@arbiterlabs/keeperhub

An agent that cannot execute what it has not checked.

KeeperHub makes execution reliable — nonces, retries, gas, RPC failover. It does not make execution correct: a transaction granting a stranger unlimited spending rights is submitted just as dependably as a legitimate transfer. This puts judgment in front of it.

npm install @arbiterlabs/keeperhub

import { GuardedAgent } from "@arbiterlabs/keeperhub";

const agent = new GuardedAgent({
  arbiterUrl: "https://arbiter-hs23.onrender.com",
  arbiterPrivateKey: process.env.ALGO_KEY,
  keeperHubApiKey: process.env.KEEPERHUB_API_KEY,
  allowDecisions: ["allow"],
});

const result = await agent.execute({
  kind: "erc20-approve",
  chainId: 1,
  token: USDC,
  spender,
  amount: MAX_UINT256,
  description: "Approve USDC",
});

result.executed;        // false — KeeperHub was never called
result.refusedBecause;  // "Arbiter returned BLOCK (risk 100/100): ..."

The guard is structural

There is no path through GuardedAgent that reaches KeeperHub without a verdict first, so an agent cannot skip the check by forgetting to call it.

allowDecisions defaults to ["allow"] alone. A warn means "proceed only if an operator accepts this risk", and an autonomous agent has no operator standing by — so anything short of a clean verdict stops.

What it catches

Unlimited ERC-20 approvals, setApprovalForAll, permit signatures, transfers to the zero address, and approvals granted to EIP-7702 delegated accounts — wallets that return contract code from eth_getCode and remain spendable by whoever holds the private key. A naive contract check waves those straight through.

Paying

Calls are settled per request in USDC on Algorand over x402. There is no API key and no account — payment is the authentication.

Your payer account needs USDC and must be opted in to the USDC asset. On Algorand a transfer to an account that has not opted in is rejected outright, so an un-opted-in payer cannot pay at all. Fees are sponsored by the facilitator, so the payer does not need ALGO.

| Route | Price | |---|---| | Transaction verdict | $0.002 | | Counterparty verdict | $0.01 | | Human judgment | $0.25 |

Full documentation: https://arbiter-hs23.onrender.com/docs

Licence

MIT