> ## Documentation Index
> Fetch the complete documentation index at: https://docs.predictiondata.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

PredictionData.dev is a tick-level market data platform for all prediction markets. Every message from the exchange is captured via colocated, redundant websocket connections and stored multi-region so you never miss a tick.

<Columns cols={2}>
  <Card title="First time here?" icon="rocket" href="/quickstart">Get an API key, list exports, and download your first file in a few minutes.</Card>
  <Card title="Need help?" icon="circle-question" href="/common-problems">404s, auth errors, date format, or slug vs asset ID? See Common problems.</Card>
</Columns>

There are **no rate limits** on how many requests per second you make or how
much data you download! Our infrastructure can support **terabytes** of outbound data per second.
For bulk exports from the database, reach out to [calder@predictiondata.dev](mailto:calder@predictiondata.dev).

## Overview

Markets are made available as flat files (CSV for all exchanges, plus Parquet for Kalshi) for ease of use. **[Quickstart](/quickstart)** gets you from zero to downloading in a few steps. Run into an issue? See **[Common problems](/common-problems)**. Exchange-specific docs (Polymarket, Kalshi) are under **Datasets**.
New exchanges are constantly in development. If you don't see one, ask
[calder@predictiondata.dev](mailto:calder@predictiondata.dev)!

## Market Discovery

We employ a low-latency polling system to discover new markets. Markets are
being watched within 1 second of being created. Please contact
[calder@predictiondata.dev](mailto:calder@predictiondata.dev) for enterprise feeds with **\<100ms** latency.

## Data Collection

All data is collected on redundant websockets to avoid any dataloss. Collection
servers are colocated to exchanges to provide minimal packet loss and latency. For reference, p50 latency to Polymarket's matching engine is **\<10ms**.

## Data Freshness

Exports are produced daily. Polymarket exports are available through
datasets.predictiondata.dev by 2am UTC. Kalshi exports are available through
api.predictiondata.dev on a similar schedule. If you require faster access
to data, please reach out to [calder@predictiondata.dev](mailto:calder@predictiondata.dev).