LlamaIndex Adapter

npm install llamaindex @llamaindex/workflow @llamaindex/openai agent402-llamaindex @x402/fetch @x402/core @x402/evm viem

import { agent } from "@llamaindex/workflow";
import { openai } from "@llamaindex/openai";
import { agent402Tools } from "agent402-llamaindex";
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const payClient = new x402Client();
registerExactEvmScheme(payClient, { signer: privateKeyToAccount(process.env.AGENT_KEY) });
const payFetch = wrapFetchWithPayment(fetch, payClient);

// web search, then a cited answer: both paid per call from the wallet
const { tools } = await agent402Tools({ slugs: ["search", "answer"], freeOnly: false, fetch: payFetch });

const myAgent = agent({ tools, llm: openai({ model: "gpt-4o-mini" }) });
const res = await myAgent.run("Search the web for x402 payment protocol adoption, then answer with citations: what is the x402 payment protocol?");
console.log(res.data.result);

// free tier: every tool listed here is compute-payable (proof-of-work, no wallet)
const { tools } = await agent402Tools({ slugs: ["hash", "markdown-to-html", "text-stats", "uuid"] });

// Load only these tools (a short list gives the model better tool selection).
agent402Tools({ slugs: ["hash", "markdown-to-html"] })

// Default true: keep only compute-payable tools, paid with proof-of-work. Set false to include wallet-only tools.
agent402Tools({ slugs: ["extract", "hash"], freeOnly: false, fetch: payFetch })

// A payment-wrapped fetch (@x402/fetch for x402, mppx for MPP) that pays wallet-only tools.
agent402Tools({ freeOnly: false, fetch: payFetch })

// Point to a self-hosted Agent402 instance.
agent402Tools({ baseUrl: "https://my-agent402.example.com" })