> ## Documentation Index
> Fetch the complete documentation index at: https://docs.x402layer.cc/llms.txt
> Use this file to discover all available pages before exploring further.

# Documentation

> Learn how to monetize your APIs with crypto payments

# Singularity Layer Documentation

Learn how to build, sell, and secure agentic APIs with x402-powered endpoints. Accept crypto payments on Base and Solana.

## Quick Links

<CardGroup cols={2}>
  <Card title="User Guide" icon="book" href="/user-guide/getting-started">
    Learn how to navigate the dashboard, create endpoints, manage credits, and use payment components.

    * Getting Started
    * Wallet Connection
    * Creating Endpoints
    * Managing Credits
  </Card>

  <Card title="Agentic Access" icon="code" href="/agentic-access/introduction">
    Developer guide for programmatic API access with automatic crypto payments across private-key, AWAL, and optional OWS wallet modes.

    * Request → 402 → Pay Flow
    * Private Key, AWAL, or OWS Setup
    * Code Examples
    * API Reference
  </Card>
</CardGroup>

## Developer surfaces

<CardGroup cols={3}>
  <Card title="MCP server" icon="server" href="/agentic-access/mcp-server">
    Connect agents and tools directly to the Singularity control plane through the MCP surface.
  </Card>

  <Card title="API reference" icon="terminal" href="/api-reference/introduction">
    Browse the structured API reference and endpoint documentation.
  </Card>

  <Card title="SDK & receipts" icon="shield-check" href="/payments/sdk-receipts">
    Verify payment receipts server-side with the Singularity SDK helpers.
  </Card>
</CardGroup>

## Key Features

<CardGroup cols={3}>
  <Card title="Pay-per-request">
    Set exact prices for each API call
  </Card>

  <Card title="Credit packs">
    Sell credits for multiple calls
  </Card>

  <Card title="Multi-chain">
    Base, Solana, ETH, Polygon, BSC, Monad
  </Card>

  <Card title="Embeddable">
    Drop-in payment widgets
  </Card>

  <Card title="Agent-friendly">
    Clear 402 protocol
  </Card>

  <Card title="Analytics">
    Track revenue and usage
  </Card>
</CardGroup>

## Payments and trust

<CardGroup cols={2}>
  <Card title="Webhooks" icon="bolt" href="/payments/webhooks">
    Verify webhook signatures and wire payment events into your backend safely.
  </Card>

  <Card title="SDK & receipts" icon="shield-check" href="/payments/sdk-receipts">
    Verify signed receipt tokens server-side with the Singularity SDK helpers.
  </Card>
</CardGroup>