X bulk user lookup

Look up up to 10 X (Twitter) accounts by username in one call. Send POST /api/x-users-lookup with the required field usernames and pay $0.15 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, fetchedAt, count, users and notFound.

Returns each found profile with public metrics (followers, following, tweets, listed), verification status and bio, plus the list of usernames X did not resolve.

Category: Web & documents · Tags: x twitter social x-api tweets users bulk lookup

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/x-users-lookup \
  -H "Content-Type: application/json" \
  -d '{"usernames":["coinbase","base"]}'

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

Example response

{
  "source": "x-api-v2",
  "fetchedAt": "2026-08-20T14:10:00.000Z",
  "count": 1,
  "users": [
    {
      "id": "574032254",
      "username": "coinbase",
      "name": "Coinbase",
      "description": "The future of money is here.",
      "createdAt": "2012-05-07T23:46:41.000Z",
      "verified": true,
      "verifiedType": "business",
      "location": "Global",
      "url": "https://coinbase.com",
      "protected": false,
      "profileImageUrl": "https://pbs.twimg.com/profile_images/.../normal.jpg",
      "metrics": {
        "followers": 6400000,
        "following": 250,
        "tweets": 19000,
        "listed": 9000
      },
      "profileUrl": "https://x.com/coinbase"
    }
  ],
  "notFound": [
    "nosuchuser_xyz"
  ]
}

From an MCP client

catalog.call {
  "slug": "x-users-lookup",
  "params": {
    "usernames": [
      "coinbase",
      "base"
    ]
  }
}

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

Errors and behavior

• usernames is required. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example, so the caller can correct it.
• 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 GET or HEAD to /api/x-users-lookup returns the same 402 quote, so the price can be read without a body.
• 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/x-users-lookup", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "usernames": [
      "coinbase",
      "base"
    ]
  }),
});

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