0x · Swap Allowance Holder Quote
agent.api.0x.org
Get the firm quote for a swap using Allowance Holder to set allowances
BaseMarket data & DeFi553 calls / 30d$0.01/ call
$0.01
per call · USDC on Base
Get the indicative price for a swap using Allowance Holder to set allowances
Endpoint
GET https://agent.api.0x.org/v1/x402/swap-allowance-holder-price/3calls / 30dmeasured by x402.new
1paying wallets / 30dmeasured by x402.new
—uptime / 24hmeasured by x402-list.com
—compliance grademeasured by x402-list.com
Listed in 2 directories: bazaar, x402-new. First seen 5 Sept 2026.
Call this service
The endpoint answers an unpaid request with an HTTP 402 and a payment challenge. @x402/fetch signs it, pays in USDC, and retries — you get the result back in one call.
TypeScript · @x402/fetch
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const pay = wrapFetchWithPayment(fetch, account);
const res = await pay("https://agent.api.0x.org/v1/x402/swap-allowance-holder-price/", {
method: "GET",
});
console.log(await res.json());More from agent.api.0x.org
Uptime and compliance: x402-list.com (CC BY 4.0). Safety scores: x402.direct. Call and payer counts: x402.new. AMNT indexes this endpoint and does not host, operate or vouch for it.