ToolVet
77trust / 100

Merkle Build

by EVM & Solana Utility Tools in Onchain & crypto

x402 APIPassing, checked 2 h ago

Keccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with domain separation and explicit odd-node promotion.

POST
https://chain-tools.use.x402atlas.com/merkle/build
Price
$0.01
per call in USDC
Uptime
100%
last 30 days
Response time
434 ms
478 ms 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

How to call it

POST https://chain-tools.use.x402atlas.com/merkle/build

Each call costs $0.01 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://chain-tools.use.x402atlas.com/merkle/build
content-type: application/json

{
  "leaves": [
    "0x616c706861",
    "0x62657461",
    "0x67616d6d61"
  ]
}

Parameters

ParameterTypeRequiredDescription
leavesarray of stringYesRaw leaves in stable caller order; duplicate values remain distinct by zero-based index

Example response

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

Example response, 44 lines
{
  "algorithm_version": "keccak256-sorted-pairs-v1",
  "leaf_count": 3,
  "leaf_hashes": [
    "0x180a512e153366b1510bf090b11069c19394ab868093ef5290ead07f1fbb3386",
    "0x5b3931176fc5f22736bfc5393315c63244f57e672b5017c675220ec7de504ae6",
    "0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
  ],
  "operation": "merkle-build",
  "proofs": [
    {
      "index": 0,
      "steps": [
        {
          "hash": "0x5b3931176fc5f22736bfc5393315c63244f57e672b5017c675220ec7de504ae6"
        },
        {
          "hash": "0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
        }
      ]
    },
    {
      "index": 1,
      "steps": [
        {
          "hash": "0x180a512e153366b1510bf090b11069c19394ab868093ef5290ead07f1fbb3386"
        },
        {
          "hash": "0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
        }
      ]
    },
    {
      "index": 2,
      "steps": [
        {
          "hash": "0xbfa0350c48ccd55fb3a8315a6d6bfc41877772eaebfcba73cb195984df5b3d32"
        }
      ]
    }
  ],
  "root": "0x40a0fa2d0ce898ef138c3403645be77705df9d485ecc137b02b35eb9fdeaaf94",
  "warnings": []
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://chain-tools.use.x402atlas.com/merkle/build' \
  -H 'content-type: application/json' \
  --data-raw '{"leaves":["0x616c706861","0x62657461","0x67616d6d61"]}'

# 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://chain-tools.use.x402atlas.com/merkle/build' \
  -H 'content-type: application/json' \
  --data-raw '{"leaves":["0x616c706861","0x62657461","0x67616d6d61"]}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fchain-tools.use.x402atlas.com%2Fmerkle%2Fbuild&method=POST
const res = await pay("https://chain-tools.use.x402atlas.com/merkle/build", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "leaves": [
      "0x616c706861",
      "0x62657461",
      "0x67616d6d61"
    ]
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://chain-tools.use.x402atlas.com/merkle/build",
        json={
            "leaves": [
                "0x616c706861",
                "0x62657461",
                "0x67616d6d61",
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

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Recent checks

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