How to useAntera.

Use a tool

1. 1

   Have USDC on Base

   Any wallet works. A few cents is enough, and no ETH is needed: the facilitator pays the gas.

2. 2

   Call the tool

   In the app, or from code with any x402 client. A paid tool answers 402 with its exact price.

3. 3

   Sign the price

   Your wallet signs a USDC transfer for that price. Nothing moves yet.

4. 4

   Read the verdict

   Antera checks the answer. Pass: you pay and get the answer. Fail: you pay nothing and get a signed receipt.

Sell your API

1. 1

   Have an https endpoint

   Anything that answers JSON to a GET request.

2. 2

   List it

   On List a tool: test it, set a price, declare the checks, sign with your wallet.

3. 3

   Get paid per answer

   Agents pay your wallet directly, in USDC on Base, only for answers that pass. No cut.

4. 4

   Stake to be picked first

   On Stake: lock USDC behind your promise and show a staked badge.

Three lines

Any x402 client pays Antera tools. The answer always carries the verdict, what was charged and the receipt.

import { wrapFetchWithPayment } from "x402-fetch";
import { privateKeyToAccount } from "viem/accounts";

const pay = wrapFetchWithPayment(fetch, privateKeyToAccount(KEY));
const r = await pay("https://www.antera.sbs/api/call/spot?asset=ETH");
const { ok, result, antera } = await r.json();

// ok === false → antera.charged === "0": the signature was never settled

Endpoints