutional Ownership data via Massive’s APIs (forms 3, 4, and 13F)
Massive now exposes three insider and institutional disclosure datasets in our REST API: form 3, form 4, and form 13F.
alexnovotny
What a decade of credit card data says about Amazon's busiest days
Massive has launched two new alternative data endpoints surrounding European consumer spending data.
rian
Query Market, Fundamental, and Alternative Data across financial markets with the updated Massive MCP server
The Massive MCP server rewrite collapses everything into 4 composable tools with 11 parameters, cutting context overhead by over 90%. The server also ships with built-in financial functions: Black-Scholes Greeks, Sharpe/Sortino ratios, & moving averages.
alexnovotny
Announcing the Massive Labor Market API
Key Federal Reserve labor market indicators: unemployment rate, labor force participation, average hourly earnings, and job openings are now accessible through a simple, unified API.
cole
SEC Filings & Disclosures: AI-Ready Data, Structured Risk Factors, and Filing Search
Massive has five new endpoints (currently in beta, open to all account types) for working with SEC filings programmatically.
rian
Massive Now Returns Fractional Share Precision: What Changed and Why It Matters
On February 23, 2026, FINRA's SIPs began reporting fractional share quantities with up to six decimal places. Before this, trades were rounded or truncated to whole numbers. Massive's APIs now expose the new decimal values across WebSocket, REST, and flat file delivery.
alexnovotny
Release Notes - September 2023
We've introduced historical second aggregates based on user feedback, and enhanced our system monitoring to ensure you're always updated in real time.
editor
Release Notes - July 2023
We've been hard at work introducing new features such as our Universal Snapshot API, a Massive plugin for ChatGPT, and Indices data. We've also made a number of improvements to our services and have some exciting case studies and tutorials to share with you.
editor
Release Notes - March 2023
What's new at Massive? Indices data, CSV support and improved company financials are just a few of the things we've added to the platform over the last few weeks. Read more about our recent feature launches and improvements.
katie
OTC Stocks Have Arrived
We've just rolled out OTC data to every stocks plan on the Massive platform. No additional subscription is needed, just query any OTC ticker from our REST or WebSocket APIs and get data for all US OTC venues.
katie
Announcing WebSocket Docs V2
Updated User Interface We've updated the user interface on our WebSocket documentation according to our latest design patterns. An updated wscat example makes connecting to streaming data from stocks, forex, and crypto as easy as 1,2,3. New inputs make it easier to define parameters, and the updated scrolling behavior ensures everything you need is always within view. Better Content & Examples Channel, parameter, and response attribute descriptions now have
quintonpike
Announcing Docs V2
We've updated the user interface and navigation on our API documentation according to our latest design patterns.
peter
Production Infrastructure Upgrades: Sunday, September 20, 2020
We will be upgrading our production infrastructure Sunday, September 20, 2020 @ 2:00 PM EST.
peter
Server Upgrades
We've recently added a ton (literally) of additional hardware including entirely new racks, PDUs, and SSDs.
peter
Client Library Updates
Hi everyone! Just wanted to give a brief update regarding the status of the Client Libraries we posted about a few months ago. Since we reached out to our community, several talented developers have stepped up and contributed quality SDKs to our Github . These should help the process of connecting to our RESTful & Websocket APIs [https://massive.com/d
jack
Planned Maintenance: Sat Feb 22 @ 10:00 AM EST
We plan on upgrading production Kubernetes Saturday, February 22 at 10:00 AM EST.
peter
Action Required: V1 Aggregates, Historic Trades, and Historic Quotes APIs will be Deprecated on 01/01/2020
Our V1 Aggregates, Historic Trades, and Historic Quotes APIs will be deprecated by the end of this year in favor of V2 Aggregates, Historic Trades, and Historic Quotes APIs beginning 01/01/2020. Customers can continue to use the V1 endpoints until 12/31/2019. We will also continue to offer support for the V1 endpoints until 12/31/2019. Our V2 APIs are built from the ground up and will give customers more flexibly and better service moving forward. We encourage users to switch to using the V2 e
peter
Announcing V2 Tick API
We've made numerous improvements to our Tick API in the V2 update.
jack
Action Required: NATS Service will be Deprecated on 01/01/2020
Our NATS service will be deprecated by the end of this year in favor of WebSockets beginning 01/01/2020.
peter
Aggregate Stream Optimizations
We have changed both channels to only broadcast updates on the tickers which have actually had trades in that timespan. Which means the average is ~1000 ticks/second instead of ~8000. This allows better throughput, and less processing messages of tickers that have not changed.
quintonpike
Schema Updates
We are updating the schemas of the TRADES and QUOTES real-time data feeds. All other real-time feeds, and APIs will stay as they are currently. We are changing the schema of the trades/quotes for smaller and only unique per tick data attributes. This will make the messages smaller, enabling less bandwidth and less processing per tick for encoding/decoding the JSON. New schema ticks will start streaming on market open, Monday, January 29th. Current Trade Schema: { sym: 'MSFT', // Symbol sym
quintonpike