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

# Introduction

> Live indicative pricing, streamed continuously from TetraFi's liquidity network.

Instead of asking for prices one at a time, subscribe once: the price feed carries continuous indicative updates from TetraFi's solvers and LPs over a single WebSocket. Pick the corridors and size tiers you care about - and, for full-depth consumers, take per-network snapshot streams of the aggregated book.

## Where It Fits

* **Pre-trade sizing** - screen a trade against live prices first, and spend a firm [RFQ](/rfq-api/introduction) quote only once it clears your bar
* **Continuous evaluation** - solvers and aggregators watching TetraFi liquidity around the clock, with zero draw on quote rate limits
* **A standing depth picture** - aggregated LP liquidity across your routed pairs, always current

## Quick Reference

|                    |                                                           |
| ------------------ | --------------------------------------------------------- |
| **Transport**      | WebSocket                                                 |
| **Authentication** | API key or JWT via the `token` query parameter            |
| **Complexity**     | Moderate - you manage subscriptions and decode the stream |

## From Connect to First Price

| Stage | What happens                                                      | Result                                            |
| ----- | ----------------------------------------------------------------- | ------------------------------------------------- |
| 1     | Open `wss://api.tetrafi.io/api/v1/ws?token=<key>`                 | Connection established                            |
| 2     | Subscribe: `prices:{srcChain}:{input}:{dstChain}:{output}:{tier}` | Confirmation per topic                            |
| 3     | Listen                                                            | Price events for your corridors, best level first |

Size tiers (`1k`, `10k`, `100k`, `1m`) let you subscribe at the notional you actually trade - a `100k` subscription prices a hundred-thousand-unit clip, not a spot midpoint. Up to 50 concurrent subscriptions per connection.

See the [Reference](/price-api/reference) for pricing modes and expiry behavior.

## Endpoint Map

| Endpoint                         | Purpose                                                      |
| -------------------------------- | ------------------------------------------------------------ |
| `wss://api.tetrafi.io/api/v1/ws` | The streaming connection - price and order event topics      |
| `GET /api/v1/pairs`              | Resolve tradable pairs and asset addresses for subscriptions |

## Keep Going

<CardGroup cols={2}>
  <Card title="Quickstart" icon="bolt" href="/price-api/quickstart">
    Connect, subscribe, and process the price stream in 10-15 minutes.
  </Card>

  <Card title="Estimating VWAP" icon="chart-line" href="/price-api/guides/vwap-estimation">
    Work out what your size would really cost - without burning a firm quote.
  </Card>
</CardGroup>