Financial Data APIs

FinFeedAPI gives you access to prediction markets data, stocks, real-time FX, and structured SEC filings - all through one user-friendly API. Simple pricing. Fast integration. No complexity.
Get API KeyRead Docs
background

Discover our APIs

background

Stock API

T+1 stock market data delivered through a simple, developer-friendly REST API. Covers IEX, Euronext, and 40+ global stock exchanges.
Learn More
background

Currencies API

Real-time currency data from both crypto markets and traditional FX. Delivered through REST and WebSocket.
Learn More
background

SEC API

Structured SEC filings (10-K, 10-Q, 8-K and more) delivered ready to use. A simple REST API that removes all the parsing work.
Learn More
background

Flat Files S3 API

Direct S3 access to normalized stock market data stored as flat files. Simple to integrate. No unnecessary layers.
Learn More
background

Prediction Markets API

Prediction market data in one place — latest prices, historical OHLCV, and full order books. Available for Polymarket, Kalshi, Myriad and Manifold. Delivered through a simple REST API.
Learn More

Resources to start work

background

Documentation

background

Tutorials

background

Glossary

background

SDK

background

Status page

Why choose FinFeedAPI?

FinFeedAPI is built for teams who need reliable financial data without messy pipelines or vendor patchwork. It’s one developer-friendly API for stocks, FX + crypto rates, SEC filings, and prediction markets, plus bulk delivery when you need it. All in one place.

background
Proven infrastructure
Created by the team behind CoinAPI. Built on infrastructure that’s designed for high-volume usage and production workloads, not hobby projects.
background
One integration, many products
You use one approach across different datasets and product lines, instead of stitching together multiple vendors and formats.
background
Clean, standardized, normalized data
Data is delivered in a consistent structure, so you spend less time fixing formats, mapping fields, or cleaning outputs.
background
AI-ready with MCP support
FinFeedAPI can be used directly inside LLM workflows and AI agents through Model Context Protocol, with minimal setup.
background
Different ways to connect
Choose REST, WebSocket, JSON-RPC, or S3 flat files depending on your system and how you consume data.
background
Predictable developer experience
Stable endpoints, clear docs, and consistent patterns across APIs make integrations easier to build and maintain over time.

Use cases

Use case: Trading platforms

Trading platforms need comprehensive reference data beyond price feeds, but developers struggle with fragmented sources and complex APIs, forcing them to either integrate costly enterprise solutions or build custom infrastructure from scratch.

Learn how we solved that
background

Recent Articles

background
Prediction Markets API

Election Forecasting vs Prediction Markets

Polls track voter intent, prediction markets track expectations - and the gap between them is often the real signal.
background
Prediction Markets API

Prediction Markets as Collective Intelligence Systems

Prediction markets turn crowd disagreement into live probability signals, working as collective intelligence systems - not betting platforms.
background
Prediction Markets API

Are Prediction Markets Accurate? A Look at Forecast Errors

Prediction markets are judged by forecast error, not by being right or wrong because how close the probability was matters more than the final outcome.
background
Prediction Markets API

From Yes Price to Probability: How Odds Are Formed

Yes price is a tradable probability shaped by liquidity, spread, and order flow, not just belief.
background
Prediction Markets API

Why Crowds Sometimes Get It Wrong

Prediction markets get it wrong when herd behavior, anchoring, and low liquidity turn clean probabilities into fragile crowd noise.
background
Prediction Markets API

Historical Prediction Market Data: What to Analyze

What to analyze in historical prediction markets data? What’s actually meaningful, and what insights you can extract without falling into noise?
background
Prediction Markets API

From Market Data to Predictive Models

Prediction market data turns crowd trades into live probabilities, helping predictive models learn when belief is stable and when it’s just noise.
background
Prediction Markets API

Confidence Scores: Measuring How Certain a Market Is

Two markets can both show 60%… and one of them is solid. while the other is basically a coin flip wearing a suit.
background
Prediction Markets API

What Happens When a Prediction Market Resolves?

Prediction markets end at resolution, when trading stops and a final outcome settles prices to 1.00 or 0.00.
background
Prediction Markets API

Using Prediction Markets as a Forecasting API

FinFeedAPI exposes prediction market prices and history so you can see when belief actually shifts, not just when charts move
background
Prediction Markets API

Prediction Market Volatility: Signal or Noise?

Prediction market volatility only matters when it reflects real belief change, and prediction market data shows which price moves hold and which fade into noise.
background
Prediction Markets API

Minority Beliefs and Early Signals in Prediction Markets

Minority beliefs in prediction markets often appear as quiet price pressure before consensus forms, and prediction market data reveals these early probability signals.

Ready to try FinFeedAPI?

Get prediction markets data, stocks, FX, SEC filings, and more!

Start With Free Credits Get In touch