10trust / 100

Eip712 Decode

by Lumen Agent Utilities in Onchain & crypto

x402 APIFailing, checked 3 days ago

Decode EIP-712 typed data: domain separator, signing digest, message, and plain-language risk notes (Permit, Permit2, EIP-3009, unlimited values).

POST

https://lumenworks-x402-decoder.onrender.com/v1/eip712/decode

Price: $0.002; per call in USDC
Uptime: 0.0%; last 30 days
Response time: -; no timed checks yet
Last check: Failed; 3 days ago, next any minute now

Run a free test call How to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 3 days ago: Expected HTTP 402, got 404

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

How to call it

POST https://lumenworks-x402-decoder.onrender.com/v1/eip712/decode

Each call costs $0.002 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://lumenworks-x402-decoder.onrender.com/v1/eip712/decode
content-type: application/json

{
  "typedData": {
    "domain": {
      "chainId": 8453,
      "name": "USD Coin",
      "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "version": "2"
    },
    "message": {
      "deadline": "1893456000",
      "nonce": "0",
      "owner": "0x1111111111111111111111111111111111111111",
      "spender": "0x111111125421cA6dc452d289314280a0f8842A65",
      "value": "1000000"
    },
    "primaryType": "Permit",
    "types": {
      "EIP712Domain": [
        {
          "name": "name",
          "type": "string"
        },
        {
          "name": "version",
          "type": "string"
        },
        {
          "name": "chainId",
          "type": "uint256"
        },
        {
          "name": "verifyingContract",
          "type": "address"
        }
      ],
      "Permit": [
        {
          "name": "owner",
          "type": "address"
        },
        {
          "name": "spender",
          "type": "address"
        },
        {
          "name": "value",
          "type": "uint256"
        },
        {
          "name": "nonce",
          "type": "uint256"
        },
        {
          "name": "deadline",
          "type": "uint256"
        }
      ]
    }
  }
}

Parameters

Parameter	Type	Required	Description
`typedData`	object	Yes

Example response

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

{
  "digest": "0x23e8c55a0b5d344e0f50581dd1210e0656d001958874ac7ac06c60f1c4ad9704",
  "domain": {
    "chainId": 8453,
    "name": "USD Coin",
    "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "version": "2"
  },
  "domainSeparator": "0x02fa7265e7c5d81118673727957699e4d68f74cd74b7db77da710fe8a2c7834f",
  "message": {
    "deadline": "1893456000",
    "nonce": "0",
    "owner": "0x1111111111111111111111111111111111111111",
    "spender": "0x111111125421cA6dc452d289314280a0f8842A65",
    "value": "1000000"
  },
  "notes": [
    "verifyingContract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on chainId 8453",
    "ERC-2612 Permit: grants token allowance to spender, check value/deadline"
  ],
  "primaryType": "Permit"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://lumenworks-x402-decoder.onrender.com/v1/eip712/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"typedData":{"domain":{"chainId":8453,"name":"USD Coin","verifyingContract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","version":"2"},"message":{"deadline":"1893456000","nonce":"0","owner":"0x1111111111111111111111111111111111111111","spender":"0x111111125421cA6dc452d289314280a0f8842A65","value":"1000000"},"primaryType":"Permit","types":{"EIP712Domain":[{"name":"name","type":"string"},{"name":"version","type":"string"},{"name":"chainId","type":"uint256"},{"name":"verifyingContract","type":"address"}],"Permit":[{"name":"owner","type":"address"},{"name":"spender","type":"address"},{"name":"value","type":"uint256"},{"name":"nonce","type":"uint256"},{"name":"deadline","type":"uint256"}]}}}'

