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

# API Overview

> Explore Uniblock’s Unified JSON-RPC, Unified APIs, and Direct Provider APIs — with intelligent routing across hundreds of chains.

Welcome to Uniblock’s API Reference. Use this page to quickly find the right API for your use case, learn what Uniblock does for each request, and jump to supported chains.

<Card title="Get started on the dashboard" icon="rocket" href="https://dashboard.uniblock.dev" horizontal>
  Create a project, grab your API key, and start making requests in minutes.
</Card>

## What is Uniblock?

Uniblock is an AI-powered routing layer for Web3. For every request, Uniblock selects the best upstream provider based on reliability, cost, and performance — with automatic retries and failover to help keep your calls from failing.

<Columns cols={3}>
  <Card title="Smart provider routing" icon="shuffle" href="/guides/uniblock/autorouting/uniblock-auto-routing">
    Automatically routes requests to the best provider per chain and method.
  </Card>

  <Card title="Automatic retries" icon="arrows-rotate" href="/guides/uniblock/autorouting/uniblock-auto-retry">
    Retries transient failures so your requests are more resilient.
  </Card>

  <Card title="Failover & fallback" icon="life-ring" href="/guides/uniblock/autorouting/uniblock-backup">
    Falls back to alternate providers when an upstream is degraded.
  </Card>
</Columns>

## APIs

Choose the API style that best matches what you’re building.

<Columns cols={3}>
  <Card title="Unified JSON-RPC" icon="terminal" href="/reference/unified-api/overview-jsonrpc">
    The foundation for blockchain interaction — one endpoint for JSON-RPC across
    hundreds of chains.
  </Card>

  <Card title="Unified APIs" icon="layer-group" href="/reference/unified-api/overview-unified-apis">
    Higher-level endpoints for common data needs like tokens, NFTs,
    transactions, and market data.
  </Card>

  <Card title="Direct Provider APIs" icon="plug" href="/reference/direct-api/overview-direct-api">
    Provider-specific methods when you need an endpoint that isn’t available in
    Unified APIs.
  </Card>
</Columns>

## Unified JSON-RPC

Use Unified JSON-RPC when you want maximum compatibility with existing tooling and standard blockchain methods.

<Columns cols={2}>
  <Card title="JSON-RPC reference" icon="book" href="/reference/jsonrpc-docs/1/ethereum-overview">
    Browse supported methods, request/response formats, and examples.
  </Card>

  <Card title="Supported methods by chain" icon="link" href="/reference/resources/chains/supported-json-rpc-chains">
    See which JSON-RPC methods are supported on each chain.
  </Card>
</Columns>

## Unified APIs

Use Unified APIs when you want higher-level, easier-to-use endpoints for common workflows without stitching together raw JSON-RPC calls.

<Columns cols={3}>
  <Card title="Token API" icon="coins" href="/reference/unified-api/api-overview-token">
    Token metadata, balances, and contract-related token data.
  </Card>

  <Card title="Market Data API" icon="chart-line" href="/reference/unified-api/api-overview-market-data">
    Pricing and market data endpoints to power dashboards and analytics.
  </Card>

  <Card title="NFT API" icon="images" href="/reference/unified-api/api-overview-nft">
    NFT collections, assets, and related NFT metadata.
  </Card>

  <Card title="Transaction API" icon="arrow-right-arrow-left" href="/reference/unified-api/api-overview-transaction">
    Transaction lookups and transaction-related data.
  </Card>

  <Card title="Scan API" icon="magnifying-glass" href="/reference/unified-api/api-overview-scan">
    Chain scanning and explorer-style access patterns.
  </Card>

  <Card title="Webhook API" icon="bell" href="/reference/webhook/webhooks-overview">
    Event-driven updates so you don’t have to poll.
  </Card>
</Columns>

## Direct Provider APIs

Direct APIs give you access to provider-specific endpoints exactly as offered by the upstream provider. Use this when you need a method that isn’t yet abstracted into Uniblock’s Unified APIs.

<Card title="Browse Direct APIs" icon="plug" href="/reference/direct-api/overview-direct-api" horizontal>
  Find provider-specific methods and quickly integrate them into your app.
</Card>

## Supported chains

Uniblock supports a wide range of blockchain networks, with availability varying by product. Use the links below to confirm support for your service.

<Columns cols={3}>
  <Card title="Unified JSON-RPC chains" icon="sitemap" href="/reference/resources/chains/supported-json-rpc-chains">
    Supported JSON-RPC methods and coverage by chain.
  </Card>

  <Card title="Unified API chain IDs" icon="hashtag" href="/reference/resources/chains/supported-chains">
    Chain ID mapping and supported networks for Unified APIs.
  </Card>

  <Card title="Market Data supported chains" icon="chart-simple" href="/reference/resources/chains/supported-market-data-chains">
    Networks supported by the Unified Market Data API.
  </Card>
</Columns>