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

# Overview

> An overview of Prism's data tracking capabilities across EVM chains.

Prism is a high-performance analytics layer designed to make EVM blockchain data accessible, reliable, and actionable for traders, analysts, and builders.

## Why Data Tracking on EVM Chains?

The EVM ecosystem is not one chain but many, each with its own liquidity, its own set of deployed protocols, and its own block cadence. The same token symbol can exist on four chains with four different contract addresses and four different prices.

Prism resolves this by ingesting every supported chain through a single pipeline and exposing the results behind one API. Every dataset is keyed by `chain_id`, so a query is always scoped to exactly one chain, and comparing activity across chains is a matter of issuing the same request with a different `chain_id`.

## Supported Chains

Every request and subscription takes a required `chain_id` that selects the chain to query.

| Chain           | `chain_id` |
| --------------- | ---------- |
| Ethereum        | `1`        |
| BNB Smart Chain | `56`       |
| Base            | `8453`     |
| Robinhood Chain | `4663`     |

Protocol coverage differs per chain. See [DEX Data Sources](/documentation/evm/dex/overview#data-sources) for which protocols are indexed where.

## Differences from Solana

If you already use the Solana API, the EVM API is the same shape with four consistent differences.

|                 | Solana           | EVM                                  |
| --------------- | ---------------- | ------------------------------------ |
| Chain selector  | none             | `chain_id` required on every request |
| Addresses       | base58           | hex, `0x`-prefixed                   |
| Transaction ID  | base58 signature | 32-byte hex hash                     |
| Block reference | `block_slot`     | `block_number`                       |

## Explore the Data

<CardGroup cols={2}>
  <Card title="DEX" icon="chart-candlestick" href="/documentation/evm/dex/overview">
    Datasets for trading behavior, liquidity movements, and token dynamics across EVM decentralized exchanges.
  </Card>

  <Card title="Assets" icon="coins" href="/documentation/evm/assets/overview">
    Datasets for ERC-20 token transfers across every supported EVM chain.
  </Card>
</CardGroup>