# 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://lumenworks-x402-decoder.onrender.com/v1/eip712/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"typedData":{"domain":{"chainId":8453,"name":"USD Coin","verifyingContract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","version":"2"},"message":{"deadline":"1893456000","nonce":"0","owner":"0x1111111111111111111111111111111111111111","spender":"0x111111125421cA6dc452d289314280a0f8842A65","value":"1000000"},"primaryType":"Permit","types":{"EIP712Domain":[{"name":"name","type":"string"},{"name":"version","type":"string"},{"name":"chainId","type":"uint256"},{"name":"verifyingContract","type":"address"}],"Permit":[{"name":"owner","type":"address"},{"name":"spender","type":"address"},{"name":"value","type":"uint256"},{"name":"nonce","type":"uint256"},{"name":"deadline","type":"uint256"}]}}}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Flumenworks-x402-decoder.onrender.com%2Fv1%2Feip712%2Fdecode&method=POST
const res = await pay("https://lumenworks-x402-decoder.onrender.com/v1/eip712/decode", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "typedData": {
      "domain": {
        "chainId": 8453,
        "name": "USD Coin",
        "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "version": "2"
      },
      "message": {
        "deadline": "1893456000",
        "nonce": "0",
        "owner": "0x1111111111111111111111111111111111111111",
        "spender": "0x111111125421cA6dc452d289314280a0f8842A65",
        "value": "1000000"
      },
      "primaryType": "Permit",
      "types": {
        "EIP712Domain": [
          {
            "name": "name",
            "type": "string"
          },
          {
            "name": "version",
            "type": "string"
          },
          {
            "name": "chainId",
            "type": "uint256"
          },
          {
            "name": "verifyingContract",
            "type": "address"
          }
        ],
        "Permit": [
          {
            "name": "owner",
            "type": "address"
          },
          {
            "name": "spender",
            "type": "address"
          },
          {
            "name": "value",
            "type": "uint256"
          },
          {
            "name": "nonce",
            "type": "uint256"
          },
          {
            "name": "deadline",
            "type": "uint256"
          }
        ]
      }
    }
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://lumenworks-x402-decoder.onrender.com/v1/eip712/decode",
        json={
            "typedData": {
                "domain": {
                    "chainId": 8453,
                    "name": "USD Coin",
                    "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                    "version": "2",
                },
                "message": {
                    "deadline": "1893456000",
                    "nonce": "0",
                    "owner": "0x1111111111111111111111111111111111111111",
                    "spender": "0x111111125421cA6dc452d289314280a0f8842A65",
                    "value": "1000000",
                },
                "primaryType": "Permit",
                "types": {
                    "EIP712Domain": [
                        {
                            "name": "name",
                            "type": "string",
                        },
                        {
                            "name": "version",
                            "type": "string",
                        },
                        {
                            "name": "chainId",
                            "type": "uint256",
                        },
                        {
                            "name": "verifyingContract",
                            "type": "address",
                        },
                    ],
                    "Permit": [
                        {
                            "name": "owner",
                            "type": "address",
                        },
                        {
                            "name": "spender",
                            "type": "address",
                        },
                        {
                            "name": "value",
                            "type": "uint256",
                        },
                        {
                            "name": "nonce",
                            "type": "uint256",
                        },
                        {
                            "name": "deadline",
                            "type": "uint256",
                        },
                    ],
                },
            },
        },
    )
    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

When	Result	HTTP	Time	Price
3 days ago	Expected HTTP 402, got 404	404	283 ms	-
4 days ago	Expected HTTP 402, got 404	404	189 ms	-
4 days ago	Expected HTTP 402, got 404	404	195 ms	-
4 days ago	Expected HTTP 402, got 404	404	662 ms	-
4 days ago	Expected HTTP 402, got 404	404	255 ms	-

Show 10 older checks

4 days ago	Expected HTTP 402, got 404	404	208 ms	-
4 days ago	Expected HTTP 402, got 404	404	285 ms	-
5 days ago	Expected HTTP 402, got 404	404	205 ms	-
5 days ago	Expected HTTP 402, got 404	404	249 ms	-
5 days ago	Expected HTTP 402, got 404	404	203 ms	-
5 days ago	Expected HTTP 402, got 404	404	483 ms	-
5 days ago	Expected HTTP 402, got 404	404	241 ms	-
6 days ago	Expected HTTP 402, got 404	404	250 ms	-
6 days ago	Expected HTTP 402, got 404	404	195 ms	-
6 days ago	Expected HTTP 402, got 404	404	564 ms	-

Trust score 10/ 100

Availability (30-day uptime)		0 / 30
Valid x402 challenge		0 / 15
Response time		0 / 10
Real paying agents (30 days)		0 / 15
Charges what it lists		0 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.002 per call
Listed at: $0.002
Token: USDC
Networks: Base, eip155:42220
Pays to: 0xee97…029A

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Trust score

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