ToolVet
75trust / 100

Wallet Portfolio

by Blackwood State Wallet Portfolio in Onchain & crypto

x402 APIPassing, checked 2 h ago

Use when you need a multi-chain wallet balance, a wallet portfolio or the recent transaction history of an address on Ethereum, Base or Solana. Do not use for uSD values, NFTs, DeFi positions, long-tail tokens or chains beyond Ethereum, Base and Solana. Returns JSON with a wallet's native and major-token balances on Ethereum, Base or Solana plus its latest transfers in and out, in one call, leaving airdrop spam out for 0.005 USDC per call. Typical response time 3000 ms (p95). Category: Data.

POST
https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
385 ms
2.3 s slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio
content-type: application/json

{
  "address": "0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7",
  "chains": [
    "base"
  ],
  "historyLimit": 2
}

Parameters

ParameterTypeRequiredDescription
addressstringYesWallet address: 0x... for Ethereum and Base, or a Solana address, e.g. 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045
chainsarray of stringNoChains to read (ethereum and base for a 0x address, solana for a Solana address, when omitted), e.g. ["base"]
historyLimitintegerNoLatest transfers to return per chain, 0 to 25 (10 when omitted), e.g. 5

Example response

The provider's example. We can't check it without paying.

Example response, 39 lines
{
  "address": "0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7",
  "base": {
    "history": [
      {
        "amount": "0.005",
        "asset": "USDC",
        "counterparty": "0x87db3c25d1e8e40f8ef240d48a711b0c355cf8cf",
        "direction": "in",
        "hash": "0xeca4b84c7be1b01b92314dd139ba623f4065ea2d9af702cdca1a6e006fc92f09",
        "time": "2026-10-17T23:55:53.000Z"
      },
      {
        "amount": "0.005",
        "asset": "USDC",
        "counterparty": "0x87db3c25d1e8e40f8ef240d48a711b0c355cf8cf",
        "direction": "in",
        "hash": "0x618c2559d32eef4fa33af283a53db6e96dacd049c22a586a8dc4bc3a603326e4",
        "time": "2026-10-17T23:54:41.000Z"
      }
    ],
    "native": {
      "balance": "0",
      "symbol": "ETH"
    },
    "tokens": [
      {
        "balance": "0.015",
        "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "decimals": 6,
        "symbol": "USDC"
      }
    ]
  },
  "ethereum": null,
  "note": "Balances of the native coin and major tokens of each chain (a fixed list; airdrop spam and long-tail tokens are left out). History: the latest native and major-token transfers in and out; on Solana, the net change per transaction. Amounts are decimal strings in token units, without USD values.",
  "solana": null,
  "updatedAt": "2026-10-18T02:46:08.863Z"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7","chains":["base"],"historyLimit":2}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7","chains":["base"],"historyLimit":2}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402-gateway.blackwoodstate8.workers.dev%2Fv1%2Fwallet-portfolio&method=POST
const res = await pay("https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7",
    "chains": [
      "base"
    ],
    "historyLimit": 2
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio",
        json={
            "address": "0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7",
            "chains": [
                "base",
            ],
            "historyLimit": 2,
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402385 ms$0.005
7 h agoPassed4022.3 s$0.005