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

# KillB Developer Platform

> Build powerful crypto payment infrastructure with KillB's on/off-ramp API

## Welcome to KillB

KillB provides a comprehensive platform for cryptocurrency on-ramps and off-ramps across Latin America. Convert between fiat currencies (COP, MXN, USD) and cryptocurrencies (USDC, USDT) seamlessly.

## Choose Your Path

<Tabs>
  <Tab title="Portal (No-Code)">
    **Perfect for individuals and manual transactions**

    Use our web portal to buy and sell crypto without writing code.

    <Card title="Portal Guide" icon="gauge" href="/portal/overview">
      Get started with the KillB OTC Portal →
    </Card>

    <CardGroup cols={2}>
      <Card title="Buy Crypto" icon="download" href="/portal/buy-crypto">
        Convert fiat to crypto
      </Card>

      <Card title="Sell Crypto" icon="upload" href="/portal/sell-crypto">
        Convert crypto to fiat
      </Card>
    </CardGroup>
  </Tab>

  <Tab title="API (Developers)">
    **Perfect for businesses and automated integrations**

    Build powerful crypto payment solutions with our API and SDKs.

    <CardGroup cols={2}>
      <Card title="Quickstart" icon="rocket" href="/quickstart">
        Get up and running in 5 minutes
      </Card>

      <Card title="JavaScript SDK" icon="js" href="/sdks/javascript">
        Use our official SDK with type safety
      </Card>

      <Card title="API Reference" icon="code" href="/api-reference/introduction">
        Explore complete API documentation
      </Card>

      <Card title="Demo Apps" icon="grid" href="/demo-apps">
        Sample implementations
      </Card>
    </CardGroup>
  </Tab>
</Tabs>

## What You Can Build

Build powerful applications with our crypto infrastructure:

<CardGroup cols={3}>
  <Card title="Payment Solutions" icon="credit-card">
    Accept crypto payments and settle in local fiat currencies
  </Card>

  <Card title="Remittance Services" icon="money-bill-transfer">
    Enable fast, low-cost cross-border money transfers
  </Card>

  <Card title="Crypto Exchanges" icon="arrow-right-arrow-left">
    Build on/off-ramp functionality into your platform
  </Card>

  <Card title="Savings Accounts" icon="piggy-bank">
    Offer USD-denominated savings with custodial wallets
  </Card>

  <Card title="Treasury Management" icon="building-columns">
    Manage corporate liquidity across fiat and crypto
  </Card>

  <Card title="Wallets & Neobanks" icon="wallet">
    Integrate fiat-to-crypto conversion capabilities
  </Card>
</CardGroup>

## Key Features

<AccordionGroup>
  <Accordion title="Multi-Currency Support" icon="globe">
    Support for major Latin American fiat currencies (COP, MXN) and stablecoins (USDC, USDT) across multiple blockchain networks including Polygon, Solana, Tron, and more.
  </Accordion>

  <Accordion title="Flexible Payment Methods" icon="credit-card">
    Accept payments via SPEI (Mexico), PSE (Colombia), TRANSFIYA (Colombia), ACH, Wire, and crypto wallets. Choose the best method for your users.
  </Accordion>

  <Accordion title="Comprehensive KYC/KYB" icon="shield-check">
    Built-in KYC and KYB workflows with multiple verification levels (L0-L4) to meet regulatory requirements across different transaction limits.
  </Accordion>

  <Accordion title="Real-Time Webhooks" icon="bell">
    Get instant notifications for ramp status changes, user events, account updates, and transactions to keep your application in sync.
  </Accordion>

  <Accordion title="Pre-Funded Accounts" icon="wallet">
    Set up pre-funded accounts for faster transaction processing and better liquidity management for high-volume operations.
  </Accordion>

  <Accordion title="Sandbox Environment" icon="flask">
    Test your integration safely with our sandbox environment before going live. Simulate cash-in and cash-out operations without real funds.
  </Accordion>
</AccordionGroup>

## Supported Networks

<CardGroup cols={2}>
  <Card title="Fiat Currencies" icon="dollar-sign">
    **COP** - Colombian Peso
    **MXN** - Mexican Peso
    **USD** - US Dollar
  </Card>

  <Card title="Cryptocurrencies" icon="coins">
    **USDC** - USD Coin
    **USDT** - Tether USD

    Networks: Polygon, Solana, Tron, Arbitrum, BSC, ERC20
  </Card>
</CardGroup>

## Popular Use Cases

<Tabs>
  <Tab title="On-Ramp Flow">
    Convert local fiat currency to cryptocurrency:

    1. User creates a quotation (COP/MXN → USDC/USDT)
    2. User creates a ramp with payment details
    3. User sends fiat via local payment method
    4. KillB processes conversion
    5. Crypto delivered to user's wallet
  </Tab>

  <Tab title="Off-Ramp Flow">
    Convert cryptocurrency to local fiat currency:

    1. User creates a quotation (USDC/USDT → COP/MXN)
    2. User creates a ramp with bank account details
    3. User sends crypto to provided address
    4. KillB processes conversion
    5. Fiat delivered to user's bank account
  </Tab>

  <Tab title="Savings Account">
    Provide USD-denominated savings:

    1. Create user with KYC verification
    2. Onboard user to savings program
    3. User deposits funds via ACH/Wire/Crypto
    4. Funds held in custodial USDC account
    5. User can withdraw anytime to bank/wallet
  </Tab>
</Tabs>

## Integration Path

<Steps>
  <Step title="Create Account">
    Sign up for a KillB account and get your API credentials from the portal
  </Step>

  <Step title="Test in Sandbox">
    Use sandbox environment to test your integration with fake data
  </Step>

  <Step title="Build Your App">
    Implement users, accounts, and ramp flows using our API
  </Step>

  <Step title="Go Live">
    Switch to production credentials and start processing real transactions
  </Step>
</Steps>

## Ready to Get Started?

<CardGroup cols={2}>
  <Card title="Read the Quickstart" icon="book-open" href="/quickstart">
    Follow our step-by-step integration guide
  </Card>

  <Card title="Explore the API" icon="terminal" href="/api-reference/introduction">
    Browse the complete API documentation
  </Card>
</CardGroup>

<Info>
  **Need help?** Contact our support team at [tech@killb.com](mailto:tech@killb.com) or visit our [website](https://www.killb.com).
</Info>