payper-ai

Vercel AI SDK tools that let any agent rent real GPUs and pay per second in USDG over x402 on Robinhood Chain — one wallet, no account, no KYC.

npm install payper-ai

ai, viem, and zod come along (ai is a peer dependency you already have).

Use it

Add the tools to any generateText / streamText call and your agent can rent GPUs on its own:

import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";
import { payperTools } from "payper-ai";

const result = await generateText({
  model: openai("gpt-4o"),
  prompt: "Rent me an H100 for an overnight fine-tune, budget $5.",
  tools: payperTools({ walletKey: process.env.PAYPER_WALLET_KEY }),
  stopWhen: stepCountIs(5), // let the model call list_gpus then rent_gpu
});

console.log(result.text);

Built for AI SDK v5+ (tools use inputSchema). If you're still on v4, upgrade — that's where the modern tool API lives.

That's it — the model calls list_gpus, then rent_gpu, and you get back a live pod with an access code.

Configuration

payperTools(opts) accepts:

| Option | Default | Meaning | |---|---|---| | walletKey | process.env.PAYPER_WALLET_KEY | 0x… private key of a wallet holding USDG on Robinhood Chain (chain 4663). It signs payments (gasless — Payper pays the gas). | | gateway | process.env.PAYPER_GATEWAY → https://app.payperlabs.com | Payper gateway URL. |

Use a dedicated agent wallet, not your main one, and keep only what you want the agent to be able to spend.

Tools

| Tool | What it does | |---|---| | list_gpus | Live catalog of GPUs + per-hour USD prices | | rent_gpu | Rent one. Signs a gasless USDG payment up to maxUsd, returns an access code + connection details. Charged only for seconds used. | | check_session | State, connection details, and spend for a session | | stop_session | Stop and refund the unused USDG automatically |

How it works

rent_gpu runs the whole x402 flow for the agent: it requests a GPU, receives an HTTP 402 with the price, signs one EIP-3009 authorization for the cap (gasless), and retries. Unused balance is refunded on stop_session. No account, no card, no invoice — just a wallet.

Direct use (no LLM)

The raw flows are exported too, if you want to rent from plain code:

import { makeClient } from "payper-ai";

const payper = makeClient({ walletKey: process.env.PAYPER_WALLET_KEY });
const gpus = await payper.listGpus();
const session = await payper.rentGpu("rtx-3060", 2);

Related

• payper-mcp — the same capability for MCP clients (Claude Desktop, Cursor, Cline)
• Docs: https://payperlabs.com/docs.html

MIT © Payper