> ## 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.

# Overview

> Overview of the various APIs available for integrating with the Sequence developer platform.

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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Indexer API</h2>

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          <p>Query blockchain data with powerful filtering and sorting capabilities.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Analytics API</h2>

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          <p>Track user engagement, retention, and transaction metrics for your applications.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Metadata API</h2>

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          <p>Store and retrieve metadata for tokens, collections, and other assets.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Transactions API</h2>

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          <p>Submit and manage blockchain transactions with optimized gas fees and batching.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Marketplace API</h2>

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          <p>Create and manage orders for NFT marketplaces and exchanges.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Node Gateway</h2>

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          <p>Access high-performance RPC nodes with automatic scaling and failover.</p>
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        <h2 className="font-semibold text-base text-gray-800 dark:text-white mt-4">Indexer Gateway</h2>

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          <p>Query blockchain data across multiple chains with a single API request with the Indexer Gateway</p>
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## Authentication

Most Sequence APIs require authentication using either:

* **Project Access Key**: For client-side requests, these are listed as `public`.
* **Service Token**: For server-side requests that require elevated permissions, these require passing a secret bearer token and listed as `secret`.

You can generate these credentials in the [Sequence Builder](https://sequence.build) dashboard.

## Rate Limits

API rate limits vary by tier and available MAUs. Check your project settings in the Sequence Builder dashboard for your specific limits.