x402 trending sellers

Momentum radar for the x402 seller ecosystem - which sellers are heating up, graded for wash-trade resistance. Send GET /api/x402-trending with no required fields (3 optional) and pay $0.005 per call over x402 or MPP (there is no free tier). It returns a JSON object with window, sort, include, limit, totalSellers and 5 more.

Reads the hourly on-chain leaderboard (real Base USDC settlements) and adds per-seller signals the raw board doesn't have: organicScore (uniqueBuyers/callsSettled - 1000 calls from 2 buyers smells like self-dealing, 1000 from 400 is organic demand) and avgTicketUsd. Rank by sort: 'usd' (revenue, default), 'calls' (volume), 'organic' (buyer diversity - the honest-demand lens), or 'buyers' (reach). include='external' (default) excludes Agent402's own row; 'all' keeps it. Once ~7 days of persisted snapshots accrue, each row also carries deltaVsPrevWeek + trend (rising/flat/cooling/new) - the wow envelope says whether those are live; deltas are never faked. ?sort=organic&limit=10

Category: Payments & x402 · Tags: x402 trending momentum sellers leaderboard organic wash-trading ecosystem

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Parameters

Example request

curl -i "https://agent402.tools/api/x402-trending?sort=usd&limit=10&include=external"

Without payment this returns HTTP 402 Payment Required with the exact price for x402-trending; any x402 v2 or MPP client pays it and retries.

Example response

{
  "window": "24h",
  "sort": "usd",
  "include": "external",
  "limit": 10,
  "totalSellers": 214,
  "sellers": [
    {
      "rank": 1,
      "name": "example-seller",
      "homepage": "https://seller.example",
      "network": "base",
      "wallet": "0x1111111111111111111111111111111111111111",
      "callsSettled": 3541,
      "totalUsd": 41.2,
      "uniqueBuyers": 402,
      "organicScore": 0.1135,
      "avgTicketUsd": 0.011635
    }
  ],
  "wow": {
    "available": false,
    "note": "no persisted snapshot ~7 days old yet - week-over-week deltas activate automatically as history accrues"
  },
  "freshness": {
    "asOf": "2026-07-14T00:00:00.000Z",
    "stale": false,
    "staleFromDisk": false,
    "refreshFailing": false,
    "lastRefreshAt": "2026-07-14T00:00:00.000Z",
    "note": "measured by the scan named in asOf"
  },
  "snapshotAsOf": "2026-07-14T00:00:00.000Z",
  "generatedAt": "2026-07-14T00:00:05.000Z"
}

From an MCP client

catalog.call {
  "slug": "x402-trending",
  "params": {
    "sort": "usd",
    "limit": 10,
    "include": "external"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for x402-trending; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A POST with a JSON body to /api/x402-trending is served as this GET, with the body as the input.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/x402-trending?sort=usd&limit=10&include=external");

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