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

# Build AI Agents

> Connect AI agents to real-time Web3 data and crypto social intelligence

Chainbase provides multiple integration paths for AI agents and LLM applications to access on-chain data and crypto social signals.

## Quick Start: MCP

The fastest way to connect an AI client to Chainbase data. MCP (Model Context Protocol) gives your AI agent direct access to token, wallet, NFT, and transaction data through natural language.

<Tabs>
  <Tab title="Claude Code">
    ```bash theme={null}
    # Web3 data (requires API key)
    claude mcp add --transport http chainbase https://api.chainbase.com/v1/mcp --header "X-API-KEY: YOUR_API_KEY"

    # Tops social data (free)
    claude mcp add --transport http tops https://api.chainbase.com/tops/v1/mcp
    ```
  </Tab>

  <Tab title="Cursor">
    Add to `~/.cursor/mcp.json`:

    ```json theme={null}
    {
      "mcpServers": {
        "chainbase": {
          "url": "https://api.chainbase.com/v1/mcp",
          "headers": { "X-API-KEY": "YOUR_API_KEY" }
        },
        "tops": {
          "url": "https://api.chainbase.com/tops/v1/mcp"
        }
      }
    }
    ```
  </Tab>

  <Tab title="Claude Desktop">
    Settings > Connectors > Add custom connector

    * Name: `Chainbase Web3 Data`
    * Endpoint: `https://api.chainbase.com/v1/mcp`

    For Tops (free): add another connector with endpoint `https://api.chainbase.com/tops/v1/mcp`
  </Tab>
</Tabs>

Once connected, ask your AI agent questions like:

* "What are the top 10 holders of USDT on Ethereum?"
* "What's trending in crypto right now?"
* "Show me the NFTs owned by vitalik.eth"

Full reference: [Web3 Data MCP](/resources/ai/mcp) | [Tops Data MCP](/resources/ai/mcp-tops)

## x402 Payment Protocol

Enable AI agents to autonomously pay for API calls using stablecoins (USDC) via the HTTP 402 standard. No subscriptions — just \$0.002 per call.

```python theme={null}
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

client = x402ClientSync()
register_exact_evm_client(client, EthAccountSigner(account))
session = x402_requests(client)

response = session.get(
    "https://api.chainbase.com/v1/token/holders?chain_id=1&contract_address=0xdac17f958d2ee523a2206206994597c13d831ec7",
    headers={"x-api-key": "x402"}
)
```

Full reference: [x402 Integration](/resources/ai/x402)

## Web3 Data Skill for Claude Code

A Claude Code skill for on-chain data and crypto social intelligence via natural language:

```bash theme={null}
npx skills add https://github.com/lxcong/web3-data-skill --skill web3-data
```

```
> /web3-data top 10 holders of USDT on Ethereum
> /web3-data what are the trending crypto narratives?
```

Full reference: [Web3 Data Skill](/resources/ai/web3-data-skill)

## Next Steps

* [Explore All Products](/getting-started/explore-all-products) — See all Chainbase tools
* [CLI Reference](/resources/ai/cli) — Command-line tool also designed for AI agent automation
* [API Reference](/api-reference/overview) — Full endpoint documentation