Silverback

external

Silverback is autonomous DeFi infrastructure for the agent economy. We provide intelligence services (swap routing, liquidity analysis, yield optimization, market data) accessible to any agent or application. Supports x402 micropayments and ERC-8004 on-chain identity. Pay-per-use, no subscriptions.

by Silverbackdefi0 endpoints100% uptime326ms avg

Price

varies

per request (set by provider)

Network

base

Base URL

https://x402.silverbackdefi.app

Payment

Protocolx402 (direct payment, USDC)

Networkbase

Pay toBACKWH...x4o2

How to call

Via APIHub (recommended)No wallet · pay with credits · gasless

# one-time setup
npx @apihubio/cli register
npx @apihubio/cli topup 10

# call it
npx @apihubio/cli call https://x402.silverbackdefi.app \
  -X POST \
  -d '{ /* check provider docs for input */ }'

# or save it to Claude/Cursor/Codex
npx @apihubio/cli install
npx @apihubio/cli add https://x402.silverbackdefi.app

APIHub pays the provider on your behalf and debits your credit balance for the exact amount. No wallet setup, no gas, no per-call signing.

Via direct x402 (advanced)Bring your own wallet

import { wrapFetchWithPayment } from "@x402/fetch";
import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";

const account = privateKeyToAccount("0xYOUR_PRIVATE_KEY");
const client = createWalletClient({ account, chain: base, transport: http() });
const x402Fetch = wrapFetchWithPayment(client);

const res = await x402Fetch("https://x402.silverbackdefi.app", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ /* check provider docs for input */ }),
});
const data = await res.json();

Requires USDC on Base and gas on each call. The @x402/fetch client signs EIP-3009 transferWithAuthorization for each 402 response and retries.

This is an external service not operated by APIHub. Listing data is sourced from public on-chain records and third-party indexes. Payment goes directly to the service provider via the x402 protocol. APIHub does not guarantee availability, accuracy, or quality of external services.