ToolVet
80trust / 100

Base Storage

by base-storage in Onchain & crypto

x402 APIPassing, checked 2 h ago

Read a contract storage slot on Base mainnet via eth_getStorageAt - the raw 32-byte value, decoded as hex and unsigned integer, zero-filled if unset.

POST
https://x402.agentindex.world/base/storage
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
141 ms
231 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://x402.agentindex.world/base/storage

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.agentindex.world/base/storage
content-type: application/json

{
  "address": "0xb125e6687d4313864e53df431d5425969c15eb2f",
  "slot": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
}

Parameters

ParameterTypeRequiredDescription
addressstringYes
slotanyYes

Example response

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

{
  "address": "0xb125e6687d4313864e53df431d5425969c15eb2f",
  "slot": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc",
  "value": "0x000000000000000000000000c1455ae6df6cd808ed677f048e434e22892682a7",
  "value_decimal": "1103243528667961629076029746875274476749108994727"
}

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.agentindex.world/base/storage' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xb125e6687d4313864e53df431d5425969c15eb2f","slot":"0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"}'

# 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.agentindex.world/base/storage' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xb125e6687d4313864e53df431d5425969c15eb2f","slot":"0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"}' \
  | 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.agentindex.world%2Fbase%2Fstorage&method=POST
const res = await pay("https://x402.agentindex.world/base/storage", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0xb125e6687d4313864e53df431d5425969c15eb2f",
    "slot": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
  }),
});
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.agentindex.world/base/storage",
        json={
            "address": "0xb125e6687d4313864e53df431d5425969c15eb2f",
            "slot": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402219 ms$0.005
6 h agoPassed402218 ms$0.005
10 h agoPassed40274 ms$0.005
15 h agoPassed402231 ms$0.005
19 h agoPassed402191 ms$0.005
Show 10 older checks
23 h agoPassed402134 ms$0.005
27 h agoPassed402104 ms$0.005
31 h agoPassed402127 ms$0.005
35 h agoPassed402214 ms$0.005
39 h agoPassed402133 ms$0.005
43 h agoPassed402166 ms$0.005
47 h agoPassed402129 ms$0.005
2 days agoPassed402141 ms$0.005
2 days agoPassed402135 ms$0.005
2 days agoPassed402169 ms$0.005