> ## Documentation Index
> Fetch the complete documentation index at: https://sequence-0fb8d9e6-api_docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Sequence Indexer Gateway

> The Indexer Gateway provides you with tools to query and filter data across multiple Ethereum networks with ease.

# Indexer Gateway

The Sequence Indexer Gateway API is a powerful tool for simultaneously
performing queries across multiple chains. By Leveraging Indexer, the Indexer
Gateway allows you to find and filter data across the Ethereum chains we
support.

The API is not only modeled after Indexer, it actually uses Indexer behind the
scenes, so you can take your code that already works with Indexer and make it
multi-chain with just a few modifications.

## Supported Networks & Endpoints

The Indexer Gateway endpoints accept a list of network IDs (e.g.: `[1, 137,
10]`) or a list of network names (e.g.: `["mainnet", "polygon", "optimism"]`).

You can see the [full list of supported networks
here](https://status.sequence.info).

## Getting Started

Here are a few example queries you can make to multiple networks from your
app, game, or wallet:

* [Fetch tokens & NFTS in any wallet across all chains, including
  metadata](/api-references/indexer-gateway/examples/get-token-balances)

* [Fetch native balances across all
  chains](/api-references/indexer-gateway/examples/get-native-token-balances)

* [Fetch balance updates across all
  chains](/api-references/indexer-gateway/examples/get-balance-updates)

* [Fetch tokens with advanced
  filters](/api-references/indexer-gateway/examples/get-token-balances-details)

* [Fetch tokens, by contract, with advanced
  filters](/api-references/indexer-gateway/examples/get-token-balances-by-contract)