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

# Build on Sei with AI

> AI tools for building on Sei — from knowledge injection that makes your AI assistant Sei-aware, to live blockchain tooling that lets it act on-chain.

AI coding assistants are powerful — but they weren't trained on Sei's specifics. Without context, they'll give you generic Ethereum answers: wrong gas patterns, missing dual-address handling, outdated package names, and assumptions about finality that don't hold on a 400ms chain.

Sei provides two complementary tools to fix this.

## Two tools, two roles

<CardGroup cols={2}>
  <Card title="sei-skill" icon="brain" href="/ai/sei-skill">
    **Knowledge injection.** Teaches your AI assistant everything about Sei — architecture, precompiles, wallet patterns, gas behavior, and ecosystem — so every answer it gives is Sei-specific from the start.
  </Card>

  <Card title="MCP Server" icon="plug" href="/ai/mcp-server">
    **Live blockchain access.** Gives your AI assistant tools to read and write on-chain: query balances, send transactions, interact with contracts, and monitor network state in real time.
  </Card>
</CardGroup>

Use them together: sei-skill makes your assistant think in Sei, the MCP Server lets it act on Sei.

## Build AI agents on Sei

<CardGroup cols={3}>
  <Card title="Cambrian Agent Kit" icon="robot" href="/ai/cambrian-agent-kit">
    SDK for building autonomous AI agents with DeFi integrations — staking, lending, swaps, liquidity — powered by LangChain.
  </Card>

  <Card title="Agentic Wallets" icon="wallet" href="/ai/agentic-wallets">
    Wallet infrastructure designed for AI agents: programmable signing, session keys, and policy controls.
  </Card>

  <Card title="x402 Payments" icon="credit-card" href="/ai/x402">
    HTTP-native micropayments so agents can pay per-inference for LLM APIs, data feeds, and other monetized services.
  </Card>
</CardGroup>