ToolVet
77trust / 100

Batch Estimate

by gateway.spraay.app in Other

x402 APIPassing, checked 2 h ago

Estimate batch gas and protocol fee. Units: amounts[] are RAW base units (USDC 6dp: "1500000" = $1.50); totalAmount/fee/totalWithFee are human-decimal strings; suggestedGasLimit is a decimal string.

POST
https://gateway.spraay.app/api/v1/batch/estimate
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
436 ms
575 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

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Status and outage history · Atom feed

How to call it

POST https://gateway.spraay.app/api/v1/batch/estimate

Each call costs $0.001 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://gateway.spraay.app/api/v1/batch/estimate
content-type: application/json

{
  "amounts": [
    "1500000",
    "1500000"
  ],
  "recipients": [
    "0x1111111111111111111111111111111111111111",
    "0x2222222222222222222222222222222222222222"
  ],
  "token": "USDC"
}

Parameters

ParameterTypeRequiredDescription
amountsarrayNo
recipientCountnumberNo
recipientsarrayNo
senderstringNo
tokenstringNo

Example response

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

{
  "fee": "0.009",
  "feePercent": "0.3%",
  "recipientCount": 2,
  "success": true,
  "suggestedGasLimit": "230000",
  "token": {
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "decimals": 6,
    "isETH": false,
    "symbol": "USDC"
  },
  "totalAmount": "3.0",
  "totalWithFee": "3.009"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://gateway.spraay.app/api/v1/batch/estimate' \
  -H 'content-type: application/json' \
  --data-raw '{"amounts":["1500000","1500000"],"recipients":["0x1111111111111111111111111111111111111111","0x2222222222222222222222222222222222222222"],"token":"USDC"}'

# 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://gateway.spraay.app/api/v1/batch/estimate' \
  -H 'content-type: application/json' \
  --data-raw '{"amounts":["1500000","1500000"],"recipients":["0x1111111111111111111111111111111111111111","0x2222222222222222222222222222222222222222"],"token":"USDC"}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgateway.spraay.app%2Fapi%2Fv1%2Fbatch%2Festimate&method=POST
const res = await pay("https://gateway.spraay.app/api/v1/batch/estimate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "amounts": [
      "1500000",
      "1500000"
    ],
    "recipients": [
      "0x1111111111111111111111111111111111111111",
      "0x2222222222222222222222222222222222222222"
    ],
    "token": "USDC"
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://gateway.spraay.app/api/v1/batch/estimate",
        json={
            "amounts": [
                "1500000",
                "1500000",
            ],
            "recipients": [
                "0x1111111111111111111111111111111111111111",
                "0x2222222222222222222222222222222222222222",
            ],
            "token": "USDC",
        },
    )
    print(res.status_code, res.text)

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