ToolVet
82trust / 100

Execute Chain State Snapshot V1

by Macaroon Network in Onchain & crypto

x402 APIPassing, checked 2 h ago

Current block number and gas price for Base and Polygon mainnet, fetched live via RPC on every call. Unlike this catalogue's corpus-search listings, this makes a real outbound network call on purchase -- freshness is the product, not a stored snapshot.

POST
https://api.macaroonnetwork.com/execute/chain-state-snapshot-v1
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
245 ms
319 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://api.macaroonnetwork.com/execute/chain-state-snapshot-v1

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://api.macaroonnetwork.com/execute/chain-state-snapshot-v1
content-type: application/json

{
  "input": {
    "network": "base"
  },
  "predicate": {
    "conditions": [
      {
        "field": "$.block_number",
        "operator": "gte",
        "type": "field_changed",
        "value": 1
      },
      {
        "field": "$.provenance.live_rpc_call",
        "operator": "eq",
        "type": "field_changed",
        "value": true
      }
    ],
    "type": "all"
  }
}

Example response

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

{
  "payload": {
    "block_number": 0,
    "fetched_at": "",
    "gas_price_wei": 0,
    "network": "",
    "provenance": {
      "live_rpc_call": null
    }
  },
  "predicate_passed": true,
  "settled": true
}

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://api.macaroonnetwork.com/execute/chain-state-snapshot-v1' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"network":"base"},"predicate":{"conditions":[{"field":"$.block_number","operator":"gte","type":"field_changed","value":1},{"field":"$.provenance.live_rpc_call","operator":"eq","type":"field_changed","value":true}],"type":"all"}}'

# 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://api.macaroonnetwork.com/execute/chain-state-snapshot-v1' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"network":"base"},"predicate":{"conditions":[{"field":"$.block_number","operator":"gte","type":"field_changed","value":1},{"field":"$.provenance.live_rpc_call","operator":"eq","type":"field_changed","value":true}],"type":"all"}}' \
  | 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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.macaroonnetwork.com%2Fexecute%2Fchain-state-snapshot-v1&method=POST
const res = await pay("https://api.macaroonnetwork.com/execute/chain-state-snapshot-v1", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": {
      "network": "base"
    },
    "predicate": {
      "conditions": [
        {
          "field": "$.block_number",
          "operator": "gte",
          "type": "field_changed",
          "value": 1
        },
        {
          "field": "$.provenance.live_rpc_call",
          "operator": "eq",
          "type": "field_changed",
          "value": true
        }
      ],
      "type": "all"
    }
  }),
});
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://api.macaroonnetwork.com/execute/chain-state-snapshot-v1",
        json={
            "input": {
                "network": "base",
            },
            "predicate": {
                "conditions": [
                    {
                        "field": "$.block_number",
                        "operator": "gte",
                        "type": "field_changed",
                        "value": 1,
                    },
                    {
                        "field": "$.provenance.live_rpc_call",
                        "operator": "eq",
                        "type": "field_changed",
                        "value": True,
                    },
                ],
                "type": "all",
            },
        },
    )
    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 agoPassed402115 ms$0.001
6 h agoPassed402232 ms$0.001
10 h agoPassed402108 ms$0.001
14 h agoPassed402263 ms$0.001
19 h agoPassed402228 ms$0.001
Show 10 older checks
23 h agoPassed402319 ms$0.001
27 h agoPassed402290 ms$0.001
31 h agoPassed402278 ms$0.001
35 h agoPassed402245 ms$0.001
39 h agoPassed402205 ms$0.001
42 h agoPassed402255 ms$0.001
46 h agoPassed402251 ms$0.001
2 days agoPassed402271 ms$0.001
2 days agoPassed402221 ms$0.001
2 days agoPassed402182 ms$0.